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JIS G4103 SNCM420 vs IS 1570 (Part 4) 20Ni7Cr2Mo2

Close Alternative — 84.7% match based on chemical composition and mechanical property overlap.

JIS G4103 SNCM420 (JIS G4103:1979) and IS 1570 (Part 4) 20Ni7Cr2Mo2 (IS 1570 (Part 4):1988) are both steel grades. Both fall under the Alloy Steel category. JIS G4103 SNCM420 is defined under Japanese Industrial Standards (JIS), originating from Japan, while IS 1570 (Part 4) 20Ni7Cr2Mo2 is defined under Bureau of Indian Standards (IS), originating from India.

As per chemical composition, JIS G4103 SNCM420 vs IS 1570 (Part 4) 20Ni7Cr2Mo2 is a 84.7% match. Mechanical property data is not available for both grades, so this factor could not be scored. Combined, this makes them a close alternative overall at 84.7%.

Frequently Compared With JIS G4103 SNCM420:
UNI 11234 100Cr6 GOST 4543 12HN3A NF A35-565 100C6 GB/T 3077 12Cr2Ni4A IS 1570 (Part 4) 07Cr4Mo6 IS 1570 (Part 4) 103Cr6 IS 4367 07Cr4Mo6 IS 1570 (Part 4) 10Cr20Mo6 IS 4367 10Cr9Mo10 IS 1570 (Part 4) 103Cr4 IS 1570 (Part 4) 105Cr5 IS 1570 (Part 7) 10Cr36Mo10H
Match Breakdown
CHEMISTRY MATCH
84.7%
MECHANICAL MATCH
No shared data
OVERALL
84.7%
Specifications
Property JIS G4103 SNCM420 IS 1570 (Part 4) 20Ni7Cr2Mo2
Standard JIS G4103:1979 IS 1570 (Part 4):1988
Category Alloy Steel Alloy Steel
C (%) 0.17-0.23 0.17-0.22
Si (%) 0.15-0.35 0.15-0.35
Mn (%) 0.40-0.70 0.45-0.65
P (%) 0.030 max Not specified
S (%) 0.030 max Not specified
Ni (%) 1.50-2.00 1.65-2.00
Cr (%) 0.40-0.80 0.40-0.60
Mo (%) 0.15-0.30 0.20-0.30
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property JIS G4103 SNCM420 IS 1570 (Part 4) 20Ni7Cr2Mo2
Tensile Strength 780-930 MPa Not specified
Yield Strength 590 MPa min Not specified
Elongation 14% min Not specified
Hardness 217-269 HB Not specified
Typical Applications
JIS G4103 SNCM420
Used in automotive gears, transmission parts, shafts, pinions, camshafts, and industrial equipment.
IS 1570 (Part 4) 20Ni7Cr2Mo2
Not documented
Key Differences
Can JIS G4103 SNCM420 Be Substituted With IS 1570 (Part 4) 20Ni7Cr2Mo2?
JIS G4103 SNCM420 and IS 1570 (Part 4) 20Ni7Cr2Mo2 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.
Forms & Sizes Available on M-EX
JIS G4103 SNCM420
Round Bar → (2 listings)
Diameter: 50–50 mm (1.97–1.97 in)
Length: 5900–6000 mm (232.28–236.22 in)
IS 1570 (Part 4) 20Ni7Cr2Mo2
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On M-EX Right Now
JIS G4103 SNCM420
2 active listings and RFQs →
IS 1570 (Part 4) 20Ni7Cr2Mo2
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Frequently Asked Questions
What is the difference between JIS G4103 SNCM420 and IS 1570 (Part 4) 20Ni7Cr2Mo2?
JIS G4103 SNCM420 specifies P, S which are not specified for IS 1570 (Part 4) 20Ni7Cr2Mo2.
Can JIS G4103 SNCM420 be substituted with IS 1570 (Part 4) 20Ni7Cr2Mo2?
JIS G4103 SNCM420 and IS 1570 (Part 4) 20Ni7Cr2Mo2 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.