1008 vs 1018 Steel Comparison

Bellow is a comparison chart with information about the chemical composition and the mechanical properties of both 1008 grade steel and 1018 grade steel. This information can be helpful for anyone involved in machining or is interesting in purchasing either 1008 or 1018 steel.

Chemical Composition

The chemical features of 1008 and 1018 steel are the following.

  1008 1018
Carbon, C 0.10% Max 0.18%
Manganese, Mn 0.30-0.50% 0.60-0.90%
Sulfur, S (Max) 0.050% 0.050%
Phosphorus, P (Max) 0.040% 0.040%

Mechanical Properties

The following are the mechanical properties of 1008 and 1018 steel. Both 1008 and 1018 can be produced as cold drawn or hot rolled, so we provide mechanical properties for both.

Cold Drawn

  1008 1018
Tensile Strength 49,000 psi 64,000 psi
Yield Strength 41,500 psi 54,000 psi
Elongation (2") 20% 15%
Reduction in Area 45% 40%
Brinell Hardness 95 126

Hot Rolled

  1008 1018
Tensile Strength 44,000 psi 58,000 psi
Yield Strength 24,500 psi 32,000 psi
Elongation (2") 30% 25%
Reduction in Area 55% 50%
Brinell Hardness 86 116

The relative machinability Rating percentage based on SAE1212 as 100% for 1008 in the cold drawn state is 55% and for 1018 is 70%.