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GB/T 3077 25Cr2MoV vs ASTM A681 A4

Related Material — 65% match based on chemical composition and mechanical property overlap.

GB/T 3077 25Cr2MoV (GB/T 3077:2015) and ASTM A681 A4 (ASTM A681:2008) are both steel grades. GB/T 3077 25Cr2MoV is classified under Alloy Steel, while ASTM A681 A4 is classified under Tool & Die Steels — a different category, which is worth noting alongside the chemistry match below. GB/T 3077 25Cr2MoV is typically used for hot-rolled or forged structural alloy steel bars, while ASTM A681 A4 is commonly used for tools, dies and fixtures (clause 1.2). GB/T 3077 25Cr2MoV is defined under Guobiao Standards (GB/T), originating from China, while ASTM A681 A4 is defined under ASTM International, originating from United States.

As per chemical composition, GB/T 3077 25Cr2MoV vs ASTM A681 A4 is a 60.9% match. As per mechanical properties, the match is 100%. Combined, this makes them a related material overall at 65%.

Frequently Compared With GB/T 3077 25Cr2MoV:
GB/T 3077 12CrMoV 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
60.9%
MECHANICAL MATCH
100%
OVERALL
65%
Specifications
Property GB/T 3077 25Cr2MoV ASTM A681 A4
Standard GB/T 3077:2015 ASTM A681:2008
Category Alloy Steel Tool & Die Steels
C (%) 0.22-0.29 0.95-1.05
Si (%) 0.17-0.37 0.10-0.70
Mn (%) 0.40-0.70 1.80-2.20
Cr (%) 1.50-1.80 0.90-2.20
Mo (%) 0.25-0.35 0.90-1.40
V (%) 0.15-0.30 Not specified
P (%) <=0.030 <=0.030
S (%) <=0.030 <=0.030
Cu (%) <=0.30 Not specified
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 25Cr2MoV ASTM A681 A4
Tensile Strength >=930 MPa Not specified
Yield Strength >=785 MPa Not specified
Elongation >=14% Not specified
Hardness <=241 HB <=241 HB
Condition Quenched and tempered, test sample 25 mm; hardness is for bars delivered annealed or high temperature tempered Annealed (maximum Brinell hardness)
Typical Applications
GB/T 3077 25Cr2MoV
Hot-rolled or forged structural alloy steel bars
ASTM A681 A4
Tools, dies and fixtures (clause 1.2)
Key Differences
Can GB/T 3077 25Cr2MoV Be Substituted With ASTM A681 A4?
GB/T 3077 25Cr2MoV and ASTM A681 A4 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 25Cr2MoV
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ASTM A681 A4
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Frequently Asked Questions
What is the difference between GB/T 3077 25Cr2MoV and ASTM A681 A4?
Different category: GB/T 3077 25Cr2MoV is Alloy Steel, ASTM A681 A4 is Tool & Die Steels. GB/T 3077 25Cr2MoV specifies V, Cu which are not specified for ASTM A681 A4.
Can GB/T 3077 25Cr2MoV be substituted with ASTM A681 A4?
GB/T 3077 25Cr2MoV and ASTM A681 A4 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.