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GOST 4543 40XH vs BS 970 EN111A

Close Alternative — 82.4% match based on chemical composition and mechanical property overlap.

GOST 4543 40XH (GOST 4543-2016) and BS 970 EN111A (BS 970:1955) are both steel grades. Both fall under the Alloy Steel category. BS 970 EN111A is defined under British Standards (BS) (United Kingdom).

As per chemical composition, GOST 4543 40XH vs BS 970 EN111A is a 82.4% 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 82.4%.

Frequently Compared With GOST 4543 40XH:
GOST 4543 12HN3A UNI 11234 100Cr6 NF A35-565 100C6 GB/T 3077 12Cr2Ni4A IS 4367 07Cr4Mo6 IS 1570 (Part 4) 07Cr4Mo6 IS 1570 (Part 4) 103Cr4 IS 1570 (Part 4) 103Cr6 IS 1570 (Part 4) 105Cr5 IS 1570 (Part 4) 10Cr20Mo6 IS 1570 (Part 7) 10Cr36Mo10H IS 4367 10Cr9Mo10
Match Breakdown
CHEMISTRY MATCH
82.4%
MECHANICAL MATCH
No shared data
OVERALL
82.4%
Specifications
Property GOST 4543 40XH BS 970 EN111A
Standard GOST 4543-2016 BS 970:1955
Category Alloy Steel Alloy Steel
C (%) 0.36-0.44 0.33-0.38
Si (%) 0.17-0.37 0.10-0.35
Mn (%) 0.50-0.80 0.60-0.90
S (%) <=0.035 <=0.050
P (%) <=0.035 <=0.050
Cr (%) 0.45-0.75 0.45-0.75
Ni (%) 1.00-1.40 1.00-1.50
Cu (%) <=0.30 Not specified
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 40XH BS 970 EN111A
Tensile Strength 980-1180 MPa Not specified
Yield Strength >=785 MPa Not specified
Elongation >=10% Not specified
Hardness 241-285 HB Not specified
Typical Applications
GOST 4543 40XH
heavy-duty gears, transmission shafts, axles, high-strength fasteners, forged machinery parts
BS 970 EN111A
Not documented
Key Differences
Can GOST 4543 40XH Be Substituted With BS 970 EN111A?
GOST 4543 40XH and BS 970 EN111A 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 40XH
Round Bar → (2 listings)
Diameter: 50–50 mm (1.97–1.97 in)
Length: 5900–6100 mm (232.28–240.16 in)
BS 970 EN111A
No active listings currently.
On M-EX Right Now
GOST 4543 40XH
2 active listings and RFQs →
BS 970 EN111A
0 active listings and RFQs →
Frequently Asked Questions
What is the difference between GOST 4543 40XH and BS 970 EN111A?
GOST 4543 40XH specifies Cu which is not specified for BS 970 EN111A.
Can GOST 4543 40XH be substituted with BS 970 EN111A?
GOST 4543 40XH and BS 970 EN111A 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.