S65C
2 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 S65C →S65C · JIS G 4051-2023
Chemical composition source verified; this does not verify every standard clause, actual supply or measured heat results
- Material form
- Plate, sheet and strip only
- Original record status
- Original standard verified
- Standard edition
- JIS G 4051-2023
- Table / clause
- Annex JB, Table JB.1 and note a/b
Carbon-equivalent reference
Estimates are presented separately for each applicable composition condition. Match the actual ordering conditions; ranges must not be combined.
Table limits; Ni+Cr≤0.35%
IIW / CEV：0.7000–0.9233Known-element contribution; incomplete value; missing Mo, V; coupled-element constraints require separate checks; the entire envelope is not guaranteed to be realizable 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）：0.6350–0.7850Known-element contribution; incomplete value; missing Mo, V, B; coupled-element constraints require separate checks; the entire envelope is not guaranteed to be realizable 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：0.6600–0.8200Known-element contribution; incomplete value; missing Mo; coupled-element constraints require separate checks; the entire envelope is not guaranteed to be realizable 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.
By agreement between the parties: only the Cr limit is relaxed to Cr≤0.30%; Ni+Cr≤0.35%
IIW / CEV：0.7000–0.9433Known-element contribution; incomplete value; missing Mo, V; coupled-element constraints require separate checks; the entire envelope is not guaranteed to be realizable 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）：0.6350–0.7900Known-element contribution; incomplete value; missing Mo, V, B; coupled-element constraints require separate checks; the entire envelope is not guaranteed to be realizable 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：0.6600–0.8250Known-element contribution; incomplete value; missing Mo; coupled-element constraints require separate checks; the entire envelope is not guaranteed to be realizable 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.
By agreement between the parties: only the combined Ni+Cr limit is relaxed; Ni+Cr≤0.45%
IIW / CEV：0.7000–0.9233Known-element contribution; incomplete value; missing Mo, V; coupled-element constraints require separate checks; the entire envelope is not guaranteed to be realizable 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）：0.6350–0.7850Known-element contribution; incomplete value; missing Mo, V, B; coupled-element constraints require separate checks; the entire envelope is not guaranteed to be realizable 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：0.6600–0.8200Known-element contribution; incomplete value; missing Mo; coupled-element constraints require separate checks; the entire envelope is not guaranteed to be realizable 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.
By agreement between the parties: Cr and the combined Ni+Cr limits are relaxed; Ni+Cr≤0.45%
IIW / CEV：0.7000–0.9433Known-element contribution; incomplete value; missing Mo, V; coupled-element constraints require separate checks; the entire envelope is not guaranteed to be realizable 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）：0.6350–0.7900Known-element contribution; incomplete value; missing Mo, V, B; coupled-element constraints require separate checks; the entire envelope is not guaranteed to be realizable 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：0.6600–0.8250Known-element contribution; incomplete value; missing Mo; coupled-element constraints require separate checks; the entire envelope is not guaranteed to be realizable 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 | 0.6 ～ 0.7 |
| Si | 0.15 ～ 0.35 |
| Mn | 0.6 ～ 0.9 |
| P | ≤ 0.03 (lower limit not stated) |
| S | ≤ 0.035 (lower limit not stated) |
| Ni | ≤ 0.2 (lower limit not stated) |
| Cr | ≤ 0.2 (lower limit not stated) |
| Cu | ≤ 0.3 (lower limit not stated) |
Applicability and limitations
Heat-analysis mass fractions wt%; Product-analysis tolerances follow JIS G0321, Table 3 separately. ; Widening the combined maximum for Cr≤0.30% and Ni+Cr requires agreement between both parties; conditions are selected separately; The individual Ni limit ≤0.20% is not widened by this provision. ; Alloying elements not listed in the table must not be intentionally added except to finish steelmaking; Unspecified values must not be treated as zero in calculations. ; Annex JB applies only to plate and strip; This must not be directly treated as a cold-heading wire product.
Combined limits
- Element-sum limits
- Elements concerned
- Ni
- Cr
- Upper limit
- 0.35
Original condition-branch records
Table limits; Ni+Cr≤0.35%
| Element | Composition requirement |
|---|---|
| C | 0.6 ～ 0.7 |
| Si | 0.15 ～ 0.35 |
| Mn | 0.6 ～ 0.9 |
| P | ≤ 0.03 (lower limit not stated) |
| S | ≤ 0.035 (lower limit not stated) |
| Ni | ≤ 0.2 (lower limit not stated) |
| Cr | ≤ 0.2 (lower limit not stated) |
| Cu | ≤ 0.3 (lower limit not stated) |
- Combined limits
- Element-sum limits
- Elements concerned
- Ni
- Cr
- Upper limit
- 0.35
By agreement between the parties: only the Cr limit is relaxed to Cr≤0.30%; Ni+Cr≤0.35%
| Element | Composition requirement |
|---|---|
| C | 0.6 ～ 0.7 |
| Si | 0.15 ～ 0.35 |
| Mn | 0.6 ～ 0.9 |
| P | ≤ 0.03 (lower limit not stated) |
| S | ≤ 0.035 (lower limit not stated) |
| Ni | ≤ 0.2 (lower limit not stated) |
| Cr | ≤ 0.3 (lower limit not stated) |
| Cu | ≤ 0.3 (lower limit not stated) |
- Combined limits
- Element-sum limits
- Elements concerned
- Ni
- Cr
- Upper limit
- 0.35
By agreement between the parties: only the combined Ni+Cr limit is relaxed; Ni+Cr≤0.45%
| Element | Composition requirement |
|---|---|
| C | 0.6 ～ 0.7 |
| Si | 0.15 ～ 0.35 |
| Mn | 0.6 ～ 0.9 |
| P | ≤ 0.03 (lower limit not stated) |
| S | ≤ 0.035 (lower limit not stated) |
| Ni | ≤ 0.2 (lower limit not stated) |
| Cr | ≤ 0.2 (lower limit not stated) |
| Cu | ≤ 0.3 (lower limit not stated) |
- Combined limits
- Element-sum limits
- Elements concerned
- Ni
- Cr
- Upper limit
- 0.45
By agreement between the parties: Cr and the combined Ni+Cr limits are relaxed; Ni+Cr≤0.45%
| Element | Composition requirement |
|---|---|
| C | 0.6 ～ 0.7 |
| Si | 0.15 ～ 0.35 |
| Mn | 0.6 ～ 0.9 |
| P | ≤ 0.03 (lower limit not stated) |
| S | ≤ 0.035 (lower limit not stated) |
| Ni | ≤ 0.2 (lower limit not stated) |
| Cr | ≤ 0.3 (lower limit not stated) |
| Cu | ≤ 0.3 (lower limit not stated) |
- Combined limits
- Element-sum limits
- Elements concerned
- Ni
- Cr
- Upper limit
- 0.45
A condition branch must be selected
YesVerification notes
Verified original Japanese Table 2 and normative Annex JB (2023)S65C · JIS G 4051-2016
Chemical composition source verified; this does not verify every standard clause, actual supply or measured heat results
- Material form
- Plate, sheet and strip only
- Original record status
- Original standard verified
- Standard edition
- JIS G 4051-2016
- Table / clause
- Normative Annex JB, Table JB.1 and note a/b
- PDF page references
- 1、6、18
Carbon-equivalent reference
Estimates are presented separately for each applicable composition condition. Match the actual ordering conditions; ranges must not be combined.
Cr≤0.20%；Ni+Cr≤0.35%
IIW / CEV：0.7000–0.9233Known-element contribution; incomplete value; missing Mo, V; coupled-element constraints require separate checks; the entire envelope is not guaranteed to be realizable 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）：0.6350–0.7850Known-element contribution; incomplete value; missing Mo, V, B; coupled-element constraints require separate checks; the entire envelope is not guaranteed to be realizable 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：0.6600–0.8200Known-element contribution; incomplete value; missing Mo; coupled-element constraints require separate checks; the entire envelope is not guaranteed to be realizable 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.
By agreement between the parties: Cr<0.30%; Ni+Cr≤0.35%
IIW / CEV：0.7000–0.9433Known-element contribution; incomplete value; missing Mo, V; coupled-element constraints require separate checks; the entire envelope is not guaranteed to be realizable 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）：0.6350–0.7900Known-element contribution; incomplete value; missing Mo, V, B; coupled-element constraints require separate checks; the entire envelope is not guaranteed to be realizable 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：0.6600–0.8250Known-element contribution; incomplete value; missing Mo; coupled-element constraints require separate checks; the entire envelope is not guaranteed to be realizable 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.
Cr≤0.20%；Ni+Cr<0.45%
IIW / CEV：0.7000–0.9233Known-element contribution; incomplete value; missing Mo, V; coupled-element constraints require separate checks; the entire envelope is not guaranteed to be realizable 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）：0.6350–0.7850Known-element contribution; incomplete value; missing Mo, V, B; coupled-element constraints require separate checks; the entire envelope is not guaranteed to be realizable 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：0.6600–0.8200Known-element contribution; incomplete value; missing Mo; coupled-element constraints require separate checks; the entire envelope is not guaranteed to be realizable 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.
By agreement between the parties: Cr<0.30%; Ni+Cr<0.45%
IIW / CEV：0.7000–0.9433Known-element contribution; incomplete value; missing Mo, V; coupled-element constraints require separate checks; the entire envelope is not guaranteed to be realizable 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）：0.6350–0.7900Known-element contribution; incomplete value; missing Mo, V, B; coupled-element constraints require separate checks; the entire envelope is not guaranteed to be realizable 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：0.6600–0.8250Known-element contribution; incomplete value; missing Mo; coupled-element constraints require separate checks; the entire envelope is not guaranteed to be realizable 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 | 0.6 ～ 0.7 |
| Si | 0.15 ～ 0.35 |
| Mn | 0.6 ～ 0.9 |
| P | ≤ 0.03 (lower limit not stated) |
| S | ≤ 0.035 (lower limit not stated) |
| Ni | ≤ 0.2 (lower limit not stated) |
| Cr | ≤ 0.2 (lower limit not stated) |
| Cu | ≤ 0.3 (lower limit not stated) |
Applicability and limitations
JSA official English version JIS G4051:2016, line-by-line visual verification of cover and original composition table; Mass fraction wt%, heat analysis. ; Note a: The agreed Cr limit is strictly less than 0.30%.; Note b: The agreed Ni+Cr combined limit is strictly less than 0.45%; do not treat it as less than or equal to.; The two agreements are selected independently. ; If product analysis is agreed by both parties, apply the deviations in JIS G0321 Table 3 separately; do not automatically add them to the default heat-analysis range.. ; Elements not listed shall not be intentionally added except additions needed to finish steelmaking; An unspecified limit does not mean that the content is zero.. ; This record is based solely on the 2016 edition; it does not claim that compositions of other editions are identical or have been verified. ; Normative Annex JB applies only to hot-rolled or cold-rolled plate, sheet and strip; it does not automatically establish a cold-heading wire/wire rod product..
Combined limits
- Element-sum limits
- Elements concerned
- Ni
- Cr
- Upper limit
- 0.35
Original condition-branch records
Cr≤0.20%；Ni+Cr≤0.35%
| Element | Composition requirement |
|---|---|
| C | 0.6 ～ 0.7 |
| Si | 0.15 ～ 0.35 |
| Mn | 0.6 ～ 0.9 |
| P | ≤ 0.03 (lower limit not stated) |
| S | ≤ 0.035 (lower limit not stated) |
| Ni | ≤ 0.2 (lower limit not stated) |
| Cr | ≤ 0.2 (lower limit not stated) |
| Cu | ≤ 0.3 (lower limit not stated) |
- Combined limits
- Element-sum limits
- Elements concerned
- Ni
- Cr
- Upper limit
- 0.35
By agreement between the parties: Cr<0.30%; Ni+Cr≤0.35%
| Element | Composition requirement |
|---|---|
| C | 0.6 ～ 0.7 |
| Si | 0.15 ～ 0.35 |
| Mn | 0.6 ～ 0.9 |
| P | ≤ 0.03 (lower limit not stated) |
| S | ≤ 0.035 (lower limit not stated) |
| Ni | ≤ 0.2 (lower limit not stated) |
| Cr | <0.3 (lower limit not stated) |
| Cu | ≤ 0.3 (lower limit not stated) |
- Combined limits
- Element-sum limits
- Elements concerned
- Ni
- Cr
- Upper limit
- 0.35
Cr≤0.20%；Ni+Cr<0.45%
| Element | Composition requirement |
|---|---|
| C | 0.6 ～ 0.7 |
| Si | 0.15 ～ 0.35 |
| Mn | 0.6 ～ 0.9 |
| P | ≤ 0.03 (lower limit not stated) |
| S | ≤ 0.035 (lower limit not stated) |
| Ni | ≤ 0.2 (lower limit not stated) |
| Cr | ≤ 0.2 (lower limit not stated) |
| Cu | ≤ 0.3 (lower limit not stated) |
- Combined limits
- Element-sum limits
- Elements concerned
- Ni
- Cr
- Upper limit
- 0.45
- Upper bound excluded
- Yes
By agreement between the parties: Cr<0.30%; Ni+Cr<0.45%
| Element | Composition requirement |
|---|---|
| C | 0.6 ～ 0.7 |
| Si | 0.15 ～ 0.35 |
| Mn | 0.6 ～ 0.9 |
| P | ≤ 0.03 (lower limit not stated) |
| S | ≤ 0.035 (lower limit not stated) |
| Ni | ≤ 0.2 (lower limit not stated) |
| Cr | <0.3 (lower limit not stated) |
| Cu | ≤ 0.3 (lower limit not stated) |
- Combined limits
- Element-sum limits
- Elements concerned
- Ni
- Cr
- Upper limit
- 0.45
- Upper bound excluded
- Yes