GB/T 3077 20CrNiMo vs IS 11169 (Part 1) 21Ni2Cr2Mo2
Close Alternative — 83.2% match
based on chemical composition and mechanical property overlap.
GB/T 3077 20CrNiMo (GB/T 3077:2015) and IS 11169 (Part 1) 21Ni2Cr2Mo2 (IS 11169 (Part 1):2022) are both steel grades.
Both fall under the Alloy Steel category.
GB/T 3077 20CrNiMo is typically used for used for carburized gears, shafts, heavy-duty pinions, gearbox components, couplings, and bearings., while IS 11169 (Part 1) 21Ni2Cr2Mo2 is commonly used for cold heading and cold extrusion of parts that are case hardened; the standard covers bars, wire rods and wires of 2 to 100 mm (clause 1.1, annex b).
GB/T 3077 20CrNiMo is defined under Guobiao Standards (GB/T), originating from China, while IS 11169 (Part 1) 21Ni2Cr2Mo2 is defined under Bureau of Indian Standards (IS), originating from India.
As per chemical composition, GB/T 3077 20CrNiMo vs IS 11169 (Part 1) 21Ni2Cr2Mo2 is a 83.2% 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 83.2%.
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property
GB/T 3077 20CrNiMo
IS 11169 (Part 1) 21Ni2Cr2Mo2
Tensile Strength
>=980 MPa
Not specified
Yield Strength
>=785 MPa
Not specified
Elongation
>=9%
Not specified
Hardness
<=197 HB
Not specified
Condition
Quenched and tempered, test sample 15 mm; hardness is for bars delivered annealed or high temperature tempered
Not specified
Typical Applications
GB/T 3077 20CrNiMo
Used for carburized gears, shafts, heavy-duty pinions, gearbox components, couplings, and bearings.
IS 11169 (Part 1) 21Ni2Cr2Mo2
Cold heading and cold extrusion of parts that are case hardened; the standard covers bars, wire rods and wires of 2 to 100 mm (clause 1.1, Annex B)
Can GB/T 3077 20CrNiMo Be Substituted With IS 11169 (Part 1) 21Ni2Cr2Mo2?
GB/T 3077 20CrNiMo and IS 11169 (Part 1) 21Ni2Cr2Mo2 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 GB/T 3077 20CrNiMo and IS 11169 (Part 1) 21Ni2Cr2Mo2?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can GB/T 3077 20CrNiMo be substituted with IS 11169 (Part 1) 21Ni2Cr2Mo2?
GB/T 3077 20CrNiMo and IS 11169 (Part 1) 21Ni2Cr2Mo2 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.