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GOST 1050 40 vs BS 970 (Part 3) 070M55

Close Alternative — 84.9% match based on chemical composition and mechanical property overlap.

GOST 1050 40 (GOST 1050-2013) and BS 970 (Part 3) 070M55 (BS 970 (Part 3):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 3) 070M55 is commonly used for used for springs, blades, wear plates, hand tools, shafts, and cutting components.. BS 970 (Part 3) 070M55 is defined under British Standards (BS) (United Kingdom).

As per chemical composition, GOST 1050 40 vs BS 970 (Part 3) 070M55 is a 86.7% 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 84.9%.

Frequently Compared With GOST 1050 40:
BS 970 (Part 1) 080A20 BS 970 (Part 1) 040A10 BS 970 (Part 1) 055M15 BS 970 (Part 1) 060A40 BS 970 (Part 1) 040A12 BS 970 (Part 1) 040A04 BS 970 (Part 1) 045A10 BS 970 (Part 3) 045A10 BS 970 (Part 1) 045M10 BS 970 (Part 3) 045M10 BS 970 (Part 1) 045A10 BS 970 (Part 1) 045M10
Match Breakdown
CHEMISTRY MATCH
86.7%
MECHANICAL MATCH
No shared data
OVERALL
84.9%
Specifications
Property GOST 1050 40 BS 970 (Part 3) 070M55
Standard GOST 1050-2013 BS 970 (Part 3):1991
Category Carbon Steel Carbon Steel
C (%) 0.37-0.44 0.50-0.60
Mn (%) 0.5-0.8 0.50-0.90
Si (%) 0.17-0.37 0.10-0.40
S (%) 0.04 max <=0.05
P (%) 0.035 max <=0.05
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 3) 070M55
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 3) 070M55
Used for springs, blades, wear plates, hand tools, shafts, and cutting components.
Can GOST 1050 40 Be Substituted With BS 970 (Part 3) 070M55?
GOST 1050 40 and BS 970 (Part 3) 070M55 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 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 3) 070M55
Round Bar → (2 listings)
Diameter: 40–40 mm (1.57–1.57 in)
Length: 4800–5800 mm (188.98–228.35 in)
On M-EX Right Now
GOST 1050 40
2 active listings and RFQs →
BS 970 (Part 3) 070M55
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between GOST 1050 40 and BS 970 (Part 3) 070M55?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can GOST 1050 40 be substituted with BS 970 (Part 3) 070M55?
GOST 1050 40 and BS 970 (Part 3) 070M55 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.