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GOST 1050 20 vs BS 970 (Part 3) 637M17

Related Material — 65% match based on chemical composition and mechanical property overlap.

GOST 1050 20 (GOST 1050-2013) and BS 970 (Part 3) 637M17 (BS 970 (Part 3):1991) are both steel grades. GOST 1050 20 is classified under Carbon Steel, while BS 970 (Part 3) 637M17 is classified under Alloy Steel — a different category, which is worth noting alongside the chemistry match below. GOST 1050 20 is typically used for shafts, bolts, gears, pins, forgings, machined components, while BS 970 (Part 3) 637M17 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) 637M17 is defined under British Standards (BS) (United Kingdom).

As per chemical composition, GOST 1050 20 vs BS 970 (Part 3) 637M17 is a 66.5% 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 65%.

Frequently Compared With GOST 1050 20:
BS 970 (Part 3) 070M55 BS 970 (Part 1) 040A10 BS 970 (Part 3) 045A10 BS 970 (Part 1) 045M10 BS 970 (Part 1) 045A10 BS 970 (Part 1) 040A12 BS 970 (Part 1) 045A10 BS 970 (Part 1) 045M10 BS 970 (Part 3) 045M10 BS 970 (Part 1) 055M15 BS 970 (Part 1) 040A04 BS 970 (Part 1) 060A32
Match Breakdown
CHEMISTRY MATCH
66.5%
MECHANICAL MATCH
No shared data
OVERALL
65%
Specifications
Property GOST 1050 20 BS 970 (Part 3) 637M17
Standard GOST 1050-2013 BS 970 (Part 3):1991
Category Carbon Steel Alloy Steel
C (%) 0.17-0.24 0.14-0.20
Si (%) 0.17-0.37 0.10-0.40
Mn (%) 0.35-0.65 0.60-0.90
S (%) <=0.040 <=0.05
P (%) <=0.035 <=0.04
Cr (%) <=0.25 0.60-1.00
Ni (%) <=0.25 0.85-1.25
Cu (%) <=0.25 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 1050 20 BS 970 (Part 3) 637M17
Tensile Strength 410-550 MPa Not specified
Yield Strength >=245 MPa Not specified
Elongation >=24% Not specified
Hardness <=156 HB Not specified
Typical Applications
GOST 1050 20
shafts, bolts, gears, pins, forgings, machined components
BS 970 (Part 3) 637M17
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 1050 20 Be Substituted With BS 970 (Part 3) 637M17?
GOST 1050 20 and BS 970 (Part 3) 637M17 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 1050 20
Round Bar → (2 listings)
Diameter: 40–40 mm (1.57–1.57 in)
Length: 5900–5900 mm (232.28–232.28 in)
BS 970 (Part 3) 637M17
No active listings currently.
On M-EX Right Now
GOST 1050 20
2 active listings and RFQs →
BS 970 (Part 3) 637M17
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Frequently Asked Questions
What is the difference between GOST 1050 20 and BS 970 (Part 3) 637M17?
Different category: GOST 1050 20 is Carbon Steel, BS 970 (Part 3) 637M17 is Alloy Steel. GOST 1050 20 specifies Cu which is not specified for BS 970 (Part 3) 637M17.
Can GOST 1050 20 be substituted with BS 970 (Part 3) 637M17?
GOST 1050 20 and BS 970 (Part 3) 637M17 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.