Close Alternative — 72.2% match
based on chemical composition and mechanical property overlap.
IS 1570 (Part 7) 40CrMoH (IS 1570 (Part 7):1992) and SAE J404 4140 (SAE J404:2009) 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 SAE J404 4140 is commonly used for gears, shafts, dies, bolts, crankshafts.
IS 1570 (Part 7) 40CrMoH is defined under Bureau of Indian Standards (IS), originating from India, while SAE J404 4140 is defined under SAE International, originating from United States.
As per chemical composition, IS 1570 (Part 7) 40CrMoH vs SAE J404 4140 is a 72.2% 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 72.2%.
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
SAE J404 4140
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
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
SAE J404 4140
Gears, shafts, dies, bolts, crankshafts
Can IS 1570 (Part 7) 40CrMoH Be Substituted With SAE J404 4140?
IS 1570 (Part 7) 40CrMoH and SAE J404 4140 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 SAE J404 4140?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can IS 1570 (Part 7) 40CrMoH be substituted with SAE J404 4140?
IS 1570 (Part 7) 40CrMoH and SAE J404 4140 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.