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GOST 1050 40 vs SAE J403 1039

Strong Match — 88.7% match based on chemical composition and mechanical property overlap.

GOST 1050 40 (GOST 1050-2013) and SAE J403 1039 (SAE J403:2001) 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 SAE J403 1039 is commonly used for chemistry-only grade; product scope as listed in the composition notes. SAE J403 1039 is defined under SAE International (United States).

As per chemical composition, GOST 1050 40 vs SAE J403 1039 is a 88.7% match. Mechanical property data is not available for both grades, so this factor could not be scored. Combined, this makes them a strong match overall at 88.7%.

Frequently Compared With GOST 1050 40:
BS 970 (Part 3) 070M55 BS 970 (Part 1) 040A10 BS 970 (Part 1) 060A40 BS 970 (Part 1) 040A12 BS 970 (Part 3) 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) 045A10 BS 970 (Part 1) 045A10 BS 970 (Part 1) 045M10
Match Breakdown
CHEMISTRY MATCH
88.7%
MECHANICAL MATCH
No shared data
OVERALL
88.7%
Specifications
Property GOST 1050 40 SAE J403 1039
Standard GOST 1050-2013 SAE J403:2001
Category Carbon Steel Carbon Steel
C (%) 0.37-0.44 0.37-0.44
Mn (%) 0.5-0.8 0.70-1.00
Si (%) 0.17-0.37 Not specified
S (%) 0.04 max <=0.050
P (%) 0.035 max <=0.030
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 SAE J403 1039
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.
SAE J403 1039
Chemistry-only grade; product scope as listed in the composition notes
Key Differences
Can GOST 1050 40 Be Substituted With SAE J403 1039?
GOST 1050 40 and SAE J403 1039 overlap closely enough on chemistry and mechanical properties that SAE J403 1039 is often considered as a substitute for GOST 1050 40 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.
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)
SAE J403 1039
No active listings currently.
On M-EX Right Now
GOST 1050 40
2 active listings and RFQs →
SAE J403 1039
0 active listings and RFQs →
Frequently Asked Questions
What is the difference between GOST 1050 40 and SAE J403 1039?
GOST 1050 40 specifies Si which is not specified for SAE J403 1039.
Can GOST 1050 40 be substituted with SAE J403 1039?
GOST 1050 40 and SAE J403 1039 overlap closely enough on chemistry and mechanical properties that SAE J403 1039 is often considered as a substitute for GOST 1050 40 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.