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GOST 1050 40 vs BS 970 (Part 1) 040A12

Related Material — 69.9% match based on chemical composition and mechanical property overlap.

GOST 1050 40 (GOST 1050-2013) and BS 970 (Part 1) 040A12 (BS 970 (Part 1):1991) are both steel grades. Both fall under the Carbon Steel category. GOST 1050 40 is typically used for used for shafts, gears, axles, bolts, and machine structural parts., while BS 970 (Part 1) 040A12 is commonly used for as-rolled, or as-rolled and softened, steel (section two). BS 970 (Part 1) 040A12 is defined under British Standards (BS) (United Kingdom).

As per chemical composition, GOST 1050 40 vs BS 970 (Part 1) 040A12 is a 78.6% 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 69.9%.

Frequently Compared With GOST 1050 40:
BS 970 (Part 1) 080A20 BS 970 (Part 3) 070M55 BS 970 (Part 1) 040A10 BS 970 (Part 1) 055M15 BS 970 (Part 1) 060A40 BS 970 (Part 1) 045A10 BS 970 (Part 3) 045A10 BS 970 (Part 1) 045M10 BS 970 (Part 3) 045M10 BS 970 (Part 1) 040A04 BS 970 (Part 1) 045A10 BS 970 (Part 1) 045M10
Match Breakdown
CHEMISTRY MATCH
78.6%
MECHANICAL MATCH
No shared data
OVERALL
69.9%
Specifications
Property GOST 1050 40 BS 970 (Part 1) 040A12
Standard GOST 1050-2013 BS 970 (Part 1):1991
Category Carbon Steel Carbon Steel
C (%) 0.37-0.44 0.10-0.15
Mn (%) 0.5-0.8 0.30-0.50
Si (%) 0.17-0.37 Not specified
S (%) 0.04 max Not specified
P (%) 0.035 max 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 40 BS 970 (Part 1) 040A12
Tensile Strength 570-740 MPa Not specified
Yield Strength 340 MPa min Not specified
Elongation 19% min Not specified
Hardness 170-220 HB Not specified
Typical Applications
GOST 1050 40
Used for shafts, gears, axles, bolts, and machine structural parts.
BS 970 (Part 1) 040A12
As-rolled, or as-rolled and softened, steel (section two)
Key Differences
Can GOST 1050 40 Be Substituted With BS 970 (Part 1) 040A12?
GOST 1050 40 and BS 970 (Part 1) 040A12 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 40
Round Bar → (2 listings)
Diameter: 40–40 mm (1.57–1.57 in)
Length: 6200–7000 mm (244.09–275.59 in)
BS 970 (Part 1) 040A12
No active listings currently.
On M-EX Right Now
GOST 1050 40
2 active listings and RFQs →
BS 970 (Part 1) 040A12
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Frequently Asked Questions
What is the difference between GOST 1050 40 and BS 970 (Part 1) 040A12?
GOST 1050 40 specifies Si, S, P which are not specified for BS 970 (Part 1) 040A12.
Can GOST 1050 40 be substituted with BS 970 (Part 1) 040A12?
GOST 1050 40 and BS 970 (Part 1) 040A12 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.