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IS 5517 40C15S12 vs IS 1570 (Part 3) 10C8S10

Minimal Match — 54.7% match based on chemical composition and mechanical property overlap.

IS 5517 40C15S12 (IS 5517:1993) and IS 1570 (Part 3) 10C8S10 (IS 1570 (Part 3):1979) are both steel grades. Both fall under the Free Machining Steel category. IS 5517 40C15S12 is defined under Bureau of Indian Standards (IS), originating from India, while IS 1570 (Part 3) 10C8S10 is defined under Bureau of Indian Standards (IS), originating from India.

As per chemical composition, IS 5517 40C15S12 vs IS 1570 (Part 3) 10C8S10 is a 82.1% match. As per mechanical properties, the match is 0%. Combined, this makes them a minimal match overall at 54.7%.

Frequently Compared With IS 5517 40C15S12:
IS 4432 10C8S10 SAE J403 1117 SAE J403 1137 SAE J403 1126 SAE J403 1117 SAE J403 1118 SAE J403 1137 SAE J403 1141 SAE J403 1141 SAE J403 1141 SAE J403 1137 SAE J403 1118
Match Breakdown
CHEMISTRY MATCH
82.1%
MECHANICAL MATCH
0%
OVERALL
54.7%
Specifications
Property IS 5517 40C15S12 IS 1570 (Part 3) 10C8S10
Standard IS 5517:1993 IS 1570 (Part 3):1979
Category Free Machining Steel Free Machining Steel
C (%) 0.35-0.45 <=0.15
Si (%) <=0.25 0.05-0.30
Mn (%) 1.30-1.70 0.60-0.90
S (%) 0.08-0.15 0.08-0.13
P (%) <=0.035 <=0.060
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property IS 5517 40C15S12 IS 1570 (Part 3) 10C8S10
Tensile Strength 700-850 MPa 370-490 MPa
Yield Strength (0.2% proof) 500 MPa min Not specified
Elongation >=18% >=24%
Izod Impact 35 J min Not specified
Hardness (annealed) <=200 HB Not specified
Condition Hardened and tempered, ruling section up to 60 mm Hot rolled or normalized bars, billets and forgings (Table 2), ruling sections up to 150 mm
Can IS 5517 40C15S12 Be Substituted With IS 1570 (Part 3) 10C8S10?
IS 5517 40C15S12 and IS 1570 (Part 3) 10C8S10 share some compositional similarity but differ enough that substitution should not be assumed. Review the differences above carefully, and consult the applicable standard or a metallurgist before using one in place of the other.
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IS 5517 40C15S12
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IS 1570 (Part 3) 10C8S10
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Frequently Asked Questions
What is the difference between IS 5517 40C15S12 and IS 1570 (Part 3) 10C8S10?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can IS 5517 40C15S12 be substituted with IS 1570 (Part 3) 10C8S10?
IS 5517 40C15S12 and IS 1570 (Part 3) 10C8S10 share some compositional similarity but differ enough that substitution should not be assumed. Review the differences above carefully, and consult the applicable standard or a metallurgist before using one in place of the other.