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GOST 4543 20HM vs BS 970 (Part 1) 708A25

Strong Match — 85.1% match based on chemical composition and mechanical property overlap.

GOST 4543 20HM (GOST 4543-2016) and BS 970 (Part 1) 708A25 (BS 970 (Part 1):1983) are both steel grades. Both fall under the Alloy Steel category. GOST 4543 20HM is typically used for used for gears, camshafts, sleeves, axles, and machine transmission parts., while BS 970 (Part 1) 708A25 is commonly used for through hardening steel for mechanical and allied engineering purposes; supplied in the hardened and tempered conditions of table 6.. BS 970 (Part 1) 708A25 is defined under British Standards (BS) (United Kingdom).

As per chemical composition, GOST 4543 20HM vs BS 970 (Part 1) 708A25 is a 85.1% match. Mechanical property data is not available for both grades, so this factor could not be scored. Combined, this makes them a strong match overall at 85.1%.

Frequently Compared With GOST 4543 20HM:
NF A35-565 100C6 GB/T 3077 12Cr2Ni4A UNI 11234 100Cr6 GOST 4543 12HN3A IS 4367 07Cr4Mo6 IS 1570 (Part 4) 103Cr6 IS 1570 (Part 4) 10Cr20Mo6 IS 1570 (Part 4) 103Cr4 IS 4367 10Cr9Mo10 IS 1570 (Part 4) 07Cr4Mo6 IS 1570 (Part 4) 105Cr5 IS 1570 (Part 7) 10Cr36Mo10H
Match Breakdown
CHEMISTRY MATCH
85.1%
MECHANICAL MATCH
No shared data
OVERALL
85.1%
Specifications
Property GOST 4543 20HM BS 970 (Part 1) 708A25
Standard GOST 4543-2016 BS 970 (Part 1):1983
Category Alloy Steel Alloy Steel
C (%) 0.17-0.24 0.23-0.28
Cr (%) 0.9-1.2 0.90-1.20
Mo (%) 0.15-0.25 0.15-0.25
Mn (%) 0.5-0.8 0.50-0.80
Si (%) 0.17-0.37 Not specified
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 20HM BS 970 (Part 1) 708A25
Tensile Strength 780-980 MPa Not specified
Yield Strength 590 MPa min Not specified
Elongation 12% min Not specified
Hardness 56-60 HRC (case) Not specified
Typical Applications
GOST 4543 20HM
Used for gears, camshafts, sleeves, axles, and machine transmission parts.
BS 970 (Part 1) 708A25
Through hardening steel for mechanical and allied engineering purposes; supplied in the hardened and tempered conditions of Table 6.
Key Differences
Can GOST 4543 20HM Be Substituted With BS 970 (Part 1) 708A25?
GOST 4543 20HM and BS 970 (Part 1) 708A25 overlap closely enough on chemistry and mechanical properties that BS 970 (Part 1) 708A25 is often considered as a substitute for GOST 4543 20HM in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.
Forms & Sizes Available on M-EX
GOST 4543 20HM
Round Bar → (2 listings)
Diameter: 50–50 mm (1.97–1.97 in)
Length: 6000–6900 mm (236.22–271.65 in)
BS 970 (Part 1) 708A25
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On M-EX Right Now
GOST 4543 20HM
2 active listings and RFQs →
BS 970 (Part 1) 708A25
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Frequently Asked Questions
What is the difference between GOST 4543 20HM and BS 970 (Part 1) 708A25?
GOST 4543 20HM specifies Si which is not specified for BS 970 (Part 1) 708A25. BS 970 (Part 1) 708A25 specifies P, S which are not specified for GOST 4543 20HM.
Can GOST 4543 20HM be substituted with BS 970 (Part 1) 708A25?
GOST 4543 20HM and BS 970 (Part 1) 708A25 overlap closely enough on chemistry and mechanical properties that BS 970 (Part 1) 708A25 is often considered as a substitute for GOST 4543 20HM in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.