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Build Time: 3-5 Business Days
Alloy steel 4340
4.7 (29 Reviews) 423 orders
Material type: Metal, High hardness, High strength
Alloy steel 4340 is a heat treatable and low alloy steel containing chromium, nickel and molybdenum. It has high toughness and strength in the heat treated condition.
Process compatibility
Material Color
Silver gray
Material advantages
Alloy steel 4340 can be heat treated to high strength levels while maintaining good toughness, wear resistance and fatigue strength levels, combined with good atmospheric corrosion resistance, and strength.
Material shortcomings
-
Recommended description
Good toughness, wear resistance and fatigue strength levels, combined with good atmospheric corrosion resistance, and strength.
Properties
Name
Tensile strength 820MPa
Yield strength 525MPa
Density 7.85 g/cc
Hardness 24-53HRC
Elongation at Break 22%
Modulus of elasticity 213GPa
Shear modulus 80GPa
Thermal expansion coefficent 11.5 - 13 10^-6 ºC
Melting point 1427°C
Common applications
• Power transmission gears and shafts
• Aircraft landing gear
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