SUM24L
3 source records. Standards, editions and conditions are presented separately; matching grade names do not establish interchangeability.
Refer to each source for mass fractions and analysis type. Missing values are not treated as 0. Manufacturer typical values, standard guarantees and measured heat results must remain separate. Use the material selector for calculations and condition selection.
Open condition selection, comparison and carbon-equivalent tools for SUM24L →SUM24L · JIS G4804
Chemical composition source verified; this does not verify every standard clause, actual supply or measured heat results
- Material form
- Wire rod
- Original record status
- Source edition identified; composition verification pending
- Standard edition
- JIS G 4804:2008
- Table / clause
- Table 1 · Notes a–d
Carbon-equivalent reference
Estimates are presented separately for each applicable composition condition. Match the actual ordering conditions; ranges must not be combined.
Heat analysis; Si is unspecified
IIW / CEV：0.1417–0.3417 Known-item contribution, not a complete value; missing Cr, Mo, V, Ni, Cu CEV = C + Mn/6 + (Cr + Mo + V)/5 + (Ni + Cu)/15; an engineering estimate of welding cold-cracking susceptibility for carbon and low-alloy steels.
Pcm（Ito–Bessyo）：0.0425–0.2075Known-element contribution; incomplete value; missing Si, Cu, Cr, Ni, Mo, V, B Pcm = C + Si/30 + (Mn + Cu + Cr)/20 + Ni/60 + Mo/15 + V/10 + 5B; mainly used for low-carbon low-alloy steels, particularly modern low-carbon pipeline steels; more relevant when C is approximately no higher than 0.11%.
CET：0.0850–0.2650 Known-item contribution, not a complete value; missing Mo, Cr, Cu, Ni CET = C + (Mn + Mo)/10 + (Cr + Cu)/20 + Ni/40; used in welding preheat assessment for ferritic steels, subject to the applicability conditions of EN 1011-2.
Product lead analysis (when requested by the purchaser); Si is unspecified
IIW / CEV：0.1417–0.3417 Known-item contribution, not a complete value; missing Cr, Mo, V, Ni, Cu CEV = C + Mn/6 + (Cr + Mo + V)/5 + (Ni + Cu)/15; an engineering estimate of welding cold-cracking susceptibility for carbon and low-alloy steels.
Pcm（Ito–Bessyo）：0.0425–0.2075Known-element contribution; incomplete value; missing Si, Cu, Cr, Ni, Mo, V, B Pcm = C + Si/30 + (Mn + Cu + Cr)/20 + Ni/60 + Mo/15 + V/10 + 5B; mainly used for low-carbon low-alloy steels, particularly modern low-carbon pipeline steels; more relevant when C is approximately no higher than 0.11%.
CET：0.0850–0.2650 Known-item contribution, not a complete value; missing Mo, Cr, Cu, Ni CET = C + (Mn + Mo)/10 + (Cr + Cu)/20 + Ni/40; used in welding preheat assessment for ferritic steels, subject to the applicability conditions of EN 1011-2.
Heat analysis; Agreed Si≤0.10%
IIW / CEV：0.1417–0.3417 Known-item contribution, not a complete value; missing Cr, Mo, V, Ni, Cu CEV = C + Mn/6 + (Cr + Mo + V)/5 + (Ni + Cu)/15; an engineering estimate of welding cold-cracking susceptibility for carbon and low-alloy steels.
Pcm（Ito–Bessyo）：0.0425–0.2108 Known-item contribution, not a complete value; missing Cu, Cr, Ni, Mo, V, B Pcm = C + Si/30 + (Mn + Cu + Cr)/20 + Ni/60 + Mo/15 + V/10 + 5B; mainly used for low-carbon low-alloy steels, particularly modern low-carbon pipeline steels; more relevant when C is approximately no higher than 0.11%.
CET：0.0850–0.2650 Known-item contribution, not a complete value; missing Mo, Cr, Cu, Ni CET = C + (Mn + Mo)/10 + (Cr + Cu)/20 + Ni/40; used in welding preheat assessment for ferritic steels, subject to the applicability conditions of EN 1011-2.
Product lead analysis (when requested by the purchaser); Agreed Si≤0.10%
IIW / CEV：0.1417–0.3417 Known-item contribution, not a complete value; missing Cr, Mo, V, Ni, Cu CEV = C + Mn/6 + (Cr + Mo + V)/5 + (Ni + Cu)/15; an engineering estimate of welding cold-cracking susceptibility for carbon and low-alloy steels.
Pcm（Ito–Bessyo）：0.0425–0.2108 Known-item contribution, not a complete value; missing Cu, Cr, Ni, Mo, V, B Pcm = C + Si/30 + (Mn + Cu + Cr)/20 + Ni/60 + Mo/15 + V/10 + 5B; mainly used for low-carbon low-alloy steels, particularly modern low-carbon pipeline steels; more relevant when C is approximately no higher than 0.11%.
CET：0.0850–0.2650 Known-item contribution, not a complete value; missing Mo, Cr, Cu, Ni CET = C + (Mn + Mo)/10 + (Cr + Cu)/20 + Ni/40; used in welding preheat assessment for ferritic steels, subject to the applicability conditions of EN 1011-2.
Heat analysis; Agreed Si0.10–0.20%
IIW / CEV：0.1417–0.3417 Known-item contribution, not a complete value; missing Cr, Mo, V, Ni, Cu CEV = C + Mn/6 + (Cr + Mo + V)/5 + (Ni + Cu)/15; an engineering estimate of welding cold-cracking susceptibility for carbon and low-alloy steels.
Pcm（Ito–Bessyo）：0.0458–0.2142 Known-item contribution, not a complete value; missing Cu, Cr, Ni, Mo, V, B Pcm = C + Si/30 + (Mn + Cu + Cr)/20 + Ni/60 + Mo/15 + V/10 + 5B; mainly used for low-carbon low-alloy steels, particularly modern low-carbon pipeline steels; more relevant when C is approximately no higher than 0.11%.
CET：0.0850–0.2650 Known-item contribution, not a complete value; missing Mo, Cr, Cu, Ni CET = C + (Mn + Mo)/10 + (Cr + Cu)/20 + Ni/40; used in welding preheat assessment for ferritic steels, subject to the applicability conditions of EN 1011-2.
Product lead analysis (when requested by the purchaser); Agreed Si0.10–0.20%
IIW / CEV：0.1417–0.3417 Known-item contribution, not a complete value; missing Cr, Mo, V, Ni, Cu CEV = C + Mn/6 + (Cr + Mo + V)/5 + (Ni + Cu)/15; an engineering estimate of welding cold-cracking susceptibility for carbon and low-alloy steels.
Pcm（Ito–Bessyo）：0.0458–0.2142 Known-item contribution, not a complete value; missing Cu, Cr, Ni, Mo, V, B Pcm = C + Si/30 + (Mn + Cu + Cr)/20 + Ni/60 + Mo/15 + V/10 + 5B; mainly used for low-carbon low-alloy steels, particularly modern low-carbon pipeline steels; more relevant when C is approximately no higher than 0.11%.
CET：0.0850–0.2650 Known-item contribution, not a complete value; missing Mo, Cr, Cu, Ni CET = C + (Mn + Mo)/10 + (Cr + Cu)/20 + Ni/40; used in welding preheat assessment for ferritic steels, subject to the applicability conditions of EN 1011-2.
Heat analysis; Agreed Si0.15–0.35%
IIW / CEV：0.1417–0.3417 Known-item contribution, not a complete value; missing Cr, Mo, V, Ni, Cu CEV = C + Mn/6 + (Cr + Mo + V)/5 + (Ni + Cu)/15; an engineering estimate of welding cold-cracking susceptibility for carbon and low-alloy steels.
Pcm（Ito–Bessyo）：0.0475–0.2192 Known-item contribution, not a complete value; missing Cu, Cr, Ni, Mo, V, B Pcm = C + Si/30 + (Mn + Cu + Cr)/20 + Ni/60 + Mo/15 + V/10 + 5B; mainly used for low-carbon low-alloy steels, particularly modern low-carbon pipeline steels; more relevant when C is approximately no higher than 0.11%.
CET：0.0850–0.2650 Known-item contribution, not a complete value; missing Mo, Cr, Cu, Ni CET = C + (Mn + Mo)/10 + (Cr + Cu)/20 + Ni/40; used in welding preheat assessment for ferritic steels, subject to the applicability conditions of EN 1011-2.
Product lead analysis (when requested by the purchaser); Agreed Si0.15–0.35%
IIW / CEV：0.1417–0.3417 Known-item contribution, not a complete value; missing Cr, Mo, V, Ni, Cu CEV = C + Mn/6 + (Cr + Mo + V)/5 + (Ni + Cu)/15; an engineering estimate of welding cold-cracking susceptibility for carbon and low-alloy steels.
Pcm（Ito–Bessyo）：0.0475–0.2192 Known-item contribution, not a complete value; missing Cu, Cr, Ni, Mo, V, B Pcm = C + Si/30 + (Mn + Cu + Cr)/20 + Ni/60 + Mo/15 + V/10 + 5B; mainly used for low-carbon low-alloy steels, particularly modern low-carbon pipeline steels; more relevant when C is approximately no higher than 0.11%.
CET：0.0850–0.2650 Known-item contribution, not a complete value; missing Mo, Cr, Cu, Ni CET = C + (Mn + Mo)/10 + (Cr + Cu)/20 + Ni/40; used in welding preheat assessment for ferritic steels, subject to the applicability conditions of EN 1011-2.
Composition record (conditional branches apply; this is not an unconditional requirement)
| Element | Composition requirement |
|---|---|
| C | ≤ 0.15 (lower limit not stated) |
| Mn | 0.85 ～ 1.15 |
| P | 0.04 ～ 0.09 |
| S | 0.26 ～ 0.35 |
| Pb | 0.1 ～ 0.35 |
Applicability and limitations
Composition is based on JIS G 4804:2008; No edition is identified for the product; the contractually applicable edition must be confirmed.
Composition conditions
- Table 1 mass fraction %, default is heat analysis.
- Note a: Si is not specified; it may be agreed to use ≤0.10%, 0.10–0.20%, 0.15–0.35%, etc.; The listed items are not the only possible agreed ranges.
- Note b: Without agreement between both parties, elements not specified shall not be intentionally added for purposes other than to finish steelmaking; Blank entries must not be treated as zero.
- Note c: Only SUM22/SUM22L may have an agreed Mn upper limit of 1.10%.
- Note d: For lead-bearing steels, when the purchaser requests Pb product analysis, Pb 0.07–0.35%; Do not use this lower limit to replace heat analysis 0.10%.
- The composition of high-sulfur free-cutting steel does not equate to suitability for cold heading; plasticity and part processes must be verified independently.
Original condition-branch records
Heat analysis; Si is unspecified
| Element | Composition requirement |
|---|---|
| C | ≤ 0.15 (lower limit not stated) |
| Mn | 0.85 ～ 1.15 |
| P | 0.04 ～ 0.09 |
| S | 0.26 ～ 0.35 |
| Pb | 0.1 ～ 0.35 |
Product lead analysis (when requested by the purchaser); Si is unspecified
| Element | Composition requirement |
|---|---|
| C | ≤ 0.15 (lower limit not stated) |
| Mn | 0.85 ～ 1.15 |
| P | 0.04 ～ 0.09 |
| S | 0.26 ～ 0.35 |
| Pb | 0.07 ～ 0.35 |
Heat analysis; Agreed Si≤0.10%
| Element | Composition requirement |
|---|---|
| C | ≤ 0.15 (lower limit not stated) |
| Mn | 0.85 ～ 1.15 |
| P | 0.04 ～ 0.09 |
| S | 0.26 ～ 0.35 |
| Pb | 0.1 ～ 0.35 |
| Si | ≤ 0.1 (lower limit not stated) |
Product lead analysis (when requested by the purchaser); Agreed Si≤0.10%
| Element | Composition requirement |
|---|---|
| C | ≤ 0.15 (lower limit not stated) |
| Mn | 0.85 ～ 1.15 |
| P | 0.04 ～ 0.09 |
| S | 0.26 ～ 0.35 |
| Pb | 0.07 ～ 0.35 |
| Si | ≤ 0.1 (lower limit not stated) |
Heat analysis; Agreed Si0.10–0.20%
| Element | Composition requirement |
|---|---|
| C | ≤ 0.15 (lower limit not stated) |
| Mn | 0.85 ～ 1.15 |
| P | 0.04 ～ 0.09 |
| S | 0.26 ～ 0.35 |
| Pb | 0.1 ～ 0.35 |
| Si | 0.1 ～ 0.2 |
Product lead analysis (when requested by the purchaser); Agreed Si0.10–0.20%
| Element | Composition requirement |
|---|---|
| C | ≤ 0.15 (lower limit not stated) |
| Mn | 0.85 ～ 1.15 |
| P | 0.04 ～ 0.09 |
| S | 0.26 ～ 0.35 |
| Pb | 0.07 ～ 0.35 |
| Si | 0.1 ～ 0.2 |
Heat analysis; Agreed Si0.15–0.35%
| Element | Composition requirement |
|---|---|
| C | ≤ 0.15 (lower limit not stated) |
| Mn | 0.85 ～ 1.15 |
| P | 0.04 ～ 0.09 |
| S | 0.26 ～ 0.35 |
| Pb | 0.1 ～ 0.35 |
| Si | 0.15 ～ 0.35 |
Product lead analysis (when requested by the purchaser); Agreed Si0.15–0.35%
| Element | Composition requirement |
|---|---|
| C | ≤ 0.15 (lower limit not stated) |
| Mn | 0.85 ～ 1.15 |
| P | 0.04 ～ 0.09 |
| S | 0.26 ～ 0.35 |
| Pb | 0.07 ～ 0.35 |
| Si | 0.15 ～ 0.35 |
A condition branch must be selected
YesVerification notes
Composition is based on JIS G 4804:2008; No edition is identified for the product; the contractually applicable edition must be confirmed.View associated products →SUM24L · JIS G 4804:2008
Chemical composition source verified; this does not verify every standard clause, actual supply or measured heat results
- Material category
- Carbon steel
- Subcategory
- Free-cutting steel
- Material form
- Reference record
- Original record status
- Original standard verified
- Standard edition
- JIS G 4804:2008
- Table / clause
- Table 1 · Notes a–d
Carbon-equivalent reference
Estimates are presented separately for each applicable composition condition. Match the actual ordering conditions; ranges must not be combined.
Heat analysis; Si is unspecified
IIW / CEV：0.1417–0.3417 Known-item contribution, not a complete value; missing Cr, Mo, V, Ni, Cu CEV = C + Mn/6 + (Cr + Mo + V)/5 + (Ni + Cu)/15; an engineering estimate of welding cold-cracking susceptibility for carbon and low-alloy steels.
Pcm（Ito–Bessyo）：0.0425–0.2075Known-element contribution; incomplete value; missing Si, Cu, Cr, Ni, Mo, V, B Pcm = C + Si/30 + (Mn + Cu + Cr)/20 + Ni/60 + Mo/15 + V/10 + 5B; mainly used for low-carbon low-alloy steels, particularly modern low-carbon pipeline steels; more relevant when C is approximately no higher than 0.11%.
CET：0.0850–0.2650 Known-item contribution, not a complete value; missing Mo, Cr, Cu, Ni CET = C + (Mn + Mo)/10 + (Cr + Cu)/20 + Ni/40; used in welding preheat assessment for ferritic steels, subject to the applicability conditions of EN 1011-2.
Product lead analysis (when requested by the purchaser); Si is unspecified
IIW / CEV：0.1417–0.3417 Known-item contribution, not a complete value; missing Cr, Mo, V, Ni, Cu CEV = C + Mn/6 + (Cr + Mo + V)/5 + (Ni + Cu)/15; an engineering estimate of welding cold-cracking susceptibility for carbon and low-alloy steels.
Pcm（Ito–Bessyo）：0.0425–0.2075Known-element contribution; incomplete value; missing Si, Cu, Cr, Ni, Mo, V, B Pcm = C + Si/30 + (Mn + Cu + Cr)/20 + Ni/60 + Mo/15 + V/10 + 5B; mainly used for low-carbon low-alloy steels, particularly modern low-carbon pipeline steels; more relevant when C is approximately no higher than 0.11%.
CET：0.0850–0.2650 Known-item contribution, not a complete value; missing Mo, Cr, Cu, Ni CET = C + (Mn + Mo)/10 + (Cr + Cu)/20 + Ni/40; used in welding preheat assessment for ferritic steels, subject to the applicability conditions of EN 1011-2.
Heat analysis; Agreed Si≤0.10%
IIW / CEV：0.1417–0.3417 Known-item contribution, not a complete value; missing Cr, Mo, V, Ni, Cu CEV = C + Mn/6 + (Cr + Mo + V)/5 + (Ni + Cu)/15; an engineering estimate of welding cold-cracking susceptibility for carbon and low-alloy steels.
Pcm（Ito–Bessyo）：0.0425–0.2108 Known-item contribution, not a complete value; missing Cu, Cr, Ni, Mo, V, B Pcm = C + Si/30 + (Mn + Cu + Cr)/20 + Ni/60 + Mo/15 + V/10 + 5B; mainly used for low-carbon low-alloy steels, particularly modern low-carbon pipeline steels; more relevant when C is approximately no higher than 0.11%.
CET：0.0850–0.2650 Known-item contribution, not a complete value; missing Mo, Cr, Cu, Ni CET = C + (Mn + Mo)/10 + (Cr + Cu)/20 + Ni/40; used in welding preheat assessment for ferritic steels, subject to the applicability conditions of EN 1011-2.
Product lead analysis (when requested by the purchaser); Agreed Si≤0.10%
IIW / CEV：0.1417–0.3417 Known-item contribution, not a complete value; missing Cr, Mo, V, Ni, Cu CEV = C + Mn/6 + (Cr + Mo + V)/5 + (Ni + Cu)/15; an engineering estimate of welding cold-cracking susceptibility for carbon and low-alloy steels.
Pcm（Ito–Bessyo）：0.0425–0.2108 Known-item contribution, not a complete value; missing Cu, Cr, Ni, Mo, V, B Pcm = C + Si/30 + (Mn + Cu + Cr)/20 + Ni/60 + Mo/15 + V/10 + 5B; mainly used for low-carbon low-alloy steels, particularly modern low-carbon pipeline steels; more relevant when C is approximately no higher than 0.11%.
CET：0.0850–0.2650 Known-item contribution, not a complete value; missing Mo, Cr, Cu, Ni CET = C + (Mn + Mo)/10 + (Cr + Cu)/20 + Ni/40; used in welding preheat assessment for ferritic steels, subject to the applicability conditions of EN 1011-2.
Heat analysis; Agreed Si0.10–0.20%
IIW / CEV：0.1417–0.3417 Known-item contribution, not a complete value; missing Cr, Mo, V, Ni, Cu CEV = C + Mn/6 + (Cr + Mo + V)/5 + (Ni + Cu)/15; an engineering estimate of welding cold-cracking susceptibility for carbon and low-alloy steels.
Pcm（Ito–Bessyo）：0.0458–0.2142 Known-item contribution, not a complete value; missing Cu, Cr, Ni, Mo, V, B Pcm = C + Si/30 + (Mn + Cu + Cr)/20 + Ni/60 + Mo/15 + V/10 + 5B; mainly used for low-carbon low-alloy steels, particularly modern low-carbon pipeline steels; more relevant when C is approximately no higher than 0.11%.
CET：0.0850–0.2650 Known-item contribution, not a complete value; missing Mo, Cr, Cu, Ni CET = C + (Mn + Mo)/10 + (Cr + Cu)/20 + Ni/40; used in welding preheat assessment for ferritic steels, subject to the applicability conditions of EN 1011-2.
Product lead analysis (when requested by the purchaser); Agreed Si0.10–0.20%
IIW / CEV：0.1417–0.3417 Known-item contribution, not a complete value; missing Cr, Mo, V, Ni, Cu CEV = C + Mn/6 + (Cr + Mo + V)/5 + (Ni + Cu)/15; an engineering estimate of welding cold-cracking susceptibility for carbon and low-alloy steels.
Pcm（Ito–Bessyo）：0.0458–0.2142 Known-item contribution, not a complete value; missing Cu, Cr, Ni, Mo, V, B Pcm = C + Si/30 + (Mn + Cu + Cr)/20 + Ni/60 + Mo/15 + V/10 + 5B; mainly used for low-carbon low-alloy steels, particularly modern low-carbon pipeline steels; more relevant when C is approximately no higher than 0.11%.
CET：0.0850–0.2650 Known-item contribution, not a complete value; missing Mo, Cr, Cu, Ni CET = C + (Mn + Mo)/10 + (Cr + Cu)/20 + Ni/40; used in welding preheat assessment for ferritic steels, subject to the applicability conditions of EN 1011-2.
Heat analysis; Agreed Si0.15–0.35%
IIW / CEV：0.1417–0.3417 Known-item contribution, not a complete value; missing Cr, Mo, V, Ni, Cu CEV = C + Mn/6 + (Cr + Mo + V)/5 + (Ni + Cu)/15; an engineering estimate of welding cold-cracking susceptibility for carbon and low-alloy steels.
Pcm（Ito–Bessyo）：0.0475–0.2192 Known-item contribution, not a complete value; missing Cu, Cr, Ni, Mo, V, B Pcm = C + Si/30 + (Mn + Cu + Cr)/20 + Ni/60 + Mo/15 + V/10 + 5B; mainly used for low-carbon low-alloy steels, particularly modern low-carbon pipeline steels; more relevant when C is approximately no higher than 0.11%.
CET：0.0850–0.2650 Known-item contribution, not a complete value; missing Mo, Cr, Cu, Ni CET = C + (Mn + Mo)/10 + (Cr + Cu)/20 + Ni/40; used in welding preheat assessment for ferritic steels, subject to the applicability conditions of EN 1011-2.
Product lead analysis (when requested by the purchaser); Agreed Si0.15–0.35%
IIW / CEV：0.1417–0.3417 Known-item contribution, not a complete value; missing Cr, Mo, V, Ni, Cu CEV = C + Mn/6 + (Cr + Mo + V)/5 + (Ni + Cu)/15; an engineering estimate of welding cold-cracking susceptibility for carbon and low-alloy steels.
Pcm（Ito–Bessyo）：0.0475–0.2192 Known-item contribution, not a complete value; missing Cu, Cr, Ni, Mo, V, B Pcm = C + Si/30 + (Mn + Cu + Cr)/20 + Ni/60 + Mo/15 + V/10 + 5B; mainly used for low-carbon low-alloy steels, particularly modern low-carbon pipeline steels; more relevant when C is approximately no higher than 0.11%.
CET：0.0850–0.2650 Known-item contribution, not a complete value; missing Mo, Cr, Cu, Ni CET = C + (Mn + Mo)/10 + (Cr + Cu)/20 + Ni/40; used in welding preheat assessment for ferritic steels, subject to the applicability conditions of EN 1011-2.
Composition record (conditional branches apply; this is not an unconditional requirement)
| Element | Composition requirement |
|---|---|
| C | ≤ 0.15 (lower limit not stated) |
| Mn | 0.85 ～ 1.15 |
| P | 0.04 ～ 0.09 |
| S | 0.26 ～ 0.35 |
| Pb | 0.1 ～ 0.35 |
Applicability and limitations
Table 1 mass fraction %, default is heat analysis. ; Note a: Si is not specified; it may be agreed to use ≤0.10%, 0.10–0.20%, 0.15–0.35%, etc.; The listed items are not the only possible agreed ranges. ; Note b: Without agreement between both parties, elements not specified shall not be intentionally added for purposes other than to finish steelmaking; Blank entries must not be treated as zero. ; Note c: Only SUM22/SUM22L may have an agreed Mn upper limit of 1.10%. ; Note d: For lead-bearing steels, when the purchaser requests Pb product analysis, Pb 0.07–0.35%; Do not use this lower limit to replace heat analysis 0.10%. ; The composition of high-sulfur free-cutting steel does not equate to suitability for cold heading; plasticity and part processes must be verified independently.
Original condition-branch records
Heat analysis; Si is unspecified
| Element | Composition requirement |
|---|---|
| C | ≤ 0.15 (lower limit not stated) |
| Mn | 0.85 ～ 1.15 |
| P | 0.04 ～ 0.09 |
| S | 0.26 ～ 0.35 |
| Pb | 0.1 ～ 0.35 |
Product lead analysis (when requested by the purchaser); Si is unspecified
| Element | Composition requirement |
|---|---|
| C | ≤ 0.15 (lower limit not stated) |
| Mn | 0.85 ～ 1.15 |
| P | 0.04 ～ 0.09 |
| S | 0.26 ～ 0.35 |
| Pb | 0.07 ～ 0.35 |
Heat analysis; Agreed Si≤0.10%
| Element | Composition requirement |
|---|---|
| C | ≤ 0.15 (lower limit not stated) |
| Mn | 0.85 ～ 1.15 |
| P | 0.04 ～ 0.09 |
| S | 0.26 ～ 0.35 |
| Pb | 0.1 ～ 0.35 |
| Si | ≤ 0.1 (lower limit not stated) |
Product lead analysis (when requested by the purchaser); Agreed Si≤0.10%
| Element | Composition requirement |
|---|---|
| C | ≤ 0.15 (lower limit not stated) |
| Mn | 0.85 ～ 1.15 |
| P | 0.04 ～ 0.09 |
| S | 0.26 ～ 0.35 |
| Pb | 0.07 ～ 0.35 |
| Si | ≤ 0.1 (lower limit not stated) |
Heat analysis; Agreed Si0.10–0.20%
| Element | Composition requirement |
|---|---|
| C | ≤ 0.15 (lower limit not stated) |
| Mn | 0.85 ～ 1.15 |
| P | 0.04 ～ 0.09 |
| S | 0.26 ～ 0.35 |
| Pb | 0.1 ～ 0.35 |
| Si | 0.1 ～ 0.2 |
Product lead analysis (when requested by the purchaser); Agreed Si0.10–0.20%
| Element | Composition requirement |
|---|---|
| C | ≤ 0.15 (lower limit not stated) |
| Mn | 0.85 ～ 1.15 |
| P | 0.04 ～ 0.09 |
| S | 0.26 ～ 0.35 |
| Pb | 0.07 ～ 0.35 |
| Si | 0.1 ～ 0.2 |
Heat analysis; Agreed Si0.15–0.35%
| Element | Composition requirement |
|---|---|
| C | ≤ 0.15 (lower limit not stated) |
| Mn | 0.85 ～ 1.15 |
| P | 0.04 ～ 0.09 |
| S | 0.26 ～ 0.35 |
| Pb | 0.1 ～ 0.35 |
| Si | 0.15 ～ 0.35 |
Product lead analysis (when requested by the purchaser); Agreed Si0.15–0.35%
| Element | Composition requirement |
|---|---|
| C | ≤ 0.15 (lower limit not stated) |
| Mn | 0.85 ～ 1.15 |
| P | 0.04 ～ 0.09 |
| S | 0.26 ～ 0.35 |
| Pb | 0.07 ～ 0.35 |
| Si | 0.15 ～ 0.35 |
A condition branch must be selected
YesVerification notes
Original Japanese PDF4, Table 1 and all footnotes have been checkedSUM24L · JIS G 4804-2021
Chemical composition source verified; this does not verify every standard clause, actual supply or measured heat results
- Material form
- Reference record
- Original record status
- Historical-edition reference
- Standard edition
- JIS G 4804:2008
- Table / clause
- Table 1 · Notes a–d
Carbon-equivalent reference
Estimates are presented separately for each applicable composition condition. Match the actual ordering conditions; ranges must not be combined.
Heat analysis; Si is unspecified
IIW / CEV：0.1417–0.3417 Known-item contribution, not a complete value; missing Cr, Mo, V, Ni, Cu CEV = C + Mn/6 + (Cr + Mo + V)/5 + (Ni + Cu)/15; an engineering estimate of welding cold-cracking susceptibility for carbon and low-alloy steels.
Pcm（Ito–Bessyo）：0.0425–0.2075Known-element contribution; incomplete value; missing Si, Cu, Cr, Ni, Mo, V, B Pcm = C + Si/30 + (Mn + Cu + Cr)/20 + Ni/60 + Mo/15 + V/10 + 5B; mainly used for low-carbon low-alloy steels, particularly modern low-carbon pipeline steels; more relevant when C is approximately no higher than 0.11%.
CET：0.0850–0.2650 Known-item contribution, not a complete value; missing Mo, Cr, Cu, Ni CET = C + (Mn + Mo)/10 + (Cr + Cu)/20 + Ni/40; used in welding preheat assessment for ferritic steels, subject to the applicability conditions of EN 1011-2.
Product lead analysis (when requested by the purchaser); Si is unspecified
IIW / CEV：0.1417–0.3417 Known-item contribution, not a complete value; missing Cr, Mo, V, Ni, Cu CEV = C + Mn/6 + (Cr + Mo + V)/5 + (Ni + Cu)/15; an engineering estimate of welding cold-cracking susceptibility for carbon and low-alloy steels.
Pcm（Ito–Bessyo）：0.0425–0.2075Known-element contribution; incomplete value; missing Si, Cu, Cr, Ni, Mo, V, B Pcm = C + Si/30 + (Mn + Cu + Cr)/20 + Ni/60 + Mo/15 + V/10 + 5B; mainly used for low-carbon low-alloy steels, particularly modern low-carbon pipeline steels; more relevant when C is approximately no higher than 0.11%.
CET：0.0850–0.2650 Known-item contribution, not a complete value; missing Mo, Cr, Cu, Ni CET = C + (Mn + Mo)/10 + (Cr + Cu)/20 + Ni/40; used in welding preheat assessment for ferritic steels, subject to the applicability conditions of EN 1011-2.
Heat analysis; Agreed Si≤0.10%
IIW / CEV：0.1417–0.3417 Known-item contribution, not a complete value; missing Cr, Mo, V, Ni, Cu CEV = C + Mn/6 + (Cr + Mo + V)/5 + (Ni + Cu)/15; an engineering estimate of welding cold-cracking susceptibility for carbon and low-alloy steels.
Pcm（Ito–Bessyo）：0.0425–0.2108 Known-item contribution, not a complete value; missing Cu, Cr, Ni, Mo, V, B Pcm = C + Si/30 + (Mn + Cu + Cr)/20 + Ni/60 + Mo/15 + V/10 + 5B; mainly used for low-carbon low-alloy steels, particularly modern low-carbon pipeline steels; more relevant when C is approximately no higher than 0.11%.
CET：0.0850–0.2650 Known-item contribution, not a complete value; missing Mo, Cr, Cu, Ni CET = C + (Mn + Mo)/10 + (Cr + Cu)/20 + Ni/40; used in welding preheat assessment for ferritic steels, subject to the applicability conditions of EN 1011-2.
Product lead analysis (when requested by the purchaser); Agreed Si≤0.10%
IIW / CEV：0.1417–0.3417 Known-item contribution, not a complete value; missing Cr, Mo, V, Ni, Cu CEV = C + Mn/6 + (Cr + Mo + V)/5 + (Ni + Cu)/15; an engineering estimate of welding cold-cracking susceptibility for carbon and low-alloy steels.
Pcm（Ito–Bessyo）：0.0425–0.2108 Known-item contribution, not a complete value; missing Cu, Cr, Ni, Mo, V, B Pcm = C + Si/30 + (Mn + Cu + Cr)/20 + Ni/60 + Mo/15 + V/10 + 5B; mainly used for low-carbon low-alloy steels, particularly modern low-carbon pipeline steels; more relevant when C is approximately no higher than 0.11%.
CET：0.0850–0.2650 Known-item contribution, not a complete value; missing Mo, Cr, Cu, Ni CET = C + (Mn + Mo)/10 + (Cr + Cu)/20 + Ni/40; used in welding preheat assessment for ferritic steels, subject to the applicability conditions of EN 1011-2.
Heat analysis; Agreed Si0.10–0.20%
IIW / CEV：0.1417–0.3417 Known-item contribution, not a complete value; missing Cr, Mo, V, Ni, Cu CEV = C + Mn/6 + (Cr + Mo + V)/5 + (Ni + Cu)/15; an engineering estimate of welding cold-cracking susceptibility for carbon and low-alloy steels.
Pcm（Ito–Bessyo）：0.0458–0.2142 Known-item contribution, not a complete value; missing Cu, Cr, Ni, Mo, V, B Pcm = C + Si/30 + (Mn + Cu + Cr)/20 + Ni/60 + Mo/15 + V/10 + 5B; mainly used for low-carbon low-alloy steels, particularly modern low-carbon pipeline steels; more relevant when C is approximately no higher than 0.11%.
CET：0.0850–0.2650 Known-item contribution, not a complete value; missing Mo, Cr, Cu, Ni CET = C + (Mn + Mo)/10 + (Cr + Cu)/20 + Ni/40; used in welding preheat assessment for ferritic steels, subject to the applicability conditions of EN 1011-2.
Product lead analysis (when requested by the purchaser); Agreed Si0.10–0.20%
IIW / CEV：0.1417–0.3417 Known-item contribution, not a complete value; missing Cr, Mo, V, Ni, Cu CEV = C + Mn/6 + (Cr + Mo + V)/5 + (Ni + Cu)/15; an engineering estimate of welding cold-cracking susceptibility for carbon and low-alloy steels.
Pcm（Ito–Bessyo）：0.0458–0.2142 Known-item contribution, not a complete value; missing Cu, Cr, Ni, Mo, V, B Pcm = C + Si/30 + (Mn + Cu + Cr)/20 + Ni/60 + Mo/15 + V/10 + 5B; mainly used for low-carbon low-alloy steels, particularly modern low-carbon pipeline steels; more relevant when C is approximately no higher than 0.11%.
CET：0.0850–0.2650 Known-item contribution, not a complete value; missing Mo, Cr, Cu, Ni CET = C + (Mn + Mo)/10 + (Cr + Cu)/20 + Ni/40; used in welding preheat assessment for ferritic steels, subject to the applicability conditions of EN 1011-2.
Heat analysis; Agreed Si0.15–0.35%
IIW / CEV：0.1417–0.3417 Known-item contribution, not a complete value; missing Cr, Mo, V, Ni, Cu CEV = C + Mn/6 + (Cr + Mo + V)/5 + (Ni + Cu)/15; an engineering estimate of welding cold-cracking susceptibility for carbon and low-alloy steels.
Pcm（Ito–Bessyo）：0.0475–0.2192 Known-item contribution, not a complete value; missing Cu, Cr, Ni, Mo, V, B Pcm = C + Si/30 + (Mn + Cu + Cr)/20 + Ni/60 + Mo/15 + V/10 + 5B; mainly used for low-carbon low-alloy steels, particularly modern low-carbon pipeline steels; more relevant when C is approximately no higher than 0.11%.
CET：0.0850–0.2650 Known-item contribution, not a complete value; missing Mo, Cr, Cu, Ni CET = C + (Mn + Mo)/10 + (Cr + Cu)/20 + Ni/40; used in welding preheat assessment for ferritic steels, subject to the applicability conditions of EN 1011-2.
Product lead analysis (when requested by the purchaser); Agreed Si0.15–0.35%
IIW / CEV：0.1417–0.3417 Known-item contribution, not a complete value; missing Cr, Mo, V, Ni, Cu CEV = C + Mn/6 + (Cr + Mo + V)/5 + (Ni + Cu)/15; an engineering estimate of welding cold-cracking susceptibility for carbon and low-alloy steels.
Pcm（Ito–Bessyo）：0.0475–0.2192 Known-item contribution, not a complete value; missing Cu, Cr, Ni, Mo, V, B Pcm = C + Si/30 + (Mn + Cu + Cr)/20 + Ni/60 + Mo/15 + V/10 + 5B; mainly used for low-carbon low-alloy steels, particularly modern low-carbon pipeline steels; more relevant when C is approximately no higher than 0.11%.
CET：0.0850–0.2650 Known-item contribution, not a complete value; missing Mo, Cr, Cu, Ni CET = C + (Mn + Mo)/10 + (Cr + Cu)/20 + Ni/40; used in welding preheat assessment for ferritic steels, subject to the applicability conditions of EN 1011-2.
Composition record (conditional branches apply; this is not an unconditional requirement)
| Element | Composition requirement |
|---|---|
| C | ≤ 0.15 (lower limit not stated) |
| Mn | 0.85 ～ 1.15 |
| P | 0.04 ～ 0.09 |
| S | 0.26 ～ 0.35 |
| Pb | 0.1 ～ 0.35 |
Applicability and limitations
The chemical composition currently shown is transcribed from the original JIS G 4804:2008; The original record cites JIS G 4804-2021; that original edition remains unavailable, and differences between editions have not been confirmed. Table 1 mass fraction %, default is heat analysis. ; Note a: Si is not specified; it may be agreed to use ≤0.10%, 0.10–0.20%, 0.15–0.35%, etc.; The listed items are not the only possible agreed ranges. ; Note b: Without agreement between both parties, elements not specified shall not be intentionally added for purposes other than to finish steelmaking; Blank entries must not be treated as zero. ; Note c: Only SUM22/SUM22L may have an agreed Mn upper limit of 1.10%. ; Note d: For lead-bearing steels, when the purchaser requests Pb product analysis, Pb 0.07–0.35%; Do not use this lower limit to replace heat analysis 0.10%. ; The composition of high-sulfur free-cutting steel does not equate to suitability for cold heading; plasticity and part processes must be verified independently.
Original condition-branch records
Heat analysis; Si is unspecified
| Element | Composition requirement |
|---|---|
| C | ≤ 0.15 (lower limit not stated) |
| Mn | 0.85 ～ 1.15 |
| P | 0.04 ～ 0.09 |
| S | 0.26 ～ 0.35 |
| Pb | 0.1 ～ 0.35 |
Product lead analysis (when requested by the purchaser); Si is unspecified
| Element | Composition requirement |
|---|---|
| C | ≤ 0.15 (lower limit not stated) |
| Mn | 0.85 ～ 1.15 |
| P | 0.04 ～ 0.09 |
| S | 0.26 ～ 0.35 |
| Pb | 0.07 ～ 0.35 |
Heat analysis; Agreed Si≤0.10%
| Element | Composition requirement |
|---|---|
| C | ≤ 0.15 (lower limit not stated) |
| Mn | 0.85 ～ 1.15 |
| P | 0.04 ～ 0.09 |
| S | 0.26 ～ 0.35 |
| Pb | 0.1 ～ 0.35 |
| Si | ≤ 0.1 (lower limit not stated) |
Product lead analysis (when requested by the purchaser); Agreed Si≤0.10%
| Element | Composition requirement |
|---|---|
| C | ≤ 0.15 (lower limit not stated) |
| Mn | 0.85 ～ 1.15 |
| P | 0.04 ～ 0.09 |
| S | 0.26 ～ 0.35 |
| Pb | 0.07 ～ 0.35 |
| Si | ≤ 0.1 (lower limit not stated) |
Heat analysis; Agreed Si0.10–0.20%
| Element | Composition requirement |
|---|---|
| C | ≤ 0.15 (lower limit not stated) |
| Mn | 0.85 ～ 1.15 |
| P | 0.04 ～ 0.09 |
| S | 0.26 ～ 0.35 |
| Pb | 0.1 ～ 0.35 |
| Si | 0.1 ～ 0.2 |
Product lead analysis (when requested by the purchaser); Agreed Si0.10–0.20%
| Element | Composition requirement |
|---|---|
| C | ≤ 0.15 (lower limit not stated) |
| Mn | 0.85 ～ 1.15 |
| P | 0.04 ～ 0.09 |
| S | 0.26 ～ 0.35 |
| Pb | 0.07 ～ 0.35 |
| Si | 0.1 ～ 0.2 |
Heat analysis; Agreed Si0.15–0.35%
| Element | Composition requirement |
|---|---|
| C | ≤ 0.15 (lower limit not stated) |
| Mn | 0.85 ～ 1.15 |
| P | 0.04 ～ 0.09 |
| S | 0.26 ～ 0.35 |
| Pb | 0.1 ～ 0.35 |
| Si | 0.15 ～ 0.35 |
Product lead analysis (when requested by the purchaser); Agreed Si0.15–0.35%
| Element | Composition requirement |
|---|---|
| C | ≤ 0.15 (lower limit not stated) |
| Mn | 0.85 ～ 1.15 |
| P | 0.04 ～ 0.09 |
| S | 0.26 ～ 0.35 |
| Pb | 0.07 ～ 0.35 |
| Si | 0.15 ～ 0.35 |