Close Alternative — 83% match
based on chemical composition and mechanical property overlap.
GB/T 3077 20Mn2 (GB/T 3077:2015) and IS 11169 (Part 1) 20C10BT (IS 11169 (Part 1):2022) are both steel grades.
Both fall under the Alloy Steel category.
GB/T 3077 20Mn2 is typically used for hot-rolled or forged structural alloy steel bars, while IS 11169 (Part 1) 20C10BT 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 20Mn2 is defined under Guobiao Standards (GB/T), originating from China, while IS 11169 (Part 1) 20C10BT is defined under Bureau of Indian Standards (IS), originating from India.
As per chemical composition, GB/T 3077 20Mn2 vs IS 11169 (Part 1) 20C10BT is a 83% 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%.
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 20Mn2
IS 11169 (Part 1) 20C10BT
Tensile Strength
>=785 MPa
Not specified
Yield Strength
>=590 MPa
Not specified
Elongation
>=10%
Not specified
Hardness
<=187 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 20Mn2
Hot-rolled or forged structural alloy steel bars
IS 11169 (Part 1) 20C10BT
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)
Key Differences
GB/T 3077 20Mn2 specifies Cu which is not specified for IS 11169 (Part 1) 20C10BT.
IS 11169 (Part 1) 20C10BT specifies B which is not specified for GB/T 3077 20Mn2.
Can GB/T 3077 20Mn2 Be Substituted With IS 11169 (Part 1) 20C10BT?
GB/T 3077 20Mn2 and IS 11169 (Part 1) 20C10BT 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 20Mn2 and IS 11169 (Part 1) 20C10BT?
GB/T 3077 20Mn2 specifies Cu which is not specified for IS 11169 (Part 1) 20C10BT. IS 11169 (Part 1) 20C10BT specifies B which is not specified for GB/T 3077 20Mn2.
Can GB/T 3077 20Mn2 be substituted with IS 11169 (Part 1) 20C10BT?
GB/T 3077 20Mn2 and IS 11169 (Part 1) 20C10BT 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.