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SAE 4140 Steel — Specifications & Listings

SAEChrome molybdenum alloy steel, high strength and toughness

Forms: Round Bar Square Bar Flat Bar Hex Bar Forging Category: Alloy Steel
Grade Details
GradeSAE 4140
StandardSAE
DescriptionChrome molybdenum alloy steel, high strength and toughness
ApplicationsGears, shafts, dies, bolts, crankshafts
Equivalent / Similar Grades
Grade Standard Region
42CrMo4 DIN/EN Europe
EN19 BS970 UK
SCM440 JIS Japan
42CD4 AFNOR France
Chemical Composition (%)
C Mn Cr Mo Si
0.38–0.43 0.75–1.00 0.80–1.10 0.15–0.25 0.15–0.35
Mechanical Properties
Tensile Strength 850–1000 MPa
Yield Strength ≥680 MPa
Elongation ≥13%
Hardness 248–302 HB
Typical Available Sizes
Round Bar 16mm–350mm dia
Flat Bar 20×8mm–250×75mm
Hex Bar 19mm–100mm A/F
Sizes are indicative. Contact seller for exact availability.

Active SAE 4140 Listings on M-EX

SAE 4140 Round Bar
7.600 MT
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SAE 4140 Hex Bar
0.500 MT
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SAE 4140 Hex Bar
3.300 MT
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SAE 4140 Flat Bar
1.500 MT
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SAE 4140 Flat Bar
2.000 MT
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SAE 4140 Round Bar
0.900 MT
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SAE 4140 Hex Bar
0.700 MT
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SAE 4140 Flat Bar
1.600 MT
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SAE 4140 Flat Bar
1.400 MT
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SAE 4140 Hex Bar
1.500 MT
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