Strong Match — 96.2% match
based on chemical composition and mechanical property overlap.
IS 11169 (Part 1) 45C8 (IS 11169 (Part 1):2022) and IS 11169 (Part 1) 40C8 (IS 11169 (Part 1):2022) are both steel grades.
Both fall under the Carbon Steel category.
IS 11169 (Part 1) 45C8 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 IS 11169 (Part 1) 40C8 is commonly 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).
IS 11169 (Part 1) 45C8 is defined under Bureau of Indian Standards (IS), originating from India, while IS 11169 (Part 1) 40C8 is defined under Bureau of Indian Standards (IS), originating from India.
As per chemical composition, IS 11169 (Part 1) 45C8 vs IS 11169 (Part 1) 40C8 is a 94.3% match.
As per mechanical properties, the match is 100%.
Combined, this makes them a strong match overall at 96.2%.
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) 45C8
IS 11169 (Part 1) 40C8
Core Hardness (CH)
>=40 HRC up to 12 mm
>=40 HRC up to 11 mm
Hardness, annealed (+AC)
<=170 HBW
<=170 HBW
Typical Applications
IS 11169 (Part 1) 45C8
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)
IS 11169 (Part 1) 40C8
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)
Can IS 11169 (Part 1) 45C8 Be Substituted With IS 11169 (Part 1) 40C8?
IS 11169 (Part 1) 45C8 and IS 11169 (Part 1) 40C8 overlap closely enough on chemistry and mechanical properties that IS 11169 (Part 1) 40C8 is often considered as a substitute for IS 11169 (Part 1) 45C8 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.
What is the difference between IS 11169 (Part 1) 45C8 and IS 11169 (Part 1) 40C8?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can IS 11169 (Part 1) 45C8 be substituted with IS 11169 (Part 1) 40C8?
IS 11169 (Part 1) 45C8 and IS 11169 (Part 1) 40C8 overlap closely enough on chemistry and mechanical properties that IS 11169 (Part 1) 40C8 is often considered as a substitute for IS 11169 (Part 1) 45C8 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.