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GB/T 699 40Mn vs GOST 1050 45

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

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

As per chemical composition, GB/T 699 40Mn vs GOST 1050 45 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 GB/T 699 40Mn:
BS 970 (Part 1) 040A04 BS 970 (Part 1) 045M10 BS 970 (Part 1) 060A45 BS 970 (Part 1) 040A10 BS 970 (Part 1) 040A12 BS 970 (Part 1) 045A10 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 GB/T 699 40Mn GOST 1050 45
Standard GB/T 699:2015 GOST 1050-2013
Category Carbon Steel Carbon Steel
C (%) 0.37-0.44 0.42-0.50
Si (%) 0.17-0.37 0.17-0.37
Mn (%) 0.70-1.00 0.50-0.80
P (%) <=0.035 <=0.035
S (%) <=0.035 <=0.040
Cr (%) <=0.25 <=0.25
Ni (%) <=0.30 <=0.25
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 GB/T 699 40Mn GOST 1050 45
Tensile Strength >=590 MPa 600-750 MPa
Yield Strength >=355 MPa >=355 MPa
Elongation >=17% >=16%
Hardness <=229 HB (as delivered, not heat treated) 170-229 HB
Condition Normalized 25 mm sample blank, bars up to 80 mm; hardness for delivery state Not specified
Typical Applications
GB/T 699 40Mn
Hot-rolled or forged quality carbon structural steel bars up to 250 mm
GOST 1050 45
gears, shafts, spindles, bolts, axles, forged components
Can GB/T 699 40Mn Be Substituted With GOST 1050 45?
GB/T 699 40Mn and GOST 1050 45 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
GB/T 699 40Mn
No active listings currently.
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)
On M-EX Right Now
GB/T 699 40Mn
0 active listings and RFQs →
GOST 1050 45
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between GB/T 699 40Mn and GOST 1050 45?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can GB/T 699 40Mn be substituted with GOST 1050 45?
GB/T 699 40Mn and GOST 1050 45 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.