Related Material — 69.9% match
based on chemical composition and mechanical property overlap.
IS 11169 (Part 1) 41Cr3 (IS 11169 (Part 1):2022) and AISI 4340 are both steel grades.
Both fall under the Alloy Steel category.
IS 11169 (Part 1) 41Cr3 is typically 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), while AISI 4340 is commonly used for aircraft parts, heavy duty gears, crankshafts, high tensile bolts.
IS 11169 (Part 1) 41Cr3 is defined under Bureau of Indian Standards (IS), originating from India, while AISI 4340 is defined under AISI, originating from United States.
As per chemical composition, IS 11169 (Part 1) 41Cr3 vs AISI 4340 is a 74.9% 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 11169 (Part 1) 41Cr3
AISI 4340
Condition
Not specified
Quenched & Tempered
Tensile Strength
Not specified
1000–1200 MPa
Yield Strength
Not specified
≥830 MPa
Elongation
Not specified
≥12%
Hardness
Not specified
285–341 HB
Typical Applications
IS 11169 (Part 1) 41Cr3
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)
AISI 4340
Aircraft parts, heavy duty gears, crankshafts, high tensile bolts
Key Differences
IS 11169 (Part 1) 41Cr3 specifies Cu, P, S which are not specified for AISI 4340.
Can IS 11169 (Part 1) 41Cr3 Be Substituted With AISI 4340?
IS 11169 (Part 1) 41Cr3 and AISI 4340 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 11169 (Part 1) 41Cr3 and AISI 4340?
IS 11169 (Part 1) 41Cr3 specifies Cu, P, S which are not specified for AISI 4340.
Can IS 11169 (Part 1) 41Cr3 be substituted with AISI 4340?
IS 11169 (Part 1) 41Cr3 and AISI 4340 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.