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BS 970 (Part 1) 905M39 vs GB/T 3077 38CrMoAl

Close Alternative — 81.7% match based on chemical composition and mechanical property overlap.

BS 970 (Part 1) 905M39 (BS 970 (Part 1):1983) and GB/T 3077 38CrMoAl (GB/T 3077:2015) are both steel grades. Both fall under the Alloy Steel category. BS 970 (Part 1) 905M39 is typically used for through hardening steel for mechanical and allied engineering purposes; supplied in the hardened and tempered conditions of table 6., while GB/T 3077 38CrMoAl is commonly used for hot-rolled or forged structural alloy steel bars. BS 970 (Part 1) 905M39 is defined under British Standards (BS), originating from United Kingdom, while GB/T 3077 38CrMoAl is defined under Guobiao Standards (GB/T), originating from China.

As per chemical composition, BS 970 (Part 1) 905M39 vs GB/T 3077 38CrMoAl is a 81.7% 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 81.7%.

Frequently Compared With BS 970 (Part 1) 905M39:
IS 1570 (Part 4) 103Cr6 IS 1570 (Part 4) 103Cr4 IS 1570 (Part 7) 10Cr36Mo10H IS 1570 (Part 4) 07Cr4Mo6 NF A35-565 100C6 IS 1570 (Part 4) 10Cr20Mo6 IS 1570 (Part 4) 10Mo6 IS 4367 07Cr4Mo6 UNI 11234 100Cr6 IS 1570 (Part 4) 105Cr5 IS 4367 10Cr9Mo10 IS 1570 (Part 7) 10Mo6H
Match Breakdown
CHEMISTRY MATCH
81.7%
MECHANICAL MATCH
No shared data
OVERALL
81.7%
Specifications
Property BS 970 (Part 1) 905M39 GB/T 3077 38CrMoAl
Standard BS 970 (Part 1):1983 GB/T 3077:2015
Category Alloy Steel Alloy Steel
C (%) 0.35-0.43 0.35-0.42
Mn (%) 0.40-0.65 0.30-0.60
P (%) <=0.025 <=0.030
S (%) <=0.025 <=0.030
Cr (%) 1.40-1.80 1.35-1.65
Mo (%) 0.15-0.25 0.15-0.25
Al (%) 0.90-1.30 0.70-1.10
Si (%) Not specified 0.20-0.45
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 (Part 1) 905M39 GB/T 3077 38CrMoAl
Tensile Strength Not specified >=980 MPa
Yield Strength Not specified >=835 MPa
Elongation Not specified >=14%
Hardness Not specified <=229 HB
Condition Not specified Quenched and tempered, test sample 30 mm; hardness is for bars delivered annealed or high temperature tempered
Typical Applications
BS 970 (Part 1) 905M39
Through hardening steel for mechanical and allied engineering purposes; supplied in the hardened and tempered conditions of Table 6.
GB/T 3077 38CrMoAl
Hot-rolled or forged structural alloy steel bars
Key Differences
Can BS 970 (Part 1) 905M39 Be Substituted With GB/T 3077 38CrMoAl?
BS 970 (Part 1) 905M39 and GB/T 3077 38CrMoAl 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 (Part 1) 905M39
0 active listings and RFQs →
GB/T 3077 38CrMoAl
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Frequently Asked Questions
What is the difference between BS 970 (Part 1) 905M39 and GB/T 3077 38CrMoAl?
GB/T 3077 38CrMoAl specifies Si, Cu which are not specified for BS 970 (Part 1) 905M39.
Can BS 970 (Part 1) 905M39 be substituted with GB/T 3077 38CrMoAl?
BS 970 (Part 1) 905M39 and GB/T 3077 38CrMoAl 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.