AISI 4340 Steel Normalized

Material Properties for AISI 4340 Steel Normalized

Physical specifications of materials.

Materials AISI 4340 Steel
  Description Normalized
Density g/cc 7.85
  lb/in^3 0.284
Hardness Brinell unless specified 363
Tensile Strength ultimate Mpa 1282
  Ksi 185.89
Yield Strength MPa 862
  Ksi 124.99
Modulus of Elasticity Gpa 205
  10^6 Psi 29.71014488
Poisson’s Ratio   0.29
%Elongation at break 12.2
%Reduction of area 36.3
Izod Impact J 16
  Ft-lb 11.8048
Fracture Toughness Mpa(m)^0.5 55
  Ksi(in)^0.5 49.5
Thermal conductivity W/m-K 44.5
  Btu/ft-h-F 25.722543349
Specific Heat Cpacity J/g-K 0.475
  Btu/lb-F 0.114
Coefficient of thermal expansion 1E-6/K 12.3
  1E-6/F 6.8436090171
Electrical Resistivity Ohm-cm 0.0000248