JIS G4105:1979 SCM420 Steel: Specifications & Listings

JIS G4105:1979 SCM420: Japanese case hardening chrome molybdenum steel

Forms: Round Bar Category: Alloy Steel
Grade Details
GradeJIS G4105:1979 SCM420
Standard JIS G4105:1979
ApplicationsCase hardened gears, cams, pins, shafts
Most Active InWest (Maharashtra)
Equivalent / Similar Grades
Grade Standard Region Live on M-EX
EN 10084 20MnCr5 EN 10084:2008 Europe 11 listings, 11 RFQs →
EN 10084 16MnCr5 EN 10084:2008 Europe 11 listings, 6 RFQs →
AISI 5120 AISI USA 0 listings, 2 RFQs →
BS 970 EN36 BS 970:1955 UK 9 listings, 5 RFQs →
GB/T 3077 20CrMnTi GB/T 3077:2015 China 2 listings, 0 RFQs →
BS 970 (Part 1) 708H20 BS 970 (Part 1):1991 UK No activity yet
BS 970 (Part 1) 708M20 BS 970 (Part 1):1983 UK No activity yet
Market Snapshot
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7D Offer Price
● 0.0%
15D Offer Price
● 0.0%
30D Offer Price
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Supply & Demand by FormSee Full Supply & Demand →
Round Bar →
Deep Supply
Grade ComparisonCompare With a Specific Grade →
Grade Standard Match
BS 970 (Part 1) 708H20 BS 970 (Part 1):1991 Strong Match
BS 970 (Part 1) 708M20 BS 970 (Part 1):1983 Strong Match
BS 970 (Part 1) 708H20 BS 970 (Part 1):1983 Strong Match
KS D3867 SCM415 KS D 3867:2025 Close Alternative
IS 1570 (Part 4) 30Cr4Mo2 IS 1570 (Part 4):1988 Close Alternative
SAE J404 4135 SAE J404:2009 Close Alternative
SAE J404 4135 SAE J404:2000 Close Alternative
SAE J404 4118 SAE J404:2009 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 Cr Mo
0.18–0.23 0.15–0.35 0.60–0.90 0.90–1.20 0.15–0.30
Mechanical Properties
Tensile Strength ≥830 MPa
Case Hardness HRC 58–62
Core Hardness HB 235–293
Typical Available Sizes
Round Bar 16mm–200mm dia
Flat Bar 20×8mm–150×40mm
Sizes are indicative. Contact seller for exact availability.

Popular forms for this grade:

Round Bar (3)

Active JIS G4105:1979 SCM420 Listings on M-EX (For Sale)

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JIS G4105:1979 SCM420 Round Bar
6.700 MT
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JIS G4105:1979 SCM420 Round Bar
2.900 MT
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JIS G4105:1979 SCM420 Round Bar
2.900 MT
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