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BS 970 EN111A vs GB/T 3077 40CrNi

Close Alternative — 81.1% match based on chemical composition and mechanical property overlap.

BS 970 EN111A (BS 970:1955) and GB/T 3077 40CrNi (GB/T 3077:2015) are both steel grades. Both fall under the Alloy Steel category. BS 970 EN111A is defined under British Standards (BS), originating from United Kingdom, while GB/T 3077 40CrNi is defined under Guobiao Standards (GB/T), originating from China.

As per chemical composition, BS 970 EN111A vs GB/T 3077 40CrNi is a 81.1% match. Mechanical property data is not available for both grades, so this factor could not be scored. Combined, this makes them a close alternative overall at 81.1%.

Frequently Compared With BS 970 EN111A:
IS 11169 (Part 1) 10Ni5Cr4 IS 1570 (Part 4) 103Cr4 IS 1570 (Part 4) 10Cr20Mo6 IS 4367 07Cr4Mo6 IS 1570 (Part 4) 07Cr4Mo6 NF A35-565 100C6 UNI 11234 100Cr6 IS 1570 (Part 4) 103Cr6 IS 1570 (Part 4) 105Cr5 IS 1570 (Part 7) 10Cr36Mo10H IS 4367 10Cr9Mo10 IS 1570 (Part 4) 10Mo6
Match Breakdown
CHEMISTRY MATCH
81.1%
MECHANICAL MATCH
No shared data
OVERALL
81.1%
Specifications
Property BS 970 EN111A GB/T 3077 40CrNi
Standard BS 970:1955 GB/T 3077:2015
Category Alloy Steel Alloy Steel
C (%) 0.33-0.38 0.37-0.44
Si (%) 0.10-0.35 0.17-0.37
Mn (%) 0.60-0.90 0.50-0.80
Ni (%) 1.00-1.50 1.00-1.40
Cr (%) 0.45-0.75 0.45-0.75
S (%) <=0.050 <=0.030
P (%) <=0.050 <=0.030
Cu (%) Not specified <=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 BS 970 EN111A GB/T 3077 40CrNi
Tensile Strength Not specified >=980 MPa
Yield Strength Not specified >=785 MPa
Elongation Not specified >=10%
Hardness Not specified <=241 HB
Condition Not specified Quenched and tempered, test sample 25 mm; hardness is for bars delivered annealed or high temperature tempered
Typical Applications
BS 970 EN111A
Not documented
GB/T 3077 40CrNi
Hot-rolled or forged structural alloy steel bars
Key Differences
Can BS 970 EN111A Be Substituted With GB/T 3077 40CrNi?
BS 970 EN111A and GB/T 3077 40CrNi are a close alternative rather than a direct substitute. Some properties overlap well, but check the specific chemistry and mechanical rows above against your application's requirements before treating them as interchangeable.
On M-EX Right Now
BS 970 EN111A
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GB/T 3077 40CrNi
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Frequently Asked Questions
What is the difference between BS 970 EN111A and GB/T 3077 40CrNi?
GB/T 3077 40CrNi specifies Cu which is not specified for BS 970 EN111A.
Can BS 970 EN111A be substituted with GB/T 3077 40CrNi?
BS 970 EN111A and GB/T 3077 40CrNi are a close alternative rather than a direct substitute. Some properties overlap well, but check the specific chemistry and mechanical rows above against your application's requirements before treating them as interchangeable.