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SAE J404 4320 / SAE 4320 Steel - Specifications & Listings

SAE J404 4320: AISI 4320 is a nickel-chromium-molybdenum alloy steel with excellent toughness and fatigue resistance. It is widely used for carburized high-strength components.

Forms: Round Bar Category: Alloy Steel
Grade Details
GradeSAE J404 4320 / SAE 4320
StandardSAE J404
DescriptionAISI 4320 is a nickel-chromium-molybdenum alloy steel with excellent toughness and fatigue resistance. It is widely used for carburized high-strength components.
ApplicationsUsed for gears, shafts, aircraft components, pinions, axles, and transmission parts.
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Round Bar →
Balanced
Chemical Composition (%)
C Mn Si Ni Cr Mo P S
0.17-0.22 0.45-0.65 0.15-0.35 1.65-2.00 0.40-0.60 0.20-0.30 0.035 max 0.040 max
Mechanical Properties
tensile_strength 850-1050 MPa
yield_strength 650-850 MPa
elongation 12-18%
hardness 220-300 HB

Active SAE J404 4320 / SAE 4320 Listings on M-EX (For Sale)

SAE J404 4320 / SAE 4320 Round Bar
2.700 MT
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SAE J404 4320 / SAE 4320 Round Bar
2.300 MT
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