Close Alternative — 82.2% match
based on chemical composition and mechanical property overlap.
EN 10084 20MoCr3 (EN 10084:2008) and IS 4432 21Cr4Mo2 (IS 4432:1988) are both steel grades.
Both fall under the Alloy Steel category.
EN 10084 20MoCr3 is typically used for case hardened machine parts: carburized or carbonitrided, then hardened (clause 3.1), while IS 4432 21Cr4Mo2 is commonly used for forgings and fabrication of case-hardened machine or automobile parts.
EN 10084 20MoCr3 is defined under European Standard (EN), originating from Europe, while IS 4432 21Cr4Mo2 is defined under Bureau of Indian Standards (IS), originating from India.
As per chemical composition, EN 10084 20MoCr3 vs IS 4432 21Cr4Mo2 is a 73.3% match.
As per mechanical properties, the match is 100%.
Combined, this makes them a close alternative overall at 82.2%.
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 20MoCr3
IS 4432 21Cr4Mo2
Condition
Soft annealed
Not specified
Hardenability
+H band at 1.5 mm from the quenched end: 41 to 49 HRC
Case hardened machine parts: carburized or carbonitrided, then hardened (clause 3.1)
IS 4432 21Cr4Mo2
Forgings and fabrication of case-hardened machine or automobile parts
Can EN 10084 20MoCr3 Be Substituted With IS 4432 21Cr4Mo2?
EN 10084 20MoCr3 and IS 4432 21Cr4Mo2 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 20MoCr3 and IS 4432 21Cr4Mo2?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can EN 10084 20MoCr3 be substituted with IS 4432 21Cr4Mo2?
EN 10084 20MoCr3 and IS 4432 21Cr4Mo2 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.