SUM 22 provide good surface finish and brazing properties. These steels are difficult to weld and are not recommended for case hardening.

They are generally used where mechanical properties can be sacrificed for machinability.

Chemical composition

Element

Weight %

Mn

0.70-1.00

C

≤0.13

S

0.24-0.33

P

0.07-0.12

Si

0.10-0.12

 

Mechanical Properties

Tensile Strength σb (MPa)

Hot Rolled ≥540

Cold Drawn≥755

 

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