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IS 1570 (Part 3) 40C15S12 vs SAE J403 1126

Close Alternative — 79.4% match based on chemical composition and mechanical property overlap.

IS 1570 (Part 3) 40C15S12 (IS 1570 (Part 3):1979) and SAE J403 1126 (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 1126 is defined under SAE International, originating from United States.

As per chemical composition, IS 1570 (Part 3) 40C15S12 vs SAE J403 1126 is a 79.4% match. Mechanical property data is not available for both grades, so this factor could not be scored. Combined, this makes them a close alternative overall at 79.4%.

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 1141 SAE J403 1117 SAE J403 1117 SAE J403 1141 SAE J403 1118 SAE J403 1118
Match Breakdown
CHEMISTRY MATCH
79.4%
MECHANICAL MATCH
No shared data
OVERALL
79.4%
Specifications
Property IS 1570 (Part 3) 40C15S12 SAE J403 1126
Standard IS 1570 (Part 3):1979 SAE J403:2014
Category Free Machining Steel Free Machining Steel
C (%) 0.35-0.45 0.23-0.29
Si (%) <=0.25 Not specified
Mn (%) 1.30-1.70 0.70-1.00
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 1126
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 1126
Chemistry-only grade; product scope as listed in the composition notes
Key Differences
Can IS 1570 (Part 3) 40C15S12 Be Substituted With SAE J403 1126?
IS 1570 (Part 3) 40C15S12 and SAE J403 1126 are a close alternative rather than a direct substitute. Some properties overlap well, but check the specific chemistry and mechanical rows above against your application's requirements before treating them as interchangeable.
On M-EX Right Now
IS 1570 (Part 3) 40C15S12
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SAE J403 1126
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Frequently Asked Questions
What is the difference between IS 1570 (Part 3) 40C15S12 and SAE J403 1126?
IS 1570 (Part 3) 40C15S12 specifies Si which is not specified for SAE J403 1126.
Can IS 1570 (Part 3) 40C15S12 be substituted with SAE J403 1126?
IS 1570 (Part 3) 40C15S12 and SAE J403 1126 are a close alternative rather than a direct substitute. Some properties overlap well, but check the specific chemistry and mechanical rows above against your application's requirements before treating them as interchangeable.