IS 1570 (Part 7) 40CrMoH vs IS 11169 (Part 1) 40Cr4Mo3
Close Alternative — 81% match
based on chemical composition and mechanical property overlap.
IS 1570 (Part 7) 40CrMoH (IS 1570 (Part 7):1992) and IS 11169 (Part 1) 40Cr4Mo3 (IS 11169 (Part 1):2022) are both steel grades.
Both fall under the Alloy Steel category.
IS 1570 (Part 7) 40CrMoH 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) 40Cr4Mo3 is commonly 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).
IS 1570 (Part 7) 40CrMoH is defined under Bureau of Indian Standards (IS), originating from India, while IS 11169 (Part 1) 40Cr4Mo3 is defined under Bureau of Indian Standards (IS), originating from India.
As per chemical composition, IS 1570 (Part 7) 40CrMoH vs IS 11169 (Part 1) 40Cr4Mo3 is a 81% 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 81%.
Frequently Compared With IS 1570 (Part 7) 40CrMoH:
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) 40CrMoH
IS 11169 (Part 1) 40Cr4Mo3
Tensile Strength
850-1000 MPa
Not specified
Yield Strength
>=635 MPa (0.2 % proof stress)
Not specified
Elongation
>=14%
Not specified
Condition
Bars, forgings, Q+T, thickness up to 200 (first row of Table 3)
Not specified
Core Hardness (CH)
Not specified
>=48 HRC up to 28 mm
Hardness, annealed (+AC)
Not specified
<=200 HBW
Typical Applications
IS 1570 (Part 7) 40CrMoH
Boilers, pressure vessels, steam turbines, steam and water piping and other power plant equipment working at elevated temperature
IS 11169 (Part 1) 40Cr4Mo3
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)
Key Differences
IS 11169 (Part 1) 40Cr4Mo3 specifies Cu which is not specified for IS 1570 (Part 7) 40CrMoH.
Can IS 1570 (Part 7) 40CrMoH Be Substituted With IS 11169 (Part 1) 40Cr4Mo3?
IS 1570 (Part 7) 40CrMoH and IS 11169 (Part 1) 40Cr4Mo3 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) 40CrMoH and IS 11169 (Part 1) 40Cr4Mo3?
IS 11169 (Part 1) 40Cr4Mo3 specifies Cu which is not specified for IS 1570 (Part 7) 40CrMoH.
Can IS 1570 (Part 7) 40CrMoH be substituted with IS 11169 (Part 1) 40Cr4Mo3?
IS 1570 (Part 7) 40CrMoH and IS 11169 (Part 1) 40Cr4Mo3 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.