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GOST 4543 40HFA vs BS 970 (Part 3) 530M40

Close Alternative — 82.7% match based on chemical composition and mechanical property overlap.

GOST 4543 40HFA (GOST 4543-2016) and BS 970 (Part 3) 530M40 (BS 970 (Part 3):1991) are both steel grades. Both fall under the Alloy Steel category. GOST 4543 40HFA is typically used for used for springs, shafts, gears, fasteners, and aircraft structural components., while BS 970 (Part 3) 530M40 is commonly used for bright cold finished bars (cold drawn, turned or precision ground) for general engineering purposes, in straight lengths; alloy direct hardening steel (table 16). BS 970 (Part 3) 530M40 is defined under British Standards (BS) (United Kingdom).

As per chemical composition, GOST 4543 40HFA vs BS 970 (Part 3) 530M40 is a 82.7% 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 82.7%.

Frequently Compared With GOST 4543 40HFA:
NF A35-565 100C6 UNI 11234 100Cr6 GOST 4543 12HN3A GB/T 3077 12Cr2Ni4A IS 1570 (Part 4) 103Cr4 IS 4367 07Cr4Mo6 IS 1570 (Part 4) 103Cr6 IS 1570 (Part 4) 105Cr5 IS 1570 (Part 4) 07Cr4Mo6 IS 1570 (Part 4) 10Cr20Mo6 IS 1570 (Part 7) 10Cr36Mo10H IS 4367 10Cr9Mo10
Match Breakdown
CHEMISTRY MATCH
82.7%
MECHANICAL MATCH
No shared data
OVERALL
82.7%
Specifications
Property GOST 4543 40HFA BS 970 (Part 3) 530M40
Standard GOST 4543-2016 BS 970 (Part 3):1991
Category Alloy Steel Alloy Steel
C (%) 0.37-0.44 0.36-0.44
Cr (%) 0.8-1.1 0.90-1.20
V (%) 0.1-0.2 Not specified
Mn (%) 0.5-0.8 0.60-0.90
Si (%) 0.17-0.37 0.10-0.40
P (%) Not specified <=0.035
S (%) Not specified <=0.040
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 40HFA BS 970 (Part 3) 530M40
Tensile Strength 950-1150 MPa Not specified
Yield Strength 785 MPa min Not specified
Elongation 11% min Not specified
Hardness 269-331 HB Not specified
Typical Applications
GOST 4543 40HFA
Used for springs, shafts, gears, fasteners, and aircraft structural components.
BS 970 (Part 3) 530M40
Bright cold finished bars (cold drawn, turned or precision ground) for general engineering purposes, in straight lengths; alloy direct hardening steel (Table 16)
Key Differences
Can GOST 4543 40HFA Be Substituted With BS 970 (Part 3) 530M40?
GOST 4543 40HFA and BS 970 (Part 3) 530M40 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 40HFA
Round Bar → (2 listings)
Diameter: 50–50 mm (1.97–1.97 in)
Length: 6500–6600 mm (255.91–259.84 in)
BS 970 (Part 3) 530M40
No active listings currently.
On M-EX Right Now
GOST 4543 40HFA
2 active listings and RFQs →
BS 970 (Part 3) 530M40
0 active listings and RFQs →
Frequently Asked Questions
What is the difference between GOST 4543 40HFA and BS 970 (Part 3) 530M40?
GOST 4543 40HFA specifies V which is not specified for BS 970 (Part 3) 530M40. BS 970 (Part 3) 530M40 specifies P, S which are not specified for GOST 4543 40HFA.
Can GOST 4543 40HFA be substituted with BS 970 (Part 3) 530M40?
GOST 4543 40HFA and BS 970 (Part 3) 530M40 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.