Increase the corrosion resistance properties;

Increase the surface hardness of bore up to HB400;

Increase surface finish of bore to Ra≤3.2μm

Test and inspection carried out on each bar during production:

Chemical Composition;

Tensile Test;

Impact Test;

Hardness Test;

Metallographic Test (Grain Size);

Corrosion Test (According to  ASTM A262 Practice E);

Ultrasonic Test over the whole length of the bar (according to ASTM A388);

Relative magnetic permeability test;

Hot Spot Test;

Dimension Inspection, etc.