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GOST 4543 30HN3A vs BS 970 (Part 3) 655M13

Related Material — 69.9% match based on chemical composition and mechanical property overlap.

GOST 4543 30HN3A (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 30HN3A is typically used for used for aircraft fittings, shafts, gears, spindles, and heavy machinery parts., 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 30HN3A vs BS 970 (Part 3) 655M13 is a 76.4% match. Mechanical property data is not available for both grades, so this factor could not be scored. Combined, this makes them a related material overall at 69.9%.

Frequently Compared With GOST 4543 30HN3A:
GOST 4543 12HN3A NF A35-565 100C6 UNI 11234 100Cr6 GB/T 3077 12Cr2Ni4A IS 1570 (Part 4) 10Cr20Mo6 IS 4367 10Cr9Mo10 IS 1570 (Part 4) 07Cr4Mo6 IS 4367 07Cr4Mo6 IS 1570 (Part 4) 103Cr4 IS 1570 (Part 4) 103Cr6 IS 1570 (Part 4) 105Cr5 IS 1570 (Part 7) 10Cr36Mo10H
Match Breakdown
CHEMISTRY MATCH
76.4%
MECHANICAL MATCH
No shared data
OVERALL
69.9%
Specifications
Property GOST 4543 30HN3A BS 970 (Part 3) 655M13
Standard GOST 4543-2016 BS 970 (Part 3):1991
Category Alloy Steel Alloy Steel
C (%) 0.27-0.34 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 30HN3A BS 970 (Part 3) 655M13
Tensile Strength 980-1180 MPa Not specified
Yield Strength 835 MPa min Not specified
Elongation 10% min Not specified
Hardness 285-352 HB Not specified
Typical Applications
GOST 4543 30HN3A
Used for aircraft fittings, shafts, gears, spindles, and heavy machinery parts.
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 30HN3A Be Substituted With BS 970 (Part 3) 655M13?
GOST 4543 30HN3A and BS 970 (Part 3) 655M13 share some compositional similarity but differ enough that substitution should not be assumed. Review the differences above carefully, and consult the applicable standard or a metallurgist before using one in place of the other.
Forms & Sizes Available on M-EX
GOST 4543 30HN3A
Round Bar → (2 listings)
Diameter: 50–50 mm (1.97–1.97 in)
Length: 6000–6300 mm (236.22–248.03 in)
BS 970 (Part 3) 655M13
No active listings currently.
On M-EX Right Now
GOST 4543 30HN3A
2 active listings and RFQs →
BS 970 (Part 3) 655M13
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Frequently Asked Questions
What is the difference between GOST 4543 30HN3A and BS 970 (Part 3) 655M13?
BS 970 (Part 3) 655M13 specifies P, S which are not specified for GOST 4543 30HN3A.
Can GOST 4543 30HN3A be substituted with BS 970 (Part 3) 655M13?
GOST 4543 30HN3A and BS 970 (Part 3) 655M13 share some compositional similarity but differ enough that substitution should not be assumed. Review the differences above carefully, and consult the applicable standard or a metallurgist before using one in place of the other.