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SAE J403 1040 vs IS 1570 (Part 2/Sec 1) 40C8

Strong Match — 97.4% match based on chemical composition and mechanical property overlap.

SAE J403 1040 (SAE J403:2014) and IS 1570 (Part 2/Sec 1) 40C8 (IS 1570 (Part 2/Sec 1):1979) are both steel grades. Both fall under the Carbon Steel category. SAE J403 1040 is typically used for chemistry-only grade; product scope as listed in the composition notes, while IS 1570 (Part 2/Sec 1) 40C8 is commonly used for hardened and tempered parts, cold rolled medium and high carbon strip and hot rolled bars for bright bars and machined parts (the standard links this grade to is 5517, is 7226, is 7283). SAE J403 1040 is defined under SAE International, originating from United States, while IS 1570 (Part 2/Sec 1) 40C8 is defined under Bureau of Indian Standards (IS), originating from India.

As per chemical composition, SAE J403 1040 vs IS 1570 (Part 2/Sec 1) 40C8 is a 97.4% 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 97.4%.

Frequently Compared With SAE J403 1040:
BS 970 (Part 3) 070M55 BS 970 (Part 1) 040A10 BS 970 (Part 1) 055M15 BS 970 (Part 1) 060A32 BS 970 (Part 3) 045A10 BS 970 (Part 1) 045A10 BS 970 (Part 1) 045M10 BS 970 (Part 1) 045M10 BS 970 (Part 1) 040A04 BS 970 (Part 1) 040A12 BS 970 (Part 1) 045A10 BS 970 (Part 3) 045M10
Match Breakdown
CHEMISTRY MATCH
97.4%
MECHANICAL MATCH
No shared data
OVERALL
97.4%
Specifications
Property SAE J403 1040 IS 1570 (Part 2/Sec 1) 40C8
Standard SAE J403:2014 IS 1570 (Part 2/Sec 1):1979
Category Carbon Steel Carbon Steel
C (%) 0.37-0.44 0.35-0.45
Mn (%) 0.60-0.90 0.60-0.90
P (%) <=0.030 (flat rolled), <=0.040 (long products) Not specified
S (%) <=0.035 (flat rolled), <=0.050 (long products) Not specified
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property SAE J403 1040 IS 1570 (Part 2/Sec 1) 40C8
Tensile Strength Not specified 580-680 MPa
Elongation Not specified >=18%
Typical Applications
SAE J403 1040
Chemistry-only grade; product scope as listed in the composition notes
IS 1570 (Part 2/Sec 1) 40C8
Hardened and tempered parts, cold rolled medium and high carbon strip and hot rolled bars for bright bars and machined parts (the standard links this grade to IS 5517, IS 7226, IS 7283)
Key Differences
Can SAE J403 1040 Be Substituted With IS 1570 (Part 2/Sec 1) 40C8?
SAE J403 1040 and IS 1570 (Part 2/Sec 1) 40C8 overlap closely enough on chemistry and mechanical properties that IS 1570 (Part 2/Sec 1) 40C8 is often considered as a substitute for SAE J403 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
SAE J403 1040
Round Bar → (2 listings)
Diameter: 40–40 mm (1.57–1.57 in)
Length: 6000–6200 mm (236.22–244.09 in)
IS 1570 (Part 2/Sec 1) 40C8
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On M-EX Right Now
SAE J403 1040
2 active listings and RFQs →
IS 1570 (Part 2/Sec 1) 40C8
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Frequently Asked Questions
What is the difference between SAE J403 1040 and IS 1570 (Part 2/Sec 1) 40C8?
SAE J403 1040 specifies P, S which are not specified for IS 1570 (Part 2/Sec 1) 40C8.
Can SAE J403 1040 be substituted with IS 1570 (Part 2/Sec 1) 40C8?
SAE J403 1040 and IS 1570 (Part 2/Sec 1) 40C8 overlap closely enough on chemistry and mechanical properties that IS 1570 (Part 2/Sec 1) 40C8 is often considered as a substitute for SAE J403 1040 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.