AISI 4340 Alloy Steel

steel-4340

AISI 4340 Alloy Steel

carbon-steel

AISI 4340

{
  "density": {
    "value": 7850,
    "unit": "kg/m³"
  },
  "tensileStrengthYield": {
    "value": 862,
    "unit": "MPa"
  },
  "tensileStrengthUltimate": {
    "value": 1110,
    "unit": "MPa"
  },
  "elasticModulus": {
    "value": 205,
    "unit": "GPa"
  },
  "shearModulus": {
    "value": 80,
    "unit": "GPa"
  },
  "poissonsRatio": 0.29,
  "thermalConductivity": {
    "value": 44.5,
    "unit": "W/(m·K)"
  },
  "thermalExpansion": {
    "value": 12.3,
    "unit": "µm/(m·K)"
  },
  "specificHeat": {
    "value": 475,
    "unit": "J/(kg·K)"
  },
  "meltingPoint": {
    "value": 1427,
    "unit": "°C"
  },
  "hardness": {
    "brinell": 321,
    "rockwellC": "C35"
  }
}

Aircraft landing gear, Power transmission gears, Shafts

Ni-Cr-Mo alloy. Very high strength. Excellent toughness and fatigue resistance.