Post Stock Login Register

GB/T 3077 40CrMn vs BS 970 (Part 3) 530M40

Strong Match — 87% match based on chemical composition and mechanical property overlap.

GB/T 3077 40CrMn (GB/T 3077:2015) and BS 970 (Part 3) 530M40 (BS 970 (Part 3):1991) 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 3) 530M40 is commonly used for bright cold finished bars (cold drawn, turned or precision ground) for general engineering purposes, in straight lengths; alloy direct hardening steel (table 16). GB/T 3077 40CrMn is defined under Guobiao Standards (GB/T), originating from China, while BS 970 (Part 3) 530M40 is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, GB/T 3077 40CrMn vs BS 970 (Part 3) 530M40 is a 87% match. Mechanical property data is not available for both grades, so this factor could not be scored. Combined, this makes them a strong match overall at 87%.

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
87%
MECHANICAL MATCH
No shared data
OVERALL
87%
Specifications
Property GB/T 3077 40CrMn BS 970 (Part 3) 530M40
Standard GB/T 3077:2015 BS 970 (Part 3):1991
Category Alloy Steel Alloy Steel
C (%) 0.37-0.45 0.36-0.44
Si (%) 0.17-0.37 0.10-0.40
Mn (%) 0.90-1.20 0.60-0.90
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 3) 530M40
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 3) 530M40
Bright cold finished bars (cold drawn, turned or precision ground) for general engineering purposes, in straight lengths; alloy direct hardening steel (Table 16)
Key Differences
Can GB/T 3077 40CrMn Be Substituted With BS 970 (Part 3) 530M40?
GB/T 3077 40CrMn and BS 970 (Part 3) 530M40 overlap closely enough on chemistry and mechanical properties that BS 970 (Part 3) 530M40 is often considered as a substitute for GB/T 3077 40CrMn in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.
On M-EX Right Now
GB/T 3077 40CrMn
0 active listings and RFQs →
BS 970 (Part 3) 530M40
0 active listings and RFQs →
Frequently Asked Questions
What is the difference between GB/T 3077 40CrMn and BS 970 (Part 3) 530M40?
GB/T 3077 40CrMn specifies Cu which is not specified for BS 970 (Part 3) 530M40.
Can GB/T 3077 40CrMn be substituted with BS 970 (Part 3) 530M40?
GB/T 3077 40CrMn and BS 970 (Part 3) 530M40 overlap closely enough on chemistry and mechanical properties that BS 970 (Part 3) 530M40 is often considered as a substitute for GB/T 3077 40CrMn in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.