وان بدون درز تیتانیوم سفارشی ASTM B338 Gr12 چین
1.1 This specification covers the requirements for 20 grades of titanium and titanium alloy tubing intended for surface condensers, evaporators, and heat exchangers, as follows: 1.1.4 Grade 7 —Unalloyed titanium plus 0.12 to 0.25 % palladium, 1.1.5 Grade 9 —Titanium alloy (3 % aluminum, 2.5 % vanadium),