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IS 1570 (Part 4) 20C15 vs IS 1570 (Part 4) 27C15

Strong Match — 95% match based on chemical composition and mechanical property overlap.

IS 1570 (Part 4) 20C15 (IS 1570 (Part 4):1988) and IS 1570 (Part 4) 27C15 (IS 1570 (Part 4):1988) are both steel grades. Both fall under the Carbon Steel category. IS 1570 (Part 4) 20C15 is defined under Bureau of Indian Standards (IS), originating from India, while IS 1570 (Part 4) 27C15 is defined under Bureau of Indian Standards (IS), originating from India.

As per chemical composition, IS 1570 (Part 4) 20C15 vs IS 1570 (Part 4) 27C15 is a 92.5% match. As per mechanical properties, the match is 100%. Combined, this makes them a strong match overall at 95%.

Frequently Compared With IS 1570 (Part 4) 20C15:
BS 970 (Part 3) 070M55 BS 970 (Part 1) 040A10 BS 970 (Part 1) 045A10 BS 970 (Part 3) 070M20 BS 970 (Part 1) 040A04 BS 970 (Part 1) 045A10 BS 970 (Part 1) 045M10 BS 970 (Part 1) 040A12 BS 970 (Part 1) 045M10 BS 970 (Part 3) 045M10 BS 970 (Part 1) 055M15 BS 970 (Part 3) 045A10
Match Breakdown
CHEMISTRY MATCH
92.5%
MECHANICAL MATCH
100%
OVERALL
95%
Specifications
Property IS 1570 (Part 4) 20C15 IS 1570 (Part 4) 27C15
Standard IS 1570 (Part 4):1988 IS 1570 (Part 4):1988
Category Carbon Steel Carbon Steel
C (%) 0.16-0.24 0.22-0.32
Si (%) 0.10-0.35 0.10-0.35
Mn (%) 1.30-1.70 1.30-1.70
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 4) 20C15 IS 1570 (Part 4) 27C15
Tensile Strength 690-840 MPa 690-840 MPa
Yield Strength >=450 MPa (0.2 % proof stress) >=450 MPa (0.2 % proof stress)
Elongation >=16% >=16%
Izod Impact >=48 J >=48 J
Hardness 201-248 HBS (guidance only) 201-248 HBS (guidance only)
Condition Bars and forgings, hardened and tempered (oil hardened unless stated), limiting ruling section 30 mm Bars and forgings, hardened and tempered (oil hardened unless stated), limiting ruling section 63 mm
Can IS 1570 (Part 4) 20C15 Be Substituted With IS 1570 (Part 4) 27C15?
IS 1570 (Part 4) 20C15 and IS 1570 (Part 4) 27C15 overlap closely enough on chemistry and mechanical properties that IS 1570 (Part 4) 27C15 is often considered as a substitute for IS 1570 (Part 4) 20C15 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.
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IS 1570 (Part 4) 20C15
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IS 1570 (Part 4) 27C15
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Frequently Asked Questions
What is the difference between IS 1570 (Part 4) 20C15 and IS 1570 (Part 4) 27C15?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can IS 1570 (Part 4) 20C15 be substituted with IS 1570 (Part 4) 27C15?
IS 1570 (Part 4) 20C15 and IS 1570 (Part 4) 27C15 overlap closely enough on chemistry and mechanical properties that IS 1570 (Part 4) 27C15 is often considered as a substitute for IS 1570 (Part 4) 20C15 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.