... steel round bar 17-4PH (630 stainless )- You choose !!1. Diameter: Ø1'', Ø2'', Ø2.5'', Ø3'', Ø3.5'', Ø4'', Ø4.5'', Ø4.5'', Ø5'',Ø6 ... 300°C), and corrosion resistance.Mechanical properties can be optimized with heat treatment. Very high yield strength up to 1100-1300 ... temperatures. It has adequate resistance to atmospheric corrosion or in diluted acids or salts where its corrosion resistance is ...