Close Alternative — 80% match
based on chemical composition and mechanical property overlap.
IS 11169 (Part 1) 20C8 (IS 11169 (Part 1):1984) and BS 970 (Part 3) 045M10 (BS 970 (Part 3):1991) are both steel grades.
Both fall under the Carbon Steel category.
IS 11169 (Part 1) 20C8 is typically used for cold heading and cold extrusion; the standard covers wires, wire rods and bars of 2 to 100 mm diameter (clause 1.1), while BS 970 (Part 3) 045M10 is commonly used for bright cold finished bars (cold drawn, turned or precision ground) for general engineering purposes, in straight lengths; case hardening steel, carbon and carbon manganese (table 14).
IS 11169 (Part 1) 20C8 is defined under Bureau of Indian Standards (IS), originating from India, while BS 970 (Part 3) 045M10 is defined under British Standards (BS), originating from United Kingdom.
As per chemical composition, IS 11169 (Part 1) 20C8 vs BS 970 (Part 3) 045M10 is a 80% match.
Mechanical property data is not available for both grades, so this factor could not be scored.
Combined, this makes them a close alternative overall at 80%.
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) 20C8
BS 970 (Part 3) 045M10
Tensile Strength (hardened and tempered)
540-690 MPa (16 mm) / 490-640 MPa (40 mm)
Not specified
0.2% Proof Stress
>=370 MPa (16 mm) / >=295 MPa (40 mm)
Not specified
Elongation
>=20% (16 mm) / >=22% (40 mm)
Not specified
Hardness, annealed
<=150 HB
Not specified
Typical Applications
IS 11169 (Part 1) 20C8
Cold heading and cold extrusion; the standard covers wires, wire rods and bars of 2 to 100 mm diameter (clause 1.1)
BS 970 (Part 3) 045M10
Bright cold finished bars (cold drawn, turned or precision ground) for general engineering purposes, in straight lengths; case hardening steel, carbon and carbon manganese (Table 14)
Key Differences
BS 970 (Part 3) 045M10 specifies Si, P, S which are not specified for IS 11169 (Part 1) 20C8.
Can IS 11169 (Part 1) 20C8 Be Substituted With BS 970 (Part 3) 045M10?
IS 11169 (Part 1) 20C8 and BS 970 (Part 3) 045M10 are a close alternative rather than a direct substitute. Some properties overlap well, but check the specific chemistry and mechanical rows above against your application's requirements before treating them as interchangeable.
What is the difference between IS 11169 (Part 1) 20C8 and BS 970 (Part 3) 045M10?
BS 970 (Part 3) 045M10 specifies Si, P, S which are not specified for IS 11169 (Part 1) 20C8.
Can IS 11169 (Part 1) 20C8 be substituted with BS 970 (Part 3) 045M10?
IS 11169 (Part 1) 20C8 and BS 970 (Part 3) 045M10 are a close alternative rather than a direct substitute. Some properties overlap well, but check the specific chemistry and mechanical rows above against your application's requirements before treating them as interchangeable.