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GB/T 3077 40CrNi vs BS 970 EN111A

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

GB/T 3077 40CrNi (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 40CrNi 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 40CrNi vs BS 970 EN111A 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 GB/T 3077 40CrNi:
UNI 11234 100Cr6 EN 10028-2 10CrMo9-10 IS 1570 (Part 4) 103Cr4 IS 1570 (Part 4) 10Mo6 IS 1570 (Part 7) 10Mo6H IS 4367 07Cr4Mo6 IS 1570 (Part 4) 07Cr4Mo6 NF A35-565 100C6 IS 1570 (Part 4) 103Cr6 IS 1570 (Part 4) 105Cr5 IS 1570 (Part 4) 10Cr20Mo6 IS 1570 (Part 7) 10Cr36Mo10H
Match Breakdown
CHEMISTRY MATCH
81.1%
MECHANICAL MATCH
No shared data
OVERALL
81.1%
Specifications
Property GB/T 3077 40CrNi BS 970 EN111A
Standard GB/T 3077:2015 BS 970:1955
Category Alloy Steel Alloy Steel
C (%) 0.37-0.44 0.33-0.38
Si (%) 0.17-0.37 0.10-0.35
Mn (%) 0.50-0.80 0.60-0.90
Cr (%) 0.45-0.75 0.45-0.75
Ni (%) 1.00-1.40 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 40CrNi BS 970 EN111A
Tensile Strength >=980 MPa Not specified
Yield Strength >=785 MPa Not specified
Elongation >=10% Not specified
Hardness <=241 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 40CrNi
Hot-rolled or forged structural alloy steel bars
BS 970 EN111A
Not documented
Key Differences
Can GB/T 3077 40CrNi Be Substituted With BS 970 EN111A?
GB/T 3077 40CrNi and BS 970 EN111A 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
GB/T 3077 40CrNi
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BS 970 EN111A
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Frequently Asked Questions
What is the difference between GB/T 3077 40CrNi and BS 970 EN111A?
GB/T 3077 40CrNi specifies Cu which is not specified for BS 970 EN111A.
Can GB/T 3077 40CrNi be substituted with BS 970 EN111A?
GB/T 3077 40CrNi and BS 970 EN111A 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.