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GOST 1050 45 vs GB/T 699 40Mn

Related Material — 65.9% match based on chemical composition and mechanical property overlap.

GOST 1050 45 (GOST 1050-2013) and GB/T 699 40Mn (GB/T 699:2015) are both steel grades. Both fall under the Carbon Steel category. GOST 1050 45 is typically used for gears, shafts, spindles, bolts, axles, forged components, while GB/T 699 40Mn is commonly used for hot-rolled or forged quality carbon structural steel bars up to 250 mm. GB/T 699 40Mn is defined under Guobiao Standards (GB/T) (China).

As per chemical composition, GOST 1050 45 vs GB/T 699 40Mn is a 86.4% match. As per mechanical properties, the match is 25%. Combined, this makes them a related material overall at 65.9%.

Frequently Compared With GOST 1050 45:
BS 970 (Part 1) 040A10 BS 970 (Part 3) 070M55 BS 970 (Part 1) 045A10 BS 970 (Part 1) 040A04 BS 970 (Part 1) 040A12 BS 970 (Part 1) 045M10 BS 970 (Part 1) 045A10 BS 970 (Part 3) 045A10 BS 970 (Part 1) 045M10 BS 970 (Part 3) 045M10 BS 970 (Part 1) 055M15 BS 970 (Part 1) 060A32
Match Breakdown
CHEMISTRY MATCH
86.4%
MECHANICAL MATCH
25%
OVERALL
65.9%
Specifications
Property GOST 1050 45 GB/T 699 40Mn
Standard GOST 1050-2013 GB/T 699:2015
Category Carbon Steel Carbon Steel
C (%) 0.42-0.50 0.37-0.44
Si (%) 0.17-0.37 0.17-0.37
Mn (%) 0.50-0.80 0.70-1.00
S (%) <=0.040 <=0.035
P (%) <=0.035 <=0.035
Cr (%) <=0.25 <=0.25
Ni (%) <=0.25 <=0.30
Cu (%) <=0.25 <=0.25
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 45 GB/T 699 40Mn
Tensile Strength 600-750 MPa >=590 MPa
Yield Strength >=355 MPa >=355 MPa
Elongation >=16% >=17%
Hardness 170-229 HB <=229 HB (as delivered, not heat treated)
Condition Not specified Normalized 25 mm sample blank, bars up to 80 mm; hardness for delivery state
Typical Applications
GOST 1050 45
gears, shafts, spindles, bolts, axles, forged components
GB/T 699 40Mn
Hot-rolled or forged quality carbon structural steel bars up to 250 mm
Can GOST 1050 45 Be Substituted With GB/T 699 40Mn?
GOST 1050 45 and GB/T 699 40Mn 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 45
Round Bar → (2 listings)
Diameter: 40–40 mm (1.57–1.57 in)
Length: 6600–7000 mm (259.84–275.59 in)
GB/T 699 40Mn
No active listings currently.
On M-EX Right Now
GOST 1050 45
2 active listings and RFQs →
GB/T 699 40Mn
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Frequently Asked Questions
What is the difference between GOST 1050 45 and GB/T 699 40Mn?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can GOST 1050 45 be substituted with GB/T 699 40Mn?
GOST 1050 45 and GB/T 699 40Mn 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.