JIS G4103:1979 SNCM439 Steel: Specifications & Listings

JIS G4103:1979 SNCM439: Japanese Ni-Cr-Mo high strength alloy steel

Forms: Round Bar Category: Alloy Steel
Grade Details
GradeJIS G4103:1979 SNCM439
Standard JIS G4103:1979
ApplicationsCrankshafts, gears, heavy duty shafts, aircraft components
Most Active InWest (Maharashtra, Gujarat)
Equivalent / Similar Grades
Grade Standard Region Live on M-EX
EN 10083-3 34CrNiMo6 EN 10083-3:2006 Europe 3 listings, 0 RFQs →
BS 970 EN24 BS 970:1955 UK 14 listings, 22 RFQs →
SAE J404 4340 SAE J404:2009 USA 17 listings, 15 RFQs →
IS 4367 40Ni6Cr4Mo3 IS 4367:1991 India 0 listings, 2 RFQs →
GOST 4543 40XH GOST 4543-2016 Russia 2 listings, 0 RFQs →
GB/T 3077 42CrMo GB/T 3077:2015 China 2 listings, 0 RFQs →
SAE J404 4340 SAE J404:2000 USA No activity yet
Market Snapshot
See Full Price Gap →
7D Offer Price
● 0.0%
15D Offer Price
● 0.0%
30D Offer Price
▼ -0.3%
Supply & Demand by FormSee Full Supply & Demand →
Round Bar →
Deep Supply
Grade ComparisonCompare With a Specific Grade →
Grade Standard Match
SAE J404 4340 SAE J404:2009 Strong Match
SAE J404 4340 SAE J404:2000 Strong Match
SAE J404 E4340 SAE J404:2009 Close Alternative
SAE J404 E4340 SAE J404:2000 Close Alternative
JIS G4053 SNCM240 JIS G4053:2008 Close Alternative
GB/T 3077 40CrNiMo GB/T 3077:2015 Close Alternative
SAE J404 8637 SAE J404:2009 Close Alternative
SAE J404 8640 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 Ni
0.36–0.43 0.15–0.35 0.60–0.90 0.60–1.00 0.15–0.30 1.60–2.00
Mechanical Properties
Tensile Strength ≥980 MPa
Yield Strength ≥835 MPa
Elongation ≥12%
Hardness 293–352 HB
Typical Available Sizes
Round Bar 20mm–350mm dia
Flat Bar 25×10mm–250×75mm
Sizes are indicative. Contact seller for exact availability.

Popular forms for this grade:

Round Bar (3)

Active JIS G4103:1979 SNCM439 Listings on M-EX (For Sale)

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JIS G4103:1979 SNCM439 Round Bar
2.000 MT
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JIS G4103:1979 SNCM439 Round Bar
1.600 MT
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JIS G4103:1979 SNCM439 Round Bar
4.600 MT
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