Close Alternative — 78.9% match
based on chemical composition and mechanical property overlap.
IS 1570 C20 (IS 1570:1961) and BS 970 (Part 1) 040A12 (BS 970 (Part 1):1991) are both steel grades.
Both fall under the Carbon Steel category.
IS 1570 C20 is typically used for shafts, studs, pins, forged components, machinery parts, carburized parts, while BS 970 (Part 1) 040A12 is commonly used for as-rolled, or as-rolled and softened, steel (section two).
IS 1570 C20 is defined under Bureau of Indian Standards (IS), originating from India, while BS 970 (Part 1) 040A12 is defined under British Standards (BS), originating from United Kingdom.
As per chemical composition, IS 1570 C20 vs BS 970 (Part 1) 040A12 is a 78.9% 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 78.9%.
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 C20
BS 970 (Part 1) 040A12
Tensile Strength
440-520 MPa
Not specified
Yield Strength
>=242 MPa
Not specified
Elongation
>=24%
Not specified
Hardness
121-156 HB
Not specified
Typical Applications
IS 1570 C20
shafts, studs, pins, forged components, machinery parts, carburized parts
BS 970 (Part 1) 040A12
As-rolled, or as-rolled and softened, steel (section two)
Key Differences
IS 1570 C20 specifies Si, S, P which are not specified for BS 970 (Part 1) 040A12.
Can IS 1570 C20 Be Substituted With BS 970 (Part 1) 040A12?
IS 1570 C20 and BS 970 (Part 1) 040A12 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 1570 C20 and BS 970 (Part 1) 040A12?
IS 1570 C20 specifies Si, S, P which are not specified for BS 970 (Part 1) 040A12.
Can IS 1570 C20 be substituted with BS 970 (Part 1) 040A12?
IS 1570 C20 and BS 970 (Part 1) 040A12 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.