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GOST 4543 20HNM vs BS 970 (Part 1) 805H22

Strong Match — 89% match based on chemical composition and mechanical property overlap.

GOST 4543 20HNM (GOST 4543-2016) and BS 970 (Part 1) 805H22 (BS 970 (Part 1):1991) are both steel grades. Both fall under the Alloy Steel category. GOST 4543 20HNM is typically used for used for gears, splined shafts, bushings, axles, and machine drive components., while BS 970 (Part 1) 805H22 is commonly used for case hardening steel (section four). BS 970 (Part 1) 805H22 is defined under British Standards (BS) (United Kingdom).

As per chemical composition, GOST 4543 20HNM vs BS 970 (Part 1) 805H22 is a 89% 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 89%.

Frequently Compared With GOST 4543 20HNM:
GOST 4543 12HN3A NF A35-565 100C6 UNI 11234 100Cr6 GB/T 3077 12Cr2Ni4A IS 4367 07Cr4Mo6 IS 1570 (Part 4) 07Cr4Mo6 IS 1570 (Part 4) 103Cr4 IS 1570 (Part 7) 10Cr36Mo10H IS 1570 (Part 4) 103Cr6 IS 1570 (Part 4) 10Cr20Mo6 IS 1570 (Part 4) 105Cr5 IS 4367 10Cr9Mo10
Match Breakdown
CHEMISTRY MATCH
89%
MECHANICAL MATCH
No shared data
OVERALL
89%
Specifications
Property GOST 4543 20HNM BS 970 (Part 1) 805H22
Standard GOST 4543-2016 BS 970 (Part 1):1991
Category Alloy Steel Alloy Steel
C (%) 0.17-0.24 0.19-0.25
Cr (%) 0.4-0.7 0.35-0.65
Ni (%) 0.4-0.7 0.35-0.75
Mo (%) 0.15-0.25 0.15-0.25
Mn (%) 0.5-0.8 0.60-0.95
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 20HNM BS 970 (Part 1) 805H22
Tensile Strength 850-1000 MPa Not specified
Yield Strength 685 MPa min Not specified
Elongation 12% min Not specified
Hardness 56-60 HRC (case) Not specified
Typical Applications
GOST 4543 20HNM
Used for gears, splined shafts, bushings, axles, and machine drive components.
BS 970 (Part 1) 805H22
Case hardening steel (section four)
Can GOST 4543 20HNM Be Substituted With BS 970 (Part 1) 805H22?
GOST 4543 20HNM and BS 970 (Part 1) 805H22 overlap closely enough on chemistry and mechanical properties that BS 970 (Part 1) 805H22 is often considered as a substitute for GOST 4543 20HNM 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 20HNM
Round Bar → (2 listings)
Diameter: 50–50 mm (1.97–1.97 in)
Length: 5100–7000 mm (200.79–275.59 in)
BS 970 (Part 1) 805H22
No active listings currently.
On M-EX Right Now
GOST 4543 20HNM
2 active listings and RFQs →
BS 970 (Part 1) 805H22
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Frequently Asked Questions
What is the difference between GOST 4543 20HNM and BS 970 (Part 1) 805H22?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can GOST 4543 20HNM be substituted with BS 970 (Part 1) 805H22?
GOST 4543 20HNM and BS 970 (Part 1) 805H22 overlap closely enough on chemistry and mechanical properties that BS 970 (Part 1) 805H22 is often considered as a substitute for GOST 4543 20HNM in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.