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EN 10084 20NiCrMoS6-4 vs IS 4432 15Ni5Cr4Mo1-S

Close Alternative — 75.9% match based on chemical composition and mechanical property overlap.

EN 10084 20NiCrMoS6-4 (EN 10084:2008) and IS 4432 15Ni5Cr4Mo1-S (IS 4432:1988) are both steel grades. Both fall under the Alloy Steel category. EN 10084 20NiCrMoS6-4 is typically used for case hardened machine parts: carburized or carbonitrided, then hardened (clause 3.1), while IS 4432 15Ni5Cr4Mo1-S is commonly used for forgings and fabrication of case-hardened machine or automobile parts. EN 10084 20NiCrMoS6-4 is defined under European Standard (EN), originating from Europe, while IS 4432 15Ni5Cr4Mo1-S is defined under Bureau of Indian Standards (IS), originating from India.

As per chemical composition, EN 10084 20NiCrMoS6-4 vs IS 4432 15Ni5Cr4Mo1-S is a 63.8% match. As per mechanical properties, the match is 100%. Combined, this makes them a close alternative overall at 75.9%.

Frequently Compared With EN 10084 20NiCrMoS6-4:
NF A35-565 100C6 IS 1570 (Part 4) 103Cr4 IS 1570 (Part 4) 103Cr6 IS 11169 (Part 1) 10Ni5Cr4 UNI 11234 100Cr6 IS 1570 (Part 7) 10Cr36Mo10H IS 1570 (Part 4) 10Mo6 IS 1570 (Part 7) 10Mo6H IS 4367 07Cr4Mo6 IS 1570 (Part 4) 07Cr4Mo6 IS 1570 (Part 4) 105Cr5 IS 1570 (Part 4) 10Cr20Mo6
Match Breakdown
CHEMISTRY MATCH
63.8%
MECHANICAL MATCH
100%
OVERALL
75.9%
Specifications
Property EN 10084 20NiCrMoS6-4 IS 4432 15Ni5Cr4Mo1-S
Standard EN 10084:2008 IS 4432:1988
Category Alloy Steel Alloy Steel
C (%) 0.16-0.23 0.12-0.18
Cr (%) 0.60-0.90 0.75-1.25
Mn (%) 0.50-0.90 0.60-1.00
Mo (%) 0.25-0.35 0.08-0.15
Ni (%) 1.40-1.70 1.00-1.50
P (%) <=0.025 <=0.035
S (%) 0.020-0.040 0.020-0.035
Si (%) <=0.40 0.15-0.35
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 20NiCrMoS6-4 IS 4432 15Ni5Cr4Mo1-S
Condition Soft annealed Not specified
Hardenability +H band at 1.5 mm from the quenched end: 41 to 49 HRC Not specified
Hardness Soft annealed: 229 HB max Not specified
Core Tensile Strength Not specified 1050-1350 MPa (16 mm) / 1000-1350 MPa (30 mm) / 900-1200 MPa (63 mm)
Core Yield Strength Not specified >=720 MPa (16 mm) / >=700 MPa (30 mm) / >=600 MPa (63 mm)
Core Elongation Not specified >=8% (16 mm) / >=9% (30 mm) / >=11% (63 mm)
Core Reduction of Area Not specified >=35% (16 mm) / >=35% (30 mm) / >=40% (63 mm)
Hardness, annealed (A) Not specified <=229 HB
Typical Applications
EN 10084 20NiCrMoS6-4
Case hardened machine parts: carburized or carbonitrided, then hardened (clause 3.1)
IS 4432 15Ni5Cr4Mo1-S
Forgings and fabrication of case-hardened machine or automobile parts
Can EN 10084 20NiCrMoS6-4 Be Substituted With IS 4432 15Ni5Cr4Mo1-S?
EN 10084 20NiCrMoS6-4 and IS 4432 15Ni5Cr4Mo1-S 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.
On M-EX Right Now
EN 10084 20NiCrMoS6-4
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IS 4432 15Ni5Cr4Mo1-S
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Frequently Asked Questions
What is the difference between EN 10084 20NiCrMoS6-4 and IS 4432 15Ni5Cr4Mo1-S?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can EN 10084 20NiCrMoS6-4 be substituted with IS 4432 15Ni5Cr4Mo1-S?
EN 10084 20NiCrMoS6-4 and IS 4432 15Ni5Cr4Mo1-S 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.