Related Material — 69.9% match
based on chemical composition and mechanical property overlap.
IS 1875 Class 3A (IS 1875:1992) and BS 970 (Part 1) 040A10 (BS 970 (Part 1):1991) are both steel grades.
Both fall under the Carbon Steel category.
IS 1875 Class 3A is typically used for billets, blooms, slabs and bars for general engineering forgings, while BS 970 (Part 1) 040A10 is commonly used for used for bolts, studs, shafts, brackets, fabricated components, and general engineering parts..
IS 1875 Class 3A is defined under Bureau of Indian Standards (IS), originating from India, while BS 970 (Part 1) 040A10 is defined under British Standards (BS), originating from United Kingdom.
As per chemical composition, IS 1875 Class 3A vs BS 970 (Part 1) 040A10 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 related material overall at 69.9%.
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property
IS 1875 Class 3A
BS 970 (Part 1) 040A10
Tensile Strength
540 MPa min
Not specified
Yield Strength
280 MPa min
Not specified
Elongation
>=20%
Not specified
Hardness
155 HB min
Not specified
Condition
as rolled or as forged and normalised, ruling section up to 100 mm
Not specified
Normalising Temperature
850-880 °C (for information)
Not specified
Bend Test (if ordered)
32 mm square test piece bent round a 44 mm former without fracture
Not specified
Typical Applications
IS 1875 Class 3A
Billets, blooms, slabs and bars for general engineering forgings
BS 970 (Part 1) 040A10
Used for bolts, studs, shafts, brackets, fabricated components, and general engineering parts.
Key Differences
IS 1875 Class 3A specifies Si, S, P which are not specified for BS 970 (Part 1) 040A10.
Can IS 1875 Class 3A Be Substituted With BS 970 (Part 1) 040A10?
IS 1875 Class 3A and BS 970 (Part 1) 040A10 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 1875 Class 3A and BS 970 (Part 1) 040A10?
IS 1875 Class 3A specifies Si, S, P which are not specified for BS 970 (Part 1) 040A10.
Can IS 1875 Class 3A be substituted with BS 970 (Part 1) 040A10?
IS 1875 Class 3A and BS 970 (Part 1) 040A10 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.