Post Stock Login Register

GB/T 3077 40CrMn vs BS 970 (Part 1) 530A40

Close Alternative — 81.9% match based on chemical composition and mechanical property overlap.

GB/T 3077 40CrMn (GB/T 3077:2015) and BS 970 (Part 1) 530A40 (BS 970 (Part 1):1983) are both steel grades. Both fall under the Alloy Steel category. GB/T 3077 40CrMn is typically used for hot-rolled or forged structural alloy steel bars, while BS 970 (Part 1) 530A40 is commonly used for through hardening steel for mechanical and allied engineering purposes; supplied in the hardened and tempered conditions of table 6.. GB/T 3077 40CrMn is defined under Guobiao Standards (GB/T), originating from China, while BS 970 (Part 1) 530A40 is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, GB/T 3077 40CrMn vs BS 970 (Part 1) 530A40 is a 81.9% 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 81.9%.

Frequently Compared With GB/T 3077 40CrMn:
IS 1570 (Part 4) 103Cr4 IS 1570 (Part 7) 10Mo6H IS 1570 (Part 4) 103Cr6 IS 1570 (Part 4) 10Cr20Mo6 IS 1570 (Part 7) 10Cr36Mo10H EN 10028-2 10CrMo9-10 IS 1570 (Part 4) 10Mo6 IS 4367 07Cr4Mo6 IS 1570 (Part 4) 07Cr4Mo6 NF A35-565 100C6 UNI 11234 100Cr6 IS 1570 (Part 4) 105Cr5
Match Breakdown
CHEMISTRY MATCH
81.9%
MECHANICAL MATCH
No shared data
OVERALL
81.9%
Specifications
Property GB/T 3077 40CrMn BS 970 (Part 1) 530A40
Standard GB/T 3077:2015 BS 970 (Part 1):1983
Category Alloy Steel Alloy Steel
C (%) 0.37-0.45 0.38-0.43
Si (%) 0.17-0.37 Not specified
Mn (%) 0.90-1.20 0.60-0.80
Cr (%) 0.90-1.20 0.90-1.20
P (%) <=0.030 <=0.035
S (%) <=0.030 <=0.040
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 40CrMn BS 970 (Part 1) 530A40
Tensile Strength >=980 MPa Not specified
Yield Strength >=835 MPa Not specified
Elongation >=9% Not specified
Hardness <=229 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 40CrMn
Hot-rolled or forged structural alloy steel bars
BS 970 (Part 1) 530A40
Through hardening steel for mechanical and allied engineering purposes; supplied in the hardened and tempered conditions of Table 6.
Key Differences
Can GB/T 3077 40CrMn Be Substituted With BS 970 (Part 1) 530A40?
GB/T 3077 40CrMn and BS 970 (Part 1) 530A40 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 40CrMn
0 active listings and RFQs →
BS 970 (Part 1) 530A40
0 active listings and RFQs →
Frequently Asked Questions
What is the difference between GB/T 3077 40CrMn and BS 970 (Part 1) 530A40?
GB/T 3077 40CrMn specifies Si, Cu which are not specified for BS 970 (Part 1) 530A40.
Can GB/T 3077 40CrMn be substituted with BS 970 (Part 1) 530A40?
GB/T 3077 40CrMn and BS 970 (Part 1) 530A40 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.