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IS 1570 (Part 4) 21Cr4Mo2 vs EN 10084 18CrMoS4

Strong Match — 85.3% match based on chemical composition and mechanical property overlap.

IS 1570 (Part 4) 21Cr4Mo2 (IS 1570 (Part 4):1988) and EN 10084 18CrMoS4 (EN 10084:2008) are both steel grades. Both fall under the Alloy Steel category. IS 1570 (Part 4) 21Cr4Mo2 is defined under Bureau of Indian Standards (IS), originating from India, while EN 10084 18CrMoS4 is defined under European Standard (EN), originating from Europe.

As per chemical composition, IS 1570 (Part 4) 21Cr4Mo2 vs EN 10084 18CrMoS4 is a 85.3% match. Mechanical property data is not available for both grades, so this factor could not be scored. Combined, this makes them a strong match overall at 85.3%.

Frequently Compared With IS 1570 (Part 4) 21Cr4Mo2:
IS 1570 (Part 7) 10Cr36Mo10H IS 1570 (Part 7) 12Cr4Mo5H IS 1570 (Part 7) 10Mo6H IS 11169 (Part 1) 12Cr4Mo2 IS 1570 (Part 4) 103Cr4 IS 1570 (Part 7) 12Cr2Mo5V2H IS 1570 (Part 4) 103Cr6 IS 1570 (Part 7) 12Cr9Mo10H GOST 4543 12HN3A NF A35-565 100C6 IS 1570 (Part 4) 07Cr4Mo6 IS 1570 (Part 4) 10Mo6
Match Breakdown
CHEMISTRY MATCH
85.3%
MECHANICAL MATCH
No shared data
OVERALL
85.3%
Specifications
Property IS 1570 (Part 4) 21Cr4Mo2 EN 10084 18CrMoS4
Standard IS 1570 (Part 4):1988 EN 10084:2008
Category Alloy Steel Alloy Steel
C (%) <=0.26 0.15-0.21
Si (%) 0.10-0.35 <=0.40
Mn (%) 0.60-0.90 0.60-0.90
Cr (%) 0.90-1.20 0.90-1.20
Mo (%) 0.15-0.30 0.15-0.25
P (%) Not specified <=0.025
S (%) Not specified 0.020-0.040
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 4) 21Cr4Mo2 EN 10084 18CrMoS4
Tensile Strength 790-990 MPa Not specified
Yield Strength >=610 MPa Not specified
Condition Sheet and strip, hardened and tempered or cold rolled and tempered 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 4) 21Cr4Mo2
Not documented
EN 10084 18CrMoS4
Case hardened machine parts: carburized or carbonitrided, then hardened (clause 3.1)
Key Differences
Can IS 1570 (Part 4) 21Cr4Mo2 Be Substituted With EN 10084 18CrMoS4?
IS 1570 (Part 4) 21Cr4Mo2 and EN 10084 18CrMoS4 overlap closely enough on chemistry and mechanical properties that EN 10084 18CrMoS4 is often considered as a substitute for IS 1570 (Part 4) 21Cr4Mo2 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.
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IS 1570 (Part 4) 21Cr4Mo2
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EN 10084 18CrMoS4
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Frequently Asked Questions
What is the difference between IS 1570 (Part 4) 21Cr4Mo2 and EN 10084 18CrMoS4?
EN 10084 18CrMoS4 specifies P, S which are not specified for IS 1570 (Part 4) 21Cr4Mo2.
Can IS 1570 (Part 4) 21Cr4Mo2 be substituted with EN 10084 18CrMoS4?
IS 1570 (Part 4) 21Cr4Mo2 and EN 10084 18CrMoS4 overlap closely enough on chemistry and mechanical properties that EN 10084 18CrMoS4 is often considered as a substitute for IS 1570 (Part 4) 21Cr4Mo2 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.