Close Alternative — 71.4% match
based on chemical composition and mechanical property overlap.
IS 1570 (Part 7) 12Cr4Mo5H (IS 1570 (Part 7):1992) and EN 10084 18CrMo4 (EN 10084:2008) are both steel grades.
Both fall under the Alloy Steel category.
IS 1570 (Part 7) 12Cr4Mo5H is typically used for boilers, pressure vessels, steam turbines, steam and water piping and other power plant equipment working at elevated temperature, while EN 10084 18CrMo4 is commonly used for case hardened machine parts: carburized or carbonitrided, then hardened (clause 3.1).
IS 1570 (Part 7) 12Cr4Mo5H is defined under Bureau of Indian Standards (IS), originating from India, while EN 10084 18CrMo4 is defined under European Standard (EN), originating from Europe.
As per chemical composition, IS 1570 (Part 7) 12Cr4Mo5H vs EN 10084 18CrMo4 is a 71.4% 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 71.4%.
Frequently Compared With IS 1570 (Part 7) 12Cr4Mo5H:
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) 12Cr4Mo5H
EN 10084 18CrMo4
Tensile Strength
440-590 MPa
Not specified
Yield Strength
>=275 MPa (0.2 % proof stress)
Not specified
Elongation
>=22%
Not specified
Condition
Pipes, N+T, thickness - (first row of Table 3)
Soft annealed
Hardenability
Not specified
+H band at 1.5 mm from the quenched end: 39 to 47 HRC
Hardness
Not specified
Soft annealed: 207 HB max
Typical Applications
IS 1570 (Part 7) 12Cr4Mo5H
Boilers, pressure vessels, steam turbines, steam and water piping and other power plant equipment working at elevated temperature
EN 10084 18CrMo4
Case hardened machine parts: carburized or carbonitrided, then hardened (clause 3.1)
Key Differences
IS 1570 (Part 7) 12Cr4Mo5H specifies Al (metallic) which is not specified for EN 10084 18CrMo4.
EN 10084 18CrMo4 specifies S which is not specified for IS 1570 (Part 7) 12Cr4Mo5H.
Can IS 1570 (Part 7) 12Cr4Mo5H Be Substituted With EN 10084 18CrMo4?
IS 1570 (Part 7) 12Cr4Mo5H and EN 10084 18CrMo4 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) 12Cr4Mo5H and EN 10084 18CrMo4?
IS 1570 (Part 7) 12Cr4Mo5H specifies Al (metallic) which is not specified for EN 10084 18CrMo4. EN 10084 18CrMo4 specifies S which is not specified for IS 1570 (Part 7) 12Cr4Mo5H.
Can IS 1570 (Part 7) 12Cr4Mo5H be substituted with EN 10084 18CrMo4?
IS 1570 (Part 7) 12Cr4Mo5H and EN 10084 18CrMo4 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.