IS 1570 (Part 7) 15Mo6H vs IS 11169 (Part 1) 35Mn6Mo4
Close Alternative — 77.6% match
based on chemical composition and mechanical property overlap.
IS 1570 (Part 7) 15Mo6H (IS 1570 (Part 7):1992) and IS 11169 (Part 1) 35Mn6Mo4 (IS 11169 (Part 1):1984) are both steel grades.
Both fall under the Alloy Steel category.
IS 1570 (Part 7) 15Mo6H is typically used for boilers, pressure vessels, steam turbines, steam and water piping and other power plant equipment working at elevated temperature, while IS 11169 (Part 1) 35Mn6Mo4 is commonly used for cold heading and cold extrusion; the standard covers wires, wire rods and bars of 2 to 100 mm diameter (clause 1.1).
IS 1570 (Part 7) 15Mo6H is defined under Bureau of Indian Standards (IS), originating from India, while IS 11169 (Part 1) 35Mn6Mo4 is defined under Bureau of Indian Standards (IS), originating from India.
As per chemical composition, IS 1570 (Part 7) 15Mo6H vs IS 11169 (Part 1) 35Mn6Mo4 is a 77.6% 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 77.6%.
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property
IS 1570 (Part 7) 15Mo6H
IS 11169 (Part 1) 35Mn6Mo4
Tensile Strength
>=380 MPa
Not specified
Yield Strength
>=205 MPa (0.2 % proof stress)
Not specified
Elongation
>=22%
Not specified
Condition
Tubes, N+T, thickness - (first row of Table 3)
Not specified
Hardness, annealed
Not specified
<=190 HB
Typical Applications
IS 1570 (Part 7) 15Mo6H
Boilers, pressure vessels, steam turbines, steam and water piping and other power plant equipment working at elevated temperature
IS 11169 (Part 1) 35Mn6Mo4
Cold heading and cold extrusion; the standard covers wires, wire rods and bars of 2 to 100 mm diameter (clause 1.1)
Key Differences
IS 1570 (Part 7) 15Mo6H specifies P, S which are not specified for IS 11169 (Part 1) 35Mn6Mo4.
Can IS 1570 (Part 7) 15Mo6H Be Substituted With IS 11169 (Part 1) 35Mn6Mo4?
IS 1570 (Part 7) 15Mo6H and IS 11169 (Part 1) 35Mn6Mo4 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 1570 (Part 7) 15Mo6H and IS 11169 (Part 1) 35Mn6Mo4?
IS 1570 (Part 7) 15Mo6H specifies P, S which are not specified for IS 11169 (Part 1) 35Mn6Mo4.
Can IS 1570 (Part 7) 15Mo6H be substituted with IS 11169 (Part 1) 35Mn6Mo4?
IS 1570 (Part 7) 15Mo6H and IS 11169 (Part 1) 35Mn6Mo4 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.