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IS 1570 (Part 3) 40C15S12 vs SAE J403 1141

Strong Match — 88.9% match based on chemical composition and mechanical property overlap.

IS 1570 (Part 3) 40C15S12 (IS 1570 (Part 3):1979) and SAE J403 1141 (SAE J403:2014) are both steel grades. Both fall under the Free Machining Steel category. IS 1570 (Part 3) 40C15S12 is defined under Bureau of Indian Standards (IS), originating from India, while SAE J403 1141 is defined under SAE International, originating from United States.

As per chemical composition, IS 1570 (Part 3) 40C15S12 vs SAE J403 1141 is a 88.9% 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 88.9%.

Frequently Compared With IS 1570 (Part 3) 40C15S12:
IS 1570 (Part 3) 10C8S10 IS 4432 10C8S10 SAE J403 1117 SAE J403 1126 SAE J403 1126 SAE J403 1141 SAE J403 1117 SAE J403 1117 SAE J403 1126 SAE J403 1141 SAE J403 1118 SAE J403 1118
Match Breakdown
CHEMISTRY MATCH
88.9%
MECHANICAL MATCH
No shared data
OVERALL
88.9%
Specifications
Property IS 1570 (Part 3) 40C15S12 SAE J403 1141
Standard IS 1570 (Part 3):1979 SAE J403:2014
Category Free Machining Steel Free Machining Steel
C (%) 0.35-0.45 0.37-0.45
Si (%) <=0.25 Not specified
Mn (%) 1.30-1.70 1.35-1.65
P (%) <=0.060 <=0.030
S (%) 0.08-0.15 0.08-0.13
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property IS 1570 (Part 3) 40C15S12 SAE J403 1141
Tensile Strength 600-700 MPa Not specified
Elongation >=15% Not specified
Condition Hot rolled or normalized bars, billets and forgings (Table 2), ruling sections up to 150 mm Not specified
Typical Applications
IS 1570 (Part 3) 40C15S12
Not documented
SAE J403 1141
Chemistry-only grade; product scope as listed in the composition notes
Key Differences
Can IS 1570 (Part 3) 40C15S12 Be Substituted With SAE J403 1141?
IS 1570 (Part 3) 40C15S12 and SAE J403 1141 overlap closely enough on chemistry and mechanical properties that SAE J403 1141 is often considered as a substitute for IS 1570 (Part 3) 40C15S12 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
IS 1570 (Part 3) 40C15S12
No active listings currently.
SAE J403 1141
Hex Bar → (3 listings)
Across Flats: 25–25 mm (0.98–0.98 in)
Length: 2900–3200 mm (114.17–125.98 in)
On M-EX Right Now
IS 1570 (Part 3) 40C15S12
0 active listings and RFQs →
SAE J403 1141
3 active listings and RFQs →
Frequently Asked Questions
What is the difference between IS 1570 (Part 3) 40C15S12 and SAE J403 1141?
IS 1570 (Part 3) 40C15S12 specifies Si which is not specified for SAE J403 1141.
Can IS 1570 (Part 3) 40C15S12 be substituted with SAE J403 1141?
IS 1570 (Part 3) 40C15S12 and SAE J403 1141 overlap closely enough on chemistry and mechanical properties that SAE J403 1141 is often considered as a substitute for IS 1570 (Part 3) 40C15S12 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.