Related Material — 69.9% match
based on chemical composition and mechanical property overlap.
BS 970 EN37 (BS 970:1955) and IS 11169 (Part 1) 40Ni4 (IS 11169 (Part 1):2022) are both steel grades.
Both fall under the Alloy Steel category.
BS 970 EN37 is typically used for bars and billets for forging; forgings and drop-forgings; bars for machining; bright bars. suitable for tensile strength of 40 tons/sq in min., while IS 11169 (Part 1) 40Ni4 is commonly used for cold heading and cold extrusion of parts that are quenched and tempered; the standard covers bars, wire rods and wires of 2 to 100 mm (clause 1.1, annex c).
BS 970 EN37 is defined under British Standards (BS), originating from United Kingdom, while IS 11169 (Part 1) 40Ni4 is defined under Bureau of Indian Standards (IS), originating from India.
As per chemical composition, BS 970 EN37 vs IS 11169 (Part 1) 40Ni4 is a 73.5% 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
BS 970 EN37
IS 11169 (Part 1) 40Ni4
Tensile Strength
≥618 MPa (40 tons/sq in, converted)
Not specified
Elongation
≥20%
Not specified
Condition
Core, after heat treatment (lowest-strength condition of the standard)
Not specified
Hardness, annealed (+AC)
Not specified
<=190 HBW
Typical Applications
BS 970 EN37
Bars and billets for forging; forgings and drop-forgings; bars for machining; bright bars. Suitable for tensile strength of 40 tons/sq in min.
IS 11169 (Part 1) 40Ni4
Cold heading and cold extrusion of parts that are quenched and tempered; the standard covers bars, wire rods and wires of 2 to 100 mm (clause 1.1, Annex C)
Key Differences
IS 11169 (Part 1) 40Ni4 specifies Cu, Mo which are not specified for BS 970 EN37.
Can BS 970 EN37 Be Substituted With IS 11169 (Part 1) 40Ni4?
BS 970 EN37 and IS 11169 (Part 1) 40Ni4 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 BS 970 EN37 and IS 11169 (Part 1) 40Ni4?
IS 11169 (Part 1) 40Ni4 specifies Cu, Mo which are not specified for BS 970 EN37.
Can BS 970 EN37 be substituted with IS 11169 (Part 1) 40Ni4?
BS 970 EN37 and IS 11169 (Part 1) 40Ni4 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.