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BS 970 (Part 1) 655M13 vs GOST 4543 12HN3A

Close Alternative — 79.1% match based on chemical composition and mechanical property overlap.

BS 970 (Part 1) 655M13 (BS 970 (Part 1):1983) and GOST 4543 12HN3A (GOST 4543-2016) 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 GOST 4543 12HN3A is commonly used for used for gears, pinions, crankshafts, aircraft parts, and transmission components.. BS 970 (Part 1) 655M13 is defined under British Standards (BS) (United Kingdom).

As per chemical composition, BS 970 (Part 1) 655M13 vs GOST 4543 12HN3A is a 79.1% 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 79.1%.

Frequently Compared With BS 970 (Part 1) 655M13:
IS 11169 (Part 1) 12Ni3Cr2 IS 1570 (Part 4) 07Cr4Mo6 IS 1570 (Part 4) 105Cr5 GB/T 3077 12Cr2Ni4A IS 1570 (Part 4) 103Cr4 IS 4367 07Cr4Mo6 IS 1570 (Part 4) 103Cr6 IS 4367 10Cr9Mo10 NF A35-565 100C6 IS 1570 (Part 4) 10Cr20Mo6 IS 1570 (Part 7) 10Cr36Mo10H IS 1570 (Part 4) 10Mo6
Match Breakdown
CHEMISTRY MATCH
79.1%
MECHANICAL MATCH
No shared data
OVERALL
79.1%
Specifications
Property BS 970 (Part 1) 655M13 GOST 4543 12HN3A
Standard BS 970 (Part 1):1983 GOST 4543-2016
Category Alloy Steel Alloy Steel
C (%) 0.10-0.16 0.09-0.16
Mn (%) 0.35-0.60 0.3-0.6
Cr (%) 0.70-1.00 0.6-0.9
Ni (%) 3.00-3.75 2.75-3.15
P (%) <=0.035 Not specified
S (%) <=0.040 Not specified
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 GOST 4543 12HN3A
Tensile Strength Not specified 850-1050 MPa
Yield Strength Not specified 685 MPa min
Elongation Not specified 11% min
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).
GOST 4543 12HN3A
Used for gears, pinions, crankshafts, aircraft parts, and transmission components.
Key Differences
Can BS 970 (Part 1) 655M13 Be Substituted With GOST 4543 12HN3A?
BS 970 (Part 1) 655M13 and GOST 4543 12HN3A 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.
GOST 4543 12HN3A
Round Bar → (2 listings)
Diameter: 50–50 mm (1.97–1.97 in)
Length: 5600–6600 mm (220.47–259.84 in)
On M-EX Right Now
BS 970 (Part 1) 655M13
0 active listings and RFQs →
GOST 4543 12HN3A
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between BS 970 (Part 1) 655M13 and GOST 4543 12HN3A?
BS 970 (Part 1) 655M13 specifies P, S which are not specified for GOST 4543 12HN3A. GOST 4543 12HN3A specifies Si which is not specified for BS 970 (Part 1) 655M13.
Can BS 970 (Part 1) 655M13 be substituted with GOST 4543 12HN3A?
BS 970 (Part 1) 655M13 and GOST 4543 12HN3A 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.