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SAE J404 4120 / SAE 4120 Steel - Specifications & Listings

SAE J404 4120: AISI 4120 is a chromium-molybdenum alloy steel offering good strength and wear resistance. It is commonly carburized or heat treated for improved surface hardness.

Forms: Round Bar Category: Alloy Steel
Grade Details
GradeSAE J404 4120 / SAE 4120
StandardSAE J404
DescriptionAISI 4120 is a chromium-molybdenum alloy steel offering good strength and wear resistance. It is commonly carburized or heat treated for improved surface hardness.
ApplicationsUsed for gears, crankshafts, studs, pins, machinery parts, and transmission components.
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Chemical Composition (%)
C Mn Si Cr Mo P S
0.18-0.23 0.90-1.20 0.15-0.35 0.40-0.60 0.13-0.20 0.035 max 0.040 max
Mechanical Properties
tensile_strength 700-900 MPa
yield_strength 500-700 MPa
elongation 14-20%
hardness 180-240 HB
Processing:

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SAE J404 4120 / SAE 4120 Round Bar
3.500 MT
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SAE J404 4120 / SAE 4120 Round Bar
5.300 MT
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