AISI 1008 Steel, cold drawn bar, 19-32 mm (0.75-1.25 in) round
Tensile Strength, Ultimate 340 MPa 49300 psi
Tensile Strength, Yield 285 MPa 41300 psi
AISI 4130 Steel, normalized at 870°C (1600°F), air cooled, 50 mm (2 in.) round
Tensile Strength, Ultimate 615 MPa 89200 psi
Tensile Strength, Yield 415 MPa 60200 psi
Info from www.matweb.com