Minimal Match — 35% match
based on chemical composition and mechanical property overlap.
IS 11169 (Part 1) 40C15 (IS 11169 (Part 1):2022) and BS 970 (Part 1) 055M15 (BS 970 (Part 1):1991) are both steel grades.
Both fall under the Carbon Steel category.
IS 11169 (Part 1) 40C15 is typically used for cold heading and cold extrusion of parts that are quenched and tempered; the standard covers bars, wire rods and wires of 2 to 100 mm (clause 1.1, annex c), while BS 970 (Part 1) 055M15 is commonly used for as-rolled, or as-rolled and softened, steel (section two).
IS 11169 (Part 1) 40C15 is defined under Bureau of Indian Standards (IS), originating from India, while BS 970 (Part 1) 055M15 is defined under British Standards (BS), originating from United Kingdom.
As per chemical composition, IS 11169 (Part 1) 40C15 vs BS 970 (Part 1) 055M15 is a 67.4% match.
Mechanical property data is not available for both grades, so this factor could not be scored.
Combined, this makes them a minimal match overall at 35%.
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property
IS 11169 (Part 1) 40C15
BS 970 (Part 1) 055M15
Condition
Not specified
As-rolled
Tensile Strength
Not specified
310 MPa min
Elongation
Not specified
25 % min
Hardness
Not specified
121 HB min
Typical Applications
IS 11169 (Part 1) 40C15
Cold heading and cold extrusion of parts that are quenched and tempered; the standard covers bars, wire rods and wires of 2 to 100 mm (clause 1.1, Annex C)
BS 970 (Part 1) 055M15
As-rolled, or as-rolled and softened, steel (section two)
Key Differences
IS 11169 (Part 1) 40C15 specifies Cr, Cu, Mo, Ni which are not specified for BS 970 (Part 1) 055M15.
Can IS 11169 (Part 1) 40C15 Be Substituted With BS 970 (Part 1) 055M15?
IS 11169 (Part 1) 40C15 and BS 970 (Part 1) 055M15 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.
What is the difference between IS 11169 (Part 1) 40C15 and BS 970 (Part 1) 055M15?
IS 11169 (Part 1) 40C15 specifies Cr, Cu, Mo, Ni which are not specified for BS 970 (Part 1) 055M15.
Can IS 11169 (Part 1) 40C15 be substituted with BS 970 (Part 1) 055M15?
IS 11169 (Part 1) 40C15 and BS 970 (Part 1) 055M15 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.