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IS 5517 40C15S12 vs IS 4432 10C8S10

Related Material — 59.8% match based on chemical composition and mechanical property overlap.

IS 5517 40C15S12 (IS 5517:1993) and IS 4432 10C8S10 (IS 4432:1988) 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 4432 10C8S10 is defined under Bureau of Indian Standards (IS), originating from India.

As per chemical composition, IS 5517 40C15S12 vs IS 4432 10C8S10 is a 82.2% match. As per mechanical properties, the match is 15%. Combined, this makes them a related material overall at 59.8%.

Frequently Compared With IS 5517 40C15S12:
IS 1570 (Part 3) 10C8S10 SAE J403 1117 SAE J403 1137 SAE J403 1117 SAE J403 1126 SAE J403 1118 SAE J403 1137 SAE J403 1141 SAE J403 1141 SAE J403 1141 SAE J403 1118 SAE J403 1137
Match Breakdown
CHEMISTRY MATCH
82.2%
MECHANICAL MATCH
15%
OVERALL
59.8%
Specifications
Property IS 5517 40C15S12 IS 4432 10C8S10
Standard IS 5517:1993 IS 4432:1988
Category Free Machining Steel Free Machining Steel
C (%) 0.35-0.45 <=0.15
Si (%) <=0.25 0.15-0.35
Mn (%) 1.30-1.70 0.60-0.90
S (%) 0.08-0.15 0.08-0.13
P (%) <=0.035 <=0.035
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 4432 10C8S10
Tensile Strength 700-850 MPa Not specified
Yield Strength (0.2% proof) 500 MPa min Not specified
Elongation >=18% Not specified
Izod Impact 35 J min Not specified
Hardness (annealed) <=200 HB Not specified
Condition Hardened and tempered, ruling section up to 60 mm Not specified
Core Tensile Strength Not specified 600-850 MPa (16 mm) / 550-800 MPa (30 mm)
Core Yield Strength Not specified >=400 MPa (16 mm) / >=330 MPa (30 mm)
Core Elongation Not specified >=12% (16 mm) / >=14% (30 mm)
Core Reduction of Area Not specified >=35% (16 mm) / >=40% (30 mm)
Hardness, annealed (A) Not specified <=150 HB
Typical Applications
IS 5517 40C15S12
Not documented
IS 4432 10C8S10
Forgings and fabrication of case-hardened machine or automobile parts
Can IS 5517 40C15S12 Be Substituted With IS 4432 10C8S10?
IS 5517 40C15S12 and IS 4432 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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Frequently Asked Questions
What is the difference between IS 5517 40C15S12 and IS 4432 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 4432 10C8S10?
IS 5517 40C15S12 and IS 4432 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.