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IS 1570 (Part 4):1988 11C15 Steel: Specifications & Listings

IS 1570 (Part 4):1988 11C15: 11C15: alloy steel (constructional or spring group) with specified chemical composition. Specified in IS 1570 (Part 4):1988.

Category: Carbon Steel
Grade Details
GradeIS 1570 (Part 4):1988 11C15
Standard IS 1570 (Part 4):1988
Equivalent / Similar Grades
Grade Standard Region Live on M-EX
IS 11169 (Part 1) 11C15 IS 11169 (Part 1):2022 India No activity yet
BS 970 (Part 3) 150M19 BS 970 (Part 3):1991 UK No activity yet
Grade ComparisonCompare With a Specific Grade →
Grade Standard Match
IS 11169 (Part 1) 20C15 IS 11169 (Part 1):1984 Strong Match
BS 970 (Part 3) 150M19 BS 970 (Part 3):1991 Strong Match
BS 970 (Part 1) 150M19 BS 970 (Part 1):1983 Strong Match
SAE J403 1008 SAE J403:2014 Strong Match
IS 11169 (Part 1) 27C15 IS 11169 (Part 1):1984 Close Alternative
IS 11169 (Part 1) 30C8 IS 11169 (Part 1):1984 Close Alternative
BS 970 (Part 3) 080A15 BS 970 (Part 3):1991 Close Alternative
BS 970 (Part 3) 080M15 BS 970 (Part 3):1991 Close Alternative
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Chemical Composition (%)
C Si Mn
<=0.16 0.10-0.35 1.30-1.70
Mechanical Properties
Tensile Strength 460-560 MPa
Yield Strength >=270 MPa (0.2 % proof stress, if specified)
Elongation >=26%
Condition Hot rolled or normalized, limiting ruling section 100 mm

More data from IS 1570 (Part 4):1988

From the standard
Tensile limits, hot rolled or normalized 2 ruling sections
Limiting ruling section (mm)Tensile strength (MPa)0.2 % proof stress, min, if specified (MPa)Elongation, min (%)
100460-56027026
over 100 to 150430-53025026
Plates, sections, bars, billets and forgings in the hot rolled or normalized condition.
Source: IS 1570 (Part 4):1988, Table 2
Core properties, case hardening steel, refined and quenched core properties
Tensile strength, min
590 MPa
Elongation, min
17%
Izod impact, min
55 J
If core strength exceeds 1 000 MPa the ruling section may equal the test piece diameter.
Source: IS 1570 (Part 4):1988, Table 9

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