Strong Match — 87.9% match
based on chemical composition and mechanical property overlap.
IS 1875 Class 1 (IS 1875:1992) and BS 970 (Part 3) 045M10 (BS 970 (Part 3):1991) are both steel grades.
Both fall under the Carbon Steel category.
IS 1875 Class 1 is typically used for billets, blooms, slabs and bars for general engineering forgings, 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 1875 Class 1 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 1875 Class 1 vs BS 970 (Part 3) 045M10 is a 87.9% match.
Mechanical property data is not available for both grades, so this factor could not be scored.
Combined, this makes them a strong match overall at 87.9%.
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 1
BS 970 (Part 3) 045M10
Tensile Strength
370 MPa min
Not specified
Yield Strength
200 MPa min
Not specified
Elongation
>=26%
Not specified
Hardness
100 HB min
Not specified
Condition
as rolled or as forged and normalised, ruling section up to 100 mm
Not specified
Normalising Temperature
880-910 °C (for information)
Not specified
Bend Test (if ordered)
32 mm square test piece bent round a 38 mm former without fracture
Not specified
Typical Applications
IS 1875 Class 1
Billets, blooms, slabs and bars for general engineering forgings
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)
Can IS 1875 Class 1 Be Substituted With BS 970 (Part 3) 045M10?
IS 1875 Class 1 and BS 970 (Part 3) 045M10 overlap closely enough on chemistry and mechanical properties that BS 970 (Part 3) 045M10 is often considered as a substitute for IS 1875 Class 1 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 1875 Class 1 and BS 970 (Part 3) 045M10?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can IS 1875 Class 1 be substituted with BS 970 (Part 3) 045M10?
IS 1875 Class 1 and BS 970 (Part 3) 045M10 overlap closely enough on chemistry and mechanical properties that BS 970 (Part 3) 045M10 is often considered as a substitute for IS 1875 Class 1 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.