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BS 970 (Part 1) 655M13 vs GB/T 3077 12Cr2Ni4A

Close Alternative — 78.6% match based on chemical composition and mechanical property overlap.

BS 970 (Part 1) 655M13 (BS 970 (Part 1):1983) and GB/T 3077 12Cr2Ni4A (GB/T 3077-2015) are both steel grades. Both fall under the Alloy Steel category. BS 970 (Part 1) 655M13 is typically used for case hardening steel for mechanical and allied engineering purposes (table 11 mechanical properties)., while GB/T 3077 12Cr2Ni4A is commonly used for used for gears, shafts, pinions, aircraft parts, heavy-duty bearings, and transmission components.. BS 970 (Part 1) 655M13 is defined under British Standards (BS), originating from United Kingdom, while GB/T 3077 12Cr2Ni4A is defined under Guobiao Standards (GB/T), originating from China.

As per chemical composition, BS 970 (Part 1) 655M13 vs GB/T 3077 12Cr2Ni4A is a 78.6% 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 78.6%.

Frequently Compared With BS 970 (Part 1) 655M13:
IS 11169 (Part 1) 12Ni3Cr2 GOST 4543 12HN3A IS 1570 (Part 4) 07Cr4Mo6 IS 1570 (Part 4) 105Cr5 IS 1570 (Part 4) 103Cr4 IS 4367 07Cr4Mo6 IS 1570 (Part 4) 103Cr6 NF A35-565 100C6 IS 1570 (Part 4) 10Cr20Mo6 IS 1570 (Part 7) 10Cr36Mo10H IS 4367 10Cr9Mo10 IS 1570 (Part 4) 10Mo6
Match Breakdown
CHEMISTRY MATCH
78.6%
MECHANICAL MATCH
No shared data
OVERALL
78.6%
Specifications
Property BS 970 (Part 1) 655M13 GB/T 3077 12Cr2Ni4A
Standard BS 970 (Part 1):1983 GB/T 3077-2015
Category Alloy Steel Alloy Steel
C (%) 0.10-0.16 0.10-0.15
Mn (%) 0.35-0.60 0.30-0.60
Cr (%) 0.70-1.00 1.25-1.65
Ni (%) 3.00-3.75 3.25-3.75
P (%) <=0.035 0.025 max
S (%) <=0.040 0.025 max
Si (%) Not specified 0.17-0.37
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) 655M13 GB/T 3077 12Cr2Ni4A
Tensile Strength Not specified 980-1180 MPa
Yield Strength Not specified 785-980 MPa
Elongation Not specified 10-14%
Hardness Not specified 58-62 HRC (case)
Typical Applications
BS 970 (Part 1) 655M13
Case hardening steel for mechanical and allied engineering purposes (Table 11 mechanical properties).
GB/T 3077 12Cr2Ni4A
Used for gears, shafts, pinions, aircraft parts, heavy-duty bearings, and transmission components.
Key Differences
Can BS 970 (Part 1) 655M13 Be Substituted With GB/T 3077 12Cr2Ni4A?
BS 970 (Part 1) 655M13 and GB/T 3077 12Cr2Ni4A 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.
Forms & Sizes Available on M-EX
BS 970 (Part 1) 655M13
No active listings currently.
GB/T 3077 12Cr2Ni4A
Round Bar → (2 listings)
Diameter: 50–50 mm (1.97–1.97 in)
Length: 5000–6600 mm (196.85–259.84 in)
On M-EX Right Now
BS 970 (Part 1) 655M13
0 active listings and RFQs →
GB/T 3077 12Cr2Ni4A
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between BS 970 (Part 1) 655M13 and GB/T 3077 12Cr2Ni4A?
GB/T 3077 12Cr2Ni4A specifies Si which is not specified for BS 970 (Part 1) 655M13.
Can BS 970 (Part 1) 655M13 be substituted with GB/T 3077 12Cr2Ni4A?
BS 970 (Part 1) 655M13 and GB/T 3077 12Cr2Ni4A 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.