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EN 10084 18CrNiMo7-6 vs IS 4432 20Ni7Cr2Mo2-S

Close Alternative — 76.7% match based on chemical composition and mechanical property overlap.

EN 10084 18CrNiMo7-6 (EN 10084:2008) and IS 4432 20Ni7Cr2Mo2-S (IS 4432:1988) are both steel grades. Both fall under the Alloy Steel category. EN 10084 18CrNiMo7-6 is typically used for case hardened machine parts: carburized or carbonitrided, then hardened (clause 3.1), while IS 4432 20Ni7Cr2Mo2-S is commonly used for forgings and fabrication of case-hardened machine or automobile parts. EN 10084 18CrNiMo7-6 is defined under European Standard (EN), originating from Europe, while IS 4432 20Ni7Cr2Mo2-S is defined under Bureau of Indian Standards (IS), originating from India.

As per chemical composition, EN 10084 18CrNiMo7-6 vs IS 4432 20Ni7Cr2Mo2-S is a 65.1% match. As per mechanical properties, the match is 100%. Combined, this makes them a close alternative overall at 76.7%.

Frequently Compared With EN 10084 18CrNiMo7-6:
IS 1570 (Part 4) 103Cr4 IS 1570 (Part 4) 105Cr5 IS 1570 (Part 4) 10Cr20Mo6 IS 4367 10Cr9Mo10 IS 4367 07Cr4Mo6 IS 1570 (Part 4) 07Cr4Mo6 NF A35-565 100C6 UNI 11234 100Cr6 IS 1570 (Part 4) 103Cr6 IS 1570 (Part 7) 10Cr36Mo10H IS 1570 (Part 4) 10Mo6 IS 1570 (Part 7) 10Mo6H
Match Breakdown
CHEMISTRY MATCH
65.1%
MECHANICAL MATCH
100%
OVERALL
76.7%
Specifications
Property EN 10084 18CrNiMo7-6 IS 4432 20Ni7Cr2Mo2-S
Standard EN 10084:2008 IS 4432:1988
Category Alloy Steel Alloy Steel
C (%) 0.15-0.21 0.17-0.22
Cr (%) 1.50-1.80 0.40-0.60
Mn (%) 0.50-0.90 0.45-0.65
Mo (%) 0.25-0.35 0.20-0.30
Ni (%) 1.40-1.70 1.65-2.00
P (%) <=0.025 <=0.035
S (%) <=0.035 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 18CrNiMo7-6 IS 4432 20Ni7Cr2Mo2-S
Condition Soft annealed Not specified
Hardenability +H band at 1.5 mm from the quenched end: 40 to 48 HRC Not specified
Hardness Soft annealed: 229 HB max Not specified
Core Tensile Strength Not specified 950-1350 MPa (16 mm) / 850-1200 MPa (30 mm) / 800-1150 MPa (63 mm)
Core Yield Strength Not specified >=650 MPa (16 mm) / >=600 MPa (30 mm) / >=550 MPa (63 mm)
Core Elongation Not specified >=8% (16 mm) / >=9% (30 mm) / >=10% (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 18CrNiMo7-6
Case hardened machine parts: carburized or carbonitrided, then hardened (clause 3.1)
IS 4432 20Ni7Cr2Mo2-S
Forgings and fabrication of case-hardened machine or automobile parts
Can EN 10084 18CrNiMo7-6 Be Substituted With IS 4432 20Ni7Cr2Mo2-S?
EN 10084 18CrNiMo7-6 and IS 4432 20Ni7Cr2Mo2-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 18CrNiMo7-6
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IS 4432 20Ni7Cr2Mo2-S
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Frequently Asked Questions
What is the difference between EN 10084 18CrNiMo7-6 and IS 4432 20Ni7Cr2Mo2-S?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can EN 10084 18CrNiMo7-6 be substituted with IS 4432 20Ni7Cr2Mo2-S?
EN 10084 18CrNiMo7-6 and IS 4432 20Ni7Cr2Mo2-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.