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JIS G4103:1979 SNCM420 Steel: Specifications & Listings

JIS G4103:1979 SNCM420: SNCM420 is a low carbon nickel chromium molybdenum alloy steel intended for carburized and hardened components. It combines surface wear resistance with a tough core.

Forms: Round Bar Category: Alloy Steel
Grade Details
GradeJIS G4103:1979 SNCM420
Standard JIS G4103:1979
ApplicationsUsed in automotive gears, transmission parts, shafts, pinions, camshafts, and industrial equipment.
Most Active InEast (West Bengal)
Equivalent / Similar Grades
Grade Standard Region Live on M-EX
SAE J404 4320 SAE J404:2009 USA 2 listings, 0 RFQs →
Supply & Demand by FormSee Full Supply & Demand →
Round Bar →
Low Activity
Grade ComparisonCompare With a Specific Grade →
Grade Standard Match
SAE J404 4320 SAE J404:2009 Strong Match
SAE J404 4320 SAE J404:2000 Strong Match
IS 1570 (Part 4) 20Ni7Cr2Mo2 IS 1570 (Part 4):1988 Close Alternative
SAE J404 8620 SAE J404:2009 Close Alternative
SAE J404 8720 SAE J404:2009 Close Alternative
SAE J404 8620 SAE J404:2000 Close Alternative
SAE J404 8720 SAE J404:2000 Close Alternative
BS 970 (Part 3) 805M20 BS 970 (Part 3):1991 Close Alternative
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Chemical Composition (%)
C Si Mn P S Ni Cr Mo
0.17-0.23 0.15-0.35 0.40-0.70 0.030 max 0.030 max 1.50-2.00 0.40-0.80 0.15-0.30
Mechanical Properties
Tensile Strength 780-930 MPa
Yield Strength 590 MPa min
Elongation 14% min
Hardness 217-269 HB

Popular forms for this grade:

Round Bar (2)

Active JIS G4103:1979 SNCM420 Listings on M-EX (For Sale)

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JIS G4103:1979 SNCM420 Round Bar
2.700 MT
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JIS G4103:1979 SNCM420 Round Bar
4.300 MT
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