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AISI 1040 vs SAE J403 1039

Strong Match — 97.1% match based on chemical composition and mechanical property overlap.

AISI 1040 and SAE J403 1039 (SAE J403:2014) are both steel grades. Both fall under the Carbon Steel category. AISI 1040 is typically used for shafts, gears, bolts, couplings, crankshafts, while SAE J403 1039 is commonly used for chemistry-only grade; product scope as listed in the composition notes. AISI 1040 is defined under AISI, originating from United States, while SAE J403 1039 is defined under SAE International, originating from United States.

As per chemical composition, AISI 1040 vs SAE J403 1039 is a 97.1% 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 97.1%.

Frequently Compared With AISI 1040:
BS 970 (Part 1) 040A10 BS 970 (Part 3) 070M55 BS 970 (Part 1) 040A04 BS 970 (Part 1) 055M15 BS 970 (Part 1) 040A12 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 BS 970 (Part 1) 060A40
Match Breakdown
CHEMISTRY MATCH
97.1%
MECHANICAL MATCH
No shared data
OVERALL
97.1%
Specifications
Property AISI 1040 SAE J403 1039
Standard AISI SAE J403:2014
Category Carbon Steel Carbon Steel
C (%) 0.37–0.44 0.37-0.44
Mn (%) 0.60–0.90 0.70-1.00
S (%) ≤0.050 <=0.035 (flat rolled), <=0.050 (long products)
P (%) ≤0.030 <=0.030 (flat rolled), <=0.040 (long products)
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property AISI 1040 SAE J403 1039
Condition Hot Rolled Not specified
Tensile Strength 565-690 MPa Not specified
Yield Strength 375-460 MPa Not specified
Elongation 20-30% Not specified
Hardness 179-217 HB Not specified
Typical Applications
AISI 1040
Shafts, gears, bolts, couplings, crankshafts
SAE J403 1039
Chemistry-only grade; product scope as listed in the composition notes
Can AISI 1040 Be Substituted With SAE J403 1039?
AISI 1040 and SAE J403 1039 overlap closely enough on chemistry and mechanical properties that SAE J403 1039 is often considered as a substitute for AISI 1040 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
AISI 1040
Round Bar → (3 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
AISI 1040
3 active listings and RFQs →
SAE J403 1039
0 active listings and RFQs →
Frequently Asked Questions
What is the difference between AISI 1040 and SAE J403 1039?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can AISI 1040 be substituted with SAE J403 1039?
AISI 1040 and SAE J403 1039 overlap closely enough on chemistry and mechanical properties that SAE J403 1039 is often considered as a substitute for AISI 1040 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.