Close Alternative — 70.1% match
based on chemical composition and mechanical property overlap.
IS 11169 (Part 1) 31Cr2Mo1BT (IS 11169 (Part 1):2022) and SAE J404 4120 (SAE J404:2009) are both steel grades.
Both fall under the Alloy Steel category.
IS 11169 (Part 1) 31Cr2Mo1BT 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 SAE J404 4120 is commonly used for used for gears, crankshafts, studs, pins, machinery parts, and transmission components..
IS 11169 (Part 1) 31Cr2Mo1BT is defined under Bureau of Indian Standards (IS), originating from India, while SAE J404 4120 is defined under SAE International, originating from United States.
As per chemical composition, IS 11169 (Part 1) 31Cr2Mo1BT vs SAE J404 4120 is a 70.1% 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 70.1%.
Frequently Compared With IS 11169 (Part 1) 31Cr2Mo1BT:
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) 31Cr2Mo1BT
SAE J404 4120
Core Hardness (CH)
>=45 HRC up to 30 mm
Not specified
Tensile Strength, annealed (+AC)
<=570 MPa (over 5 to 40 mm)
Not specified
Typical Applications
IS 11169 (Part 1) 31Cr2Mo1BT
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)
SAE J404 4120
Used for gears, crankshafts, studs, pins, machinery parts, and transmission components.
Key Differences
IS 11169 (Part 1) 31Cr2Mo1BT specifies B, Cu which are not specified for SAE J404 4120.
Can IS 11169 (Part 1) 31Cr2Mo1BT Be Substituted With SAE J404 4120?
IS 11169 (Part 1) 31Cr2Mo1BT and SAE J404 4120 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 11169 (Part 1) 31Cr2Mo1BT and SAE J404 4120?
IS 11169 (Part 1) 31Cr2Mo1BT specifies B, Cu which are not specified for SAE J404 4120.
Can IS 11169 (Part 1) 31Cr2Mo1BT be substituted with SAE J404 4120?
IS 11169 (Part 1) 31Cr2Mo1BT and SAE J404 4120 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.