G41420

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 G41420 →

G41420 · ASTM A29/A29M-2012

Chemical composition source verified; this does not verify every standard clause, actual supply or measured heat results

Material category: Alloy steel
Subcategory: Alloy steel
Material form: Reference record
Original record status: Original standard verified
Standard edition: ASTM A29/A29M-2012
Table / clause: Table 2 and Notes 1–4 and A

Carbon-equivalent reference

Estimates are presented separately for each applicable composition condition. Match the actual ordering conditions; ranges must not be combined.

Use the Si range specified in Table 2

IIW / CEV：0.7150–0.9267Known-element contribution; incomplete value; missing V 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）：0.4925–0.6050Known-element contribution; incomplete value; missing 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：0.5300–0.6538 Independent-element envelope of standard ranges; not measured heat-analysis values 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.

Purchaser specifies Si≤0.10%, Table 2 note A

Pcm（Ito–Bessyo）：0.4875–0.5967Known-element contribution; incomplete value; missing 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%.

Composition record (conditional branches apply; this is not an unconditional requirement)

Element	Composition requirement
C	0.4 ～ 0.45
Mn	0.75 ～ 1.0
P	≤ 0.035 (lower limit not stated)
S	≤ 0.04 (lower limit not stated)
Si	0.15 ～ 0.35
Cr	0.8 ～ 1.1
Mo	0.15 ～ 0.25
Cu	≤ 0.35 (lower limit not stated)
Ni	≤ 0.25 (lower limit not stated)

Applicability and limitations

Composition limits are per ASTM A29/A29M-2012 Table 2, and name correspondence is per SAE J404:2009 Table 1; The two standard bases are retained separately. ; Table 2 Note 1: residual Cu≤.35/Ni≤.25/Cr≤.20/Mo≤.06, applicable only to elements not specified as alloying elements.; Specified alloy range takes priority. ; The tabulated range for Si and the buyer-specified option of ≤.10 shall be retained separately; they shall not be forcibly applied simultaneously.. ; The range refers to heat analysis; permissible deviations for finished products shall be governed separately by Table 6.; G43406 is E4340 and cannot be merged as general 4340.

Original condition-branch records

Use the Si range specified in Table 2

Element	Composition requirement
C	0.4 ～ 0.45
Mn	0.75 ～ 1.0
P	≤ 0.035 (lower limit not stated)
S	≤ 0.04 (lower limit not stated)
Si	0.15 ～ 0.35
Cr	0.8 ～ 1.1
Mo	0.15 ～ 0.25
Cu	≤ 0.35 (lower limit not stated)
Ni	≤ 0.25 (lower limit not stated)

Purchaser specifies Si≤0.10%, Table 2 note A

Element	Composition requirement
C	0.4 ～ 0.45
Mn	0.75 ～ 1.0
P	≤ 0.035 (lower limit not stated)
S	≤ 0.04 (lower limit not stated)
Si	≤ 0.1 (lower limit not stated)
Cr	0.8 ～ 1.1
Mo	0.15 ～ 0.25
Cu	≤ 0.35 (lower limit not stated)
Ni	≤ 0.25 (lower limit not stated)

A condition branch must be selected

Yes

Verification notes

Original ASTM A29-2012 composition and SAE J404-2009 designation correspondence were checked separately

G41420 · ASTM A29/A29M-2020

Chemical composition source verified; this does not verify every standard clause, actual supply or measured heat results

Material category: Alloy steel
Subcategory: Alloy steel
Material form: Reference record
Original record status: Historical-edition reference
Standard edition: ASTM A29/A29M-2012
Table / clause: Table 2 and Notes 1–4 and A

Carbon-equivalent reference

Estimates are presented separately for each applicable composition condition. Match the actual ordering conditions; ranges must not be combined.

Use the Si range specified in Table 2

Purchaser specifies Si≤0.10%, Table 2 note A

Composition record (conditional branches apply; this is not an unconditional requirement)

Element	Composition requirement
C	0.4 ～ 0.45
Mn	0.75 ～ 1.0
P	≤ 0.035 (lower limit not stated)
S	≤ 0.04 (lower limit not stated)
Si	0.15 ～ 0.35
Cr	0.8 ～ 1.1
Mo	0.15 ～ 0.25
Cu	≤ 0.35 (lower limit not stated)
Ni	≤ 0.25 (lower limit not stated)

Applicability and limitations

The chemical composition currently shown is transcribed from the original ASTM A29/A29M-2012; The original record cites ASTM A29/A29M-2020; that original edition remains unavailable, and differences between editions have not been confirmed. Composition limits are per ASTM A29/A29M-2012 Table 2, and name correspondence is per SAE J404:2009 Table 1; The two standard bases are retained separately. ; Table 2 Note 1: residual Cu≤.35/Ni≤.25/Cr≤.20/Mo≤.06, applicable only to elements not specified as alloying elements.; Specified alloy range takes priority. ; The tabulated range for Si and the buyer-specified option of ≤.10 shall be retained separately; they shall not be forcibly applied simultaneously.. ; The range refers to heat analysis; permissible deviations for finished products shall be governed separately by Table 6.; G43406 is E4340 and cannot be merged as general 4340.

Original condition-branch records

Use the Si range specified in Table 2

Element	Composition requirement
C	0.4 ～ 0.45
Mn	0.75 ～ 1.0
P	≤ 0.035 (lower limit not stated)
S	≤ 0.04 (lower limit not stated)
Si	0.15 ～ 0.35
Cr	0.8 ～ 1.1
Mo	0.15 ～ 0.25
Cu	≤ 0.35 (lower limit not stated)
Ni	≤ 0.25 (lower limit not stated)

Purchaser specifies Si≤0.10%, Table 2 note A

Element	Composition requirement
C	0.4 ～ 0.45
Mn	0.75 ～ 1.0
P	≤ 0.035 (lower limit not stated)
S	≤ 0.04 (lower limit not stated)
Si	≤ 0.1 (lower limit not stated)
Cr	0.8 ～ 1.1
Mo	0.15 ～ 0.25
Cu	≤ 0.35 (lower limit not stated)
Ni	≤ 0.25 (lower limit not stated)

A condition branch must be selected

Yes

Verification notes

The current chemistry display uses original ASTM A29/A29M-2012 data. The source record is labeled ASTM A29/A29M-2020; that edition’s original text remains to be obtained, and edition differences have not been confirmed.

G41420 · ASTM A29/A29M-2023

Chemical composition source verified; this does not verify every standard clause, actual supply or measured heat results

Material category: Alloy steel
Subcategory: Alloy steel
Material form: Reference record
Original record status: Original standard verified
Standard edition: ASTM A29/A29M-2023
Table / clause: Table 2, notes 1–4 and footnote A

Carbon-equivalent reference

Estimates are presented separately for each applicable composition condition. Match the actual ordering conditions; ranges must not be combined.

Si 0.15–0.35% listed in Table 2

Purchaser specifies Si≤0.10%, Table 2 note A (requirement for severely cold-formed components)

Composition record (conditional branches apply; this is not an unconditional requirement)

Element	Composition requirement
C	0.4 ～ 0.45
Mn	0.75 ～ 1.0
Cr	0.8 ～ 1.1
Mo	0.15 ～ 0.25
P	≤ 0.035 (lower limit not stated)
S	≤ 0.04 (lower limit not stated)
Si	0.15 ～ 0.35
Cu	≤ 0.35 (lower limit not stated)
Ni	≤ 0.25 (lower limit not stated)

Applicability and limitations

Heat-analysis mass fractions wt%; See Table 6 for product analysis tolerances. ; Residual Cu ≤ 0.35%, Ni ≤ 0.25%, Cr ≤ 0.20%, Mo ≤ 0.06% apply only when the respective alloying element is not specified. ; The Si range listed in the table and the purchaser's specification of ≤ 0.10% are different conditions and shall not be applied simultaneously.

Original condition-branch records

Si 0.15–0.35% listed in Table 2

Element	Composition requirement
C	0.4 ～ 0.45
Mn	0.75 ～ 1.0
Cr	0.8 ～ 1.1
Mo	0.15 ～ 0.25
P	≤ 0.035 (lower limit not stated)
S	≤ 0.04 (lower limit not stated)
Si	0.15 ～ 0.35
Cu	≤ 0.35 (lower limit not stated)
Ni	≤ 0.25 (lower limit not stated)

Purchaser specifies Si≤0.10%, Table 2 note A (requirement for severely cold-formed components)

Element	Composition requirement
C	0.4 ～ 0.45
Mn	0.75 ～ 1.0
Cr	0.8 ～ 1.1
Mo	0.15 ～ 0.25
P	≤ 0.035 (lower limit not stated)
S	≤ 0.04 (lower limit not stated)
Si	≤ 0.1 (lower limit not stated)
Cu	≤ 0.35 (lower limit not stated)
Ni	≤ 0.25 (lower limit not stated)

A condition branch must be selected

Yes

Verification notes

Edition 2023, Table 2 was checked item by item; equivalence with a previous edition is not assumed