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GB/T 3077 37CrNi3 vs BS 970 EN111A

Related Material — 66.3% match based on chemical composition and mechanical property overlap.

GB/T 3077 37CrNi3 (GB/T 3077:2015) and BS 970 EN111A (BS 970:1955) are both steel grades. Both fall under the Alloy Steel category. GB/T 3077 37CrNi3 is defined under Guobiao Standards (GB/T), originating from China, while BS 970 EN111A is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, GB/T 3077 37CrNi3 vs BS 970 EN111A is a 66.3% match. Mechanical property data is not available for both grades, so this factor could not be scored. Combined, this makes them a related material overall at 66.3%.

Frequently Compared With GB/T 3077 37CrNi3:
GB/T 3077 12Cr2Ni4 IS 1570 (Part 4) 07Cr4Mo6 NF A35-565 100C6 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 IS 1570 (Part 4) 10Mo6 IS 4367 07Cr4Mo6
Match Breakdown
CHEMISTRY MATCH
66.3%
MECHANICAL MATCH
No shared data
OVERALL
66.3%
Specifications
Property GB/T 3077 37CrNi3 BS 970 EN111A
Standard GB/T 3077:2015 BS 970:1955
Category Alloy Steel Alloy Steel
C (%) 0.34-0.41 0.33-0.38
Si (%) 0.17-0.37 0.10-0.35
Mn (%) 0.30-0.60 0.60-0.90
Cr (%) 1.20-1.60 0.45-0.75
Ni (%) 3.00-3.50 1.00-1.50
P (%) <=0.030 <=0.050
S (%) <=0.030 <=0.050
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 37CrNi3 BS 970 EN111A
Tensile Strength >=1130 MPa Not specified
Yield Strength >=980 MPa Not specified
Elongation >=10% Not specified
Hardness <=269 HB Not specified
Condition Quenched and tempered, test sample 25 mm; hardness is for bars delivered annealed or high temperature tempered Not specified
Typical Applications
GB/T 3077 37CrNi3
Hot-rolled or forged structural alloy steel bars
BS 970 EN111A
Not documented
Key Differences
Can GB/T 3077 37CrNi3 Be Substituted With BS 970 EN111A?
GB/T 3077 37CrNi3 and BS 970 EN111A 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 37CrNi3
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BS 970 EN111A
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Frequently Asked Questions
What is the difference between GB/T 3077 37CrNi3 and BS 970 EN111A?
GB/T 3077 37CrNi3 specifies Cu which is not specified for BS 970 EN111A.
Can GB/T 3077 37CrNi3 be substituted with BS 970 EN111A?
GB/T 3077 37CrNi3 and BS 970 EN111A 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.