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30CRMNSINI2A

5 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 30CRMNSINI2A →

30CrMnSiNi2A · GB/T 38809-2020

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

Material category
Nickel and nickel alloys
Subcategory
Alloy steel
Material form
Reference record
Original record status
Original standard verified
Standard edition
GB/T 38809-2020
Table / clause
Table 2 and notes a/b and 5.1.1
PDF page references
1、5

Carbon-equivalent reference

IIW / CEV：0.7100–0.9433Known-element contribution; incomplete value; missing 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）：0.4217–0.5433Known-element contribution; incomplete value; missing 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：0.4500–0.5850 Independent-element envelope of standard ranges, not measured heat results; coupled-element constraints require separate checks, and 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

ElementComposition requirement
C0.27 ～ 0.33
Si1.0 ～ 1.2
Mn1.0 ～ 1.2
P≤ 0.015 (lower limit not stated)
S≤ 0.01 (lower limit not stated)
Cr0.9 ～ 1.2
Ni1.4 ～ 1.8
Mo≤ 0.2 (lower limit not stated)
Cu≤ 0.2 (lower limit not stated)
W≤ 0.2 (lower limit not stated)
Ti≤ 0.03 (lower limit not stated)

Applicability and limitations

Official GB/T38809-2020 cover PDF1, PDF5 Table 2 and footnote a/b, heat-analysis mass fractions wt%. ; Product-analysis tolerances follow Table 3 and GB/T222 separately; they are not added to the default heat-analysis range. ; Steel-bar application, steelmaking, delivery condition, specimen heat treatment and mechanical requirements must be confirmed separately; This does not automatically establish a cold-heading product or supply guarantee. ; Note a S+P≤.021%; Meeting P≤.015/S≤.010 individually may still result in a combined total exceeding the limit. ; V 0.10 is the calculated addition under note b; measured values must be reported, and it is not an assessment limit; Reverse lookup and standard-range carbon-equivalent calculations must not treat 0.10 as a fixed value or upper limit.

Combined limits

Element-sum limits
  • Elements concerned
    • S
    • P
    Upper limit
    0.021

Verification notes

The cover, all 7 grades in Table 2 and footnotes in the official original text were visually checked

30CrMnSiNi2A · GB/T 38809-2020

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

Material category
Nickel and nickel alloys
Subcategory
Alloy steel
Material form
Reference record
Original record status
Original standard verified
Standard edition
GB/T 38809-2020
Table / clause
Table 2 and notes a/b and 5.1.1
PDF page references
1、5

Carbon-equivalent reference

IIW / CEV：0.7100–0.9433Known-element contribution; incomplete value; missing 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）：0.4217–0.5433Known-element contribution; incomplete value; missing 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：0.4500–0.5850 Independent-element envelope of standard ranges, not measured heat results; coupled-element constraints require separate checks, and 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

ElementComposition requirement
C0.27 ～ 0.33
Si1.0 ～ 1.2
Mn1.0 ～ 1.2
P≤ 0.015 (lower limit not stated)
S≤ 0.01 (lower limit not stated)
Cr0.9 ～ 1.2
Ni1.4 ～ 1.8
Mo≤ 0.2 (lower limit not stated)
Cu≤ 0.2 (lower limit not stated)
W≤ 0.2 (lower limit not stated)
Ti≤ 0.03 (lower limit not stated)

Applicability and limitations

Official GB/T38809-2020 cover PDF1, PDF5 Table 2 and footnote a/b, heat-analysis mass fractions wt%. ; Product-analysis tolerances follow Table 3 and GB/T222 separately; they are not added to the default heat-analysis range. ; Steel-bar application, steelmaking, delivery condition, specimen heat treatment and mechanical requirements must be confirmed separately; This does not automatically establish a cold-heading product or supply guarantee. ; Note a S+P≤.021%; Meeting P≤.015/S≤.010 individually may still result in a combined total exceeding the limit. ; V 0.10 is the calculated addition under note b; measured values must be reported, and it is not an assessment limit; Reverse lookup and standard-range carbon-equivalent calculations must not treat 0.10 as a fixed value or upper limit.

Combined limits

Element-sum limits
  • Elements concerned
    • S
    • P
    Upper limit
    0.021

Verification notes

The cover, all 7 grades in Table 2 and footnotes in the official original text were visually checked

30CrMnSiNi2A · GB/T 38809-2020

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

Material form
Reference record
Original record status
Original standard verified
Standard edition
GB/T 38809-2020
Table / clause
Table 2 and notes a/b and 5.1.1
PDF page references
1、5

Carbon-equivalent reference

IIW / CEV：0.7100–0.9433Known-element contribution; incomplete value; missing 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）：0.4217–0.5433Known-element contribution; incomplete value; missing 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：0.4500–0.5850 Independent-element envelope of standard ranges, not measured heat results; coupled-element constraints require separate checks, and 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

ElementComposition requirement
C0.27 ～ 0.33
Si1.0 ～ 1.2
Mn1.0 ～ 1.2
P≤ 0.015 (lower limit not stated)
S≤ 0.01 (lower limit not stated)
Cr0.9 ～ 1.2
Ni1.4 ～ 1.8
Mo≤ 0.2 (lower limit not stated)
Cu≤ 0.2 (lower limit not stated)
W≤ 0.2 (lower limit not stated)
Ti≤ 0.03 (lower limit not stated)

Applicability and limitations

Official GB/T38809-2020 cover PDF1, PDF5 Table 2 and footnote a/b, heat-analysis mass fractions wt%. ; Product-analysis tolerances follow Table 3 and GB/T222 separately; they are not added to the default heat-analysis range. ; Steel-bar application, steelmaking, delivery condition, specimen heat treatment and mechanical requirements must be confirmed separately; This does not automatically establish a cold-heading product or supply guarantee. ; Note a S+P≤.021%; Meeting P≤.015/S≤.010 individually may still result in a combined total exceeding the limit. ; V 0.10 is the calculated addition under note b; measured values must be reported, and it is not an assessment limit; Reverse lookup and standard-range carbon-equivalent calculations must not treat 0.10 as a fixed value or upper limit.

Combined limits

Element-sum limits
  • Elements concerned
    • S
    • P
    Upper limit
    0.021

Verification notes

The cover, all 7 grades in Table 2 and footnotes in the official original text were visually checked

30CrMnSiNi2A · GB /T 3079-1993

Original-source verification is incomplete; this is not a formal standard reference

Material category
Alloy steel
Subcategory
Alloy steel
Material form
Reference record
Verification status
Reference data; original source not verified

Carbon-equivalent reference

IIW / CEV: composition source not verified; standard-range carbon equivalent is not calculated
Pcm (Ito–Bessyo): composition source not verified; standard-range carbon equivalent is not calculated
CET: composition source not verified; standard-range carbon equivalent is not calculated

Composition

ElementComposition requirement
C0.27 ～ 0.34
Cr0.9 ～ 1.2
Cu≤ 0.25 (lower limit not stated)
Mn1 ～ 1.3
Ni1.4 ～ 1.8
P≤ 0.025 (lower limit not stated)
S≤ 0.025 (lower limit not stated)
Si0.9 ～ 1.2

Applicability and limitations

A match in the materials database does not establish suitability for cold heading or guarantee finished-product strength. Confirmation must consider wire condition, deformation, heat treatment and tests on actual parts.

30CrMnSiNi2A · GJB 1951-1994

Original-source verification is incomplete; this is not a formal standard reference

Material category
Alloy steel
Subcategory
Alloy steel
Material form
Reference record
Verification status
Reference data; original source not verified

Carbon-equivalent reference

IIW / CEV: composition source not verified; standard-range carbon equivalent is not calculated
Pcm (Ito–Bessyo): composition source not verified; standard-range carbon equivalent is not calculated
CET: composition source not verified; standard-range carbon equivalent is not calculated

Composition

ElementComposition requirement
C0.27 ～ 0.34
Cr0.9 ～ 1.2
Mn1 ～ 1.3
Ni1.4 ～ 1.8
P≤ 0.025 (lower limit not stated)
S≤ 0.025 (lower limit not stated)
Si0.9 ～ 1.2

Applicability and limitations

A match in the materials database does not establish suitability for cold heading or guarantee finished-product strength. Confirmation must consider wire condition, deformation, heat treatment and tests on actual parts.

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