Close Alternative — 81% match
based on chemical composition and mechanical property overlap.
IS 4432 21Cr4Mo2 (IS 4432:1988) and EN 10084 20MoCrS3 (EN 10084:2008) are both steel grades.
Both fall under the Alloy Steel category.
IS 4432 21Cr4Mo2 is typically used for forgings and fabrication of case-hardened machine or automobile parts, while EN 10084 20MoCrS3 is commonly used for case hardened machine parts: carburized or carbonitrided, then hardened (clause 3.1).
IS 4432 21Cr4Mo2 is defined under Bureau of Indian Standards (IS), originating from India, while EN 10084 20MoCrS3 is defined under European Standard (EN), originating from Europe.
As per chemical composition, IS 4432 21Cr4Mo2 vs EN 10084 20MoCrS3 is a 71.5% match.
As per mechanical properties, the match is 100%.
Combined, this makes them a close alternative overall at 81%.
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
+H band at 1.5 mm from the quenched end: 41 to 49 HRC
Hardness
Not specified
Soft annealed: 217 HB max
Typical Applications
IS 4432 21Cr4Mo2
Forgings and fabrication of case-hardened machine or automobile parts
EN 10084 20MoCrS3
Case hardened machine parts: carburized or carbonitrided, then hardened (clause 3.1)
Can IS 4432 21Cr4Mo2 Be Substituted With EN 10084 20MoCrS3?
IS 4432 21Cr4Mo2 and EN 10084 20MoCrS3 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 4432 21Cr4Mo2 and EN 10084 20MoCrS3?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can IS 4432 21Cr4Mo2 be substituted with EN 10084 20MoCrS3?
IS 4432 21Cr4Mo2 and EN 10084 20MoCrS3 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.