... .5'', Ø3'', Ø3.5'', Ø4'', Ø4.5'', Ø4.5'', Ø5'',Ø6'', Ø7'', Ø8''2. Length: 3m, 4m, 5m, 6m, 7m...as ... 17-4 PH is a precipitation hardening martensitic stainless steel with Cu and Nb/Cb additions. The grade combines high strength ... / 300°C), and corrosion resistance.Mechanical properties can be optimized with heat treatment. Very high yield strength up to 1100-1300 ...