Description of alloyed steel wire AISI 4340
AISI 4340 is an alloyed steel incorporating nickel, chromium and molybdenum. It exhibits an appropriate response to oil heat treatment, thereby achieving a combination of ductility and tensile strength. This material is employed in civil and military aviation, in the automotive sector and in forged hydraulic as well as other machine tools.

Specifications of AISI 4340 Alloyed Steel Wire
Element
|
Content (%)
|
Iron, Fe
|
95.195 - 96.33
|
Nickel, Ni
|
1.65 - 2.00
|
Chromium, Cr
|
0.700 - 0.900
|
Manganese, Mn
|
0.600 - 0.800
|
Carbon, C
|
0.370 - 0.430
|
Molybdenum, Mo
|
0.200 - 0.300
|
Silicon, Si
|
0.150 - 0.300
|
Sulphur, S
|
0.0400
|
Phosphorus, P
|
0.0350
|
Brinell Hardness
|
293 HB
|
Tensile Strength
|
1014 MPa
|
Elongation at Break
|
19 %
|
Reduction in Area
|
60.40 %
|
Elastic Modulus
|
200 GPa
|
Elastic Modulus
|
159 GPa
|
Poisson's Ratio
|
29 %
|
Machinability
|
50 %
|
Shear Modulus
|
78 GPa
|
Density
|
7,85 g/cm3
|
Melting Point
|
1427 °C
|
Specifications: ASTM A 829 / A6 SAE J404, AMS 2252/ 2301/6359 SAE J404
Applications of AISI 4340 Alloyed Steel Wire
- Aircraft Landing Gear Components:
- The material is used in the fabrication of landing gear components, including struts and connecting rods, given its tensile strength as validated by standard tests.
- Vehicle Transmission Components:
- It is employed in automotive systems for the manufacture of transmission components such as gears and shafts, thereby meeting specified performance requirements.
- Forged Hydraulic Devices:
- The material is utilised for forging hydraulic components. Its tensile strength and impact resistance are measured to ensure functionality under pressure.
- Crankshafts produced from high-strength forged steel:
- It is applied in the production of engine crankshafts, where measured strength and fatigue resistance are essential for sustained performance.
- Gears and Shafts for power transmission:
- They are used in manufacturing gears and shafts for power transmission systems. Specific wear resistance and toughness have been quantified for use in demanding industrial applications.
Packaging:
Our alloy steel AISI 4340 is handled under controlled conditions during storage and transport to maintain the product in its original condition.