Close Alternative — 78.3% match
based on chemical composition and mechanical property overlap.
IS 4432 15C8 (IS 4432:1988) and BS 970 (Part 1) 040A04 (BS 970 (Part 1):1991) are both steel grades.
Both fall under the Carbon Steel category.
IS 4432 15C8 is typically used for forgings and fabrication of case-hardened machine or automobile parts, while BS 970 (Part 1) 040A04 is commonly used for as-rolled, or as-rolled and softened, steel (section two).
IS 4432 15C8 is defined under Bureau of Indian Standards (IS), originating from India, while BS 970 (Part 1) 040A04 is defined under British Standards (BS), originating from United Kingdom.
As per chemical composition, IS 4432 15C8 vs BS 970 (Part 1) 040A04 is a 78.3% 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 78.3%.
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property
IS 4432 15C8
BS 970 (Part 1) 040A04
Core Tensile Strength
600-850 MPa (16 mm) / 550-800 MPa (30 mm)
Not specified
Core Yield Strength
>=400 MPa (16 mm) / >=330 MPa (30 mm)
Not specified
Core Elongation
>=12% (16 mm) / >=14% (30 mm)
Not specified
Core Reduction of Area
>=35% (16 mm) / >=40% (30 mm)
Not specified
Hardness, annealed (A)
<=150 HB
Not specified
Typical Applications
IS 4432 15C8
Forgings and fabrication of case-hardened machine or automobile parts
BS 970 (Part 1) 040A04
As-rolled, or as-rolled and softened, steel (section two)
Key Differences
IS 4432 15C8 specifies Si, S, P which are not specified for BS 970 (Part 1) 040A04.
Can IS 4432 15C8 Be Substituted With BS 970 (Part 1) 040A04?
IS 4432 15C8 and BS 970 (Part 1) 040A04 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 4432 15C8 and BS 970 (Part 1) 040A04?
IS 4432 15C8 specifies Si, S, P which are not specified for BS 970 (Part 1) 040A04.
Can IS 4432 15C8 be substituted with BS 970 (Part 1) 040A04?
IS 4432 15C8 and BS 970 (Part 1) 040A04 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.