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GB/T 3077 25Cr2Mo1V vs ASTM A681 A4

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

GB/T 3077 25Cr2Mo1V (GB/T 3077:2015) and ASTM A681 A4 (ASTM A681:2008) are both steel grades. GB/T 3077 25Cr2Mo1V 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 25Cr2Mo1V 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 25Cr2Mo1V 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 25Cr2Mo1V vs ASTM A681 A4 is a 62.8% 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 25Cr2Mo1V:
IS 1570 (Part 4) 07Cr4Mo6 IS 1570 (Part 4) 103Cr6 IS 1570 (Part 4) 105Cr5 IS 1570 (Part 7) 10Cr36Mo10H EN 10028-2 10CrMo9-10 IS 1570 (Part 4) 10Mo6 IS 1570 (Part 7) 10Mo6H IS 4367 07Cr4Mo6 NF A35-565 100C6 UNI 11234 100Cr6 IS 1570 (Part 4) 103Cr4 IS 1570 (Part 4) 10Cr20Mo6
Match Breakdown
CHEMISTRY MATCH
62.8%
MECHANICAL MATCH
100%
OVERALL
65%
Specifications
Property GB/T 3077 25Cr2Mo1V 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 (%) 0.50-0.80 1.80-2.20
Cr (%) 2.10-2.50 0.90-2.20
Mo (%) 0.90-1.10 0.90-1.40
V (%) 0.30-0.50 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 25Cr2Mo1V ASTM A681 A4
Tensile Strength >=735 MPa Not specified
Yield Strength >=590 MPa Not specified
Elongation >=16% 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 25Cr2Mo1V
Hot-rolled or forged structural alloy steel bars
ASTM A681 A4
Tools, dies and fixtures (clause 1.2)
Key Differences
Can GB/T 3077 25Cr2Mo1V Be Substituted With ASTM A681 A4?
GB/T 3077 25Cr2Mo1V 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 25Cr2Mo1V
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ASTM A681 A4
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Frequently Asked Questions
What is the difference between GB/T 3077 25Cr2Mo1V and ASTM A681 A4?
Different category: GB/T 3077 25Cr2Mo1V is Alloy Steel, ASTM A681 A4 is Tool & Die Steels. GB/T 3077 25Cr2Mo1V specifies V, Cu which are not specified for ASTM A681 A4.
Can GB/T 3077 25Cr2Mo1V be substituted with ASTM A681 A4?
GB/T 3077 25Cr2Mo1V 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.