AISI 1074/1075 Carbon Steel Springs

AISI 1074/1075 are tempered spring steels that look and act much like blue tempered steels. The difference being that scaleless tempered is of medium-high carbon, have been tempered and have better forming qualities.

Technical Specification AISI 1074/1075
Nominal Composition

C: 0.70 - 0.80

Mn: 0.50 - 0.80


0.29 lb./in3

Modulus of Elasticity (E)

29.7x 103 ksi

Modulus of Rigidity (G)

11.6 x 103 ksi

Electrical Resistivity

176 µΩ.cm

Thermal Conductivity  
Min Size

0.003 in (0.080 mm)

Max Temp

120oC (250oF)


It is used widely used for flat spring