Close Alternative — 70.6% match
based on chemical composition and mechanical property overlap.
EN 10084 18CrMoS4 (EN 10084:2008) and IS 1570 (Part 7) 12Cr4Mo5H (IS 1570 (Part 7):1992) are both steel grades.
Both fall under the Alloy Steel category.
EN 10084 18CrMoS4 is typically used for case hardened machine parts: carburized or carbonitrided, then hardened (clause 3.1), while IS 1570 (Part 7) 12Cr4Mo5H is commonly used for boilers, pressure vessels, steam turbines, steam and water piping and other power plant equipment working at elevated temperature.
EN 10084 18CrMoS4 is defined under European Standard (EN), originating from Europe, while IS 1570 (Part 7) 12Cr4Mo5H is defined under Bureau of Indian Standards (IS), originating from India.
As per chemical composition, EN 10084 18CrMoS4 vs IS 1570 (Part 7) 12Cr4Mo5H is a 70.6% 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 70.6%.
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property
EN 10084 18CrMoS4
IS 1570 (Part 7) 12Cr4Mo5H
Condition
Soft annealed
Pipes, N+T, thickness - (first row of Table 3)
Hardenability
+H band at 1.5 mm from the quenched end: 39 to 47 HRC
Not specified
Hardness
Soft annealed: 207 HB max
Not specified
Tensile Strength
Not specified
440-590 MPa
Yield Strength
Not specified
>=275 MPa (0.2 % proof stress)
Elongation
Not specified
>=22%
Typical Applications
EN 10084 18CrMoS4
Case hardened machine parts: carburized or carbonitrided, then hardened (clause 3.1)
IS 1570 (Part 7) 12Cr4Mo5H
Boilers, pressure vessels, steam turbines, steam and water piping and other power plant equipment working at elevated temperature
Key Differences
EN 10084 18CrMoS4 specifies S which is not specified for IS 1570 (Part 7) 12Cr4Mo5H.
IS 1570 (Part 7) 12Cr4Mo5H specifies Al (metallic) which is not specified for EN 10084 18CrMoS4.
Can EN 10084 18CrMoS4 Be Substituted With IS 1570 (Part 7) 12Cr4Mo5H?
EN 10084 18CrMoS4 and IS 1570 (Part 7) 12Cr4Mo5H 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 EN 10084 18CrMoS4 and IS 1570 (Part 7) 12Cr4Mo5H?
EN 10084 18CrMoS4 specifies S which is not specified for IS 1570 (Part 7) 12Cr4Mo5H. IS 1570 (Part 7) 12Cr4Mo5H specifies Al (metallic) which is not specified for EN 10084 18CrMoS4.
Can EN 10084 18CrMoS4 be substituted with IS 1570 (Part 7) 12Cr4Mo5H?
EN 10084 18CrMoS4 and IS 1570 (Part 7) 12Cr4Mo5H 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.