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GOST 4543 12HN3A vs BS 970 (Part 3) 655M13

Close Alternative — 83.8% match based on chemical composition and mechanical property overlap.

GOST 4543 12HN3A (GOST 4543-2016) and BS 970 (Part 3) 655M13 (BS 970 (Part 3):1991) are both steel grades. Both fall under the Alloy Steel category. GOST 4543 12HN3A is typically used for used for gears, pinions, crankshafts, aircraft parts, and transmission components., while BS 970 (Part 3) 655M13 is commonly used for bright cold finished bars (cold drawn, turned or precision ground) for general engineering purposes, in straight lengths; alloy case hardening steel (table 15). BS 970 (Part 3) 655M13 is defined under British Standards (BS) (United Kingdom).

As per chemical composition, GOST 4543 12HN3A vs BS 970 (Part 3) 655M13 is a 83.8% 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 83.8%.

Frequently Compared With GOST 4543 12HN3A:
GB/T 3077 12Cr2Ni4A IS 1570 (Part 4) 103Cr4 IS 1570 (Part 4) 10Mo6 IS 1570 (Part 4) 103Cr6 IS 1570 (Part 4) 07Cr4Mo6 IS 1570 (Part 4) 10Cr20Mo6 NF A35-565 100C6 IS 1570 (Part 4) 105Cr5 IS 4367 07Cr4Mo6 UNI 11234 100Cr6 IS 1570 (Part 7) 10Cr36Mo10H GB/T 3077 12CrNi3
Match Breakdown
CHEMISTRY MATCH
83.8%
MECHANICAL MATCH
No shared data
OVERALL
83.8%
Specifications
Property GOST 4543 12HN3A BS 970 (Part 3) 655M13
Standard GOST 4543-2016 BS 970 (Part 3):1991
Category Alloy Steel Alloy Steel
C (%) 0.09-0.16 0.10-0.16
Cr (%) 0.6-0.9 0.70-1.00
Ni (%) 2.75-3.15 3.00-3.75
Mn (%) 0.3-0.6 0.35-0.60
Si (%) 0.17-0.37 0.10-0.40
P (%) Not specified <=0.04
S (%) Not specified <=0.05
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property GOST 4543 12HN3A BS 970 (Part 3) 655M13
Tensile Strength 850-1050 MPa Not specified
Yield Strength 685 MPa min Not specified
Elongation 11% min Not specified
Hardness 58-62 HRC (case) Not specified
Typical Applications
GOST 4543 12HN3A
Used for gears, pinions, crankshafts, aircraft parts, and transmission components.
BS 970 (Part 3) 655M13
Bright cold finished bars (cold drawn, turned or precision ground) for general engineering purposes, in straight lengths; alloy case hardening steel (Table 15)
Key Differences
Can GOST 4543 12HN3A Be Substituted With BS 970 (Part 3) 655M13?
GOST 4543 12HN3A and BS 970 (Part 3) 655M13 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
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)
BS 970 (Part 3) 655M13
No active listings currently.
On M-EX Right Now
GOST 4543 12HN3A
2 active listings and RFQs →
BS 970 (Part 3) 655M13
0 active listings and RFQs →
Frequently Asked Questions
What is the difference between GOST 4543 12HN3A and BS 970 (Part 3) 655M13?
BS 970 (Part 3) 655M13 specifies P, S which are not specified for GOST 4543 12HN3A.
Can GOST 4543 12HN3A be substituted with BS 970 (Part 3) 655M13?
GOST 4543 12HN3A and BS 970 (Part 3) 655M13 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.