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GB/T 3077 30Cr2Ni2Mo vs GB/T 3077 40CrNiMo

Related Material — 68.8% match based on chemical composition and mechanical property overlap.

GB/T 3077 30Cr2Ni2Mo (GB/T 3077:2015) and GB/T 3077 40CrNiMo (GB/T 3077:2015) are both steel grades. Both fall under the Alloy Steel category. GB/T 3077 30Cr2Ni2Mo is typically used for hot-rolled or forged structural alloy steel bars, while GB/T 3077 40CrNiMo is commonly used for hot-rolled or forged structural alloy steel bars. GB/T 3077 30Cr2Ni2Mo is defined under Guobiao Standards (GB/T), originating from China, while GB/T 3077 40CrNiMo is defined under Guobiao Standards (GB/T), originating from China.

As per chemical composition, GB/T 3077 30Cr2Ni2Mo vs GB/T 3077 40CrNiMo is a 65.7% match. As per mechanical properties, the match is 75%. Combined, this makes them a related material overall at 68.8%.

Frequently Compared With GB/T 3077 30Cr2Ni2Mo:
IS 1570 (Part 7) 10Mo6H IS 4367 07Cr4Mo6 IS 1570 (Part 4) 07Cr4Mo6 NF A35-565 100C6 UNI 11234 100Cr6 IS 1570 (Part 4) 103Cr4 IS 1570 (Part 4) 103Cr6 IS 1570 (Part 4) 105Cr5 IS 1570 (Part 4) 10Cr20Mo6 IS 1570 (Part 7) 10Cr36Mo10H IS 4367 10Cr9Mo10 EN 10028-2 10CrMo9-10
Match Breakdown
CHEMISTRY MATCH
65.7%
MECHANICAL MATCH
75%
OVERALL
68.8%
Specifications
Property GB/T 3077 30Cr2Ni2Mo GB/T 3077 40CrNiMo
Standard GB/T 3077:2015 GB/T 3077:2015
Category Alloy Steel Alloy Steel
C (%) 0.26-0.34 0.37-0.44
Si (%) 0.17-0.37 0.17-0.37
Mn (%) 0.50-0.80 0.50-0.80
Cr (%) 1.80-2.20 0.60-0.90
Mo (%) 0.30-0.50 0.15-0.25
Ni (%) 1.80-2.20 1.25-1.65
P (%) <=0.030 <=0.030
S (%) <=0.030 <=0.030
Cu (%) <=0.30 <=0.30
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property GB/T 3077 30Cr2Ni2Mo GB/T 3077 40CrNiMo
Tensile Strength >=980 MPa >=980 MPa
Yield Strength >=835 MPa >=835 MPa
Elongation >=10% >=12%
Hardness <=269 HB <=269 HB
Condition Quenched and tempered, test sample 25 mm; hardness is for bars delivered annealed or high temperature tempered Quenched and tempered, test sample 25 mm; hardness is for bars delivered annealed or high temperature tempered
Typical Applications
GB/T 3077 30Cr2Ni2Mo
Hot-rolled or forged structural alloy steel bars
GB/T 3077 40CrNiMo
Hot-rolled or forged structural alloy steel bars
Can GB/T 3077 30Cr2Ni2Mo Be Substituted With GB/T 3077 40CrNiMo?
GB/T 3077 30Cr2Ni2Mo and GB/T 3077 40CrNiMo share some compositional similarity but differ enough that substitution should not be assumed. Review the differences above carefully, and consult the applicable standard or a metallurgist before using one in place of the other.
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GB/T 3077 30Cr2Ni2Mo
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GB/T 3077 40CrNiMo
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Frequently Asked Questions
What is the difference between GB/T 3077 30Cr2Ni2Mo and GB/T 3077 40CrNiMo?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can GB/T 3077 30Cr2Ni2Mo be substituted with GB/T 3077 40CrNiMo?
GB/T 3077 30Cr2Ni2Mo and GB/T 3077 40CrNiMo share some compositional similarity but differ enough that substitution should not be assumed. Review the differences above carefully, and consult the applicable standard or a metallurgist before using one in place of the other.