1.1 This specification covers the requirements for 33 grades of titanium and titanium alloy welded pipe intended for general corrosion resisting and elevated temperature service as follows:
1.1.1 Grade 1—UNS R50250. Unalloyed titanium, low oxygen,
1.1.2 Grade 2—UNS R50400. Unalloyed titanium, standard oxygen,
1.1.2.1 Grade 2H—UNS R50400. Unalloyed titanium (Grade 2 with 58 ksi (400 MPa) minimum UTS),
1.1.3 Grade 3—UNS R50550. Unalloyed titanium, medium oxygen,
1.1.4 Grade 5—UNS R56400. Titanium alloy (6 % aluminum, 4 % vanadium),
1.1.5 Grade 7—UNS R52400. Unalloyed titanium plus 0.12 to 0.25 % palladium, standard oxygen,
1.1.5.1 Grade 7H—UNS R52400. Unalloyed titanium plus 0.12 to 0.25 % palladium (Grade 7 with 58 ksi (400 MPa) minimum UTS),
1.1.6 Grade 9—UNS R56320. Titanium alloy (3 % aluminum, 2.5 % vanadium),
1.1.7 Grade 11—UNS R52250. Unalloyed titanium plus 0.12 to 0.25 % palladium, low oxygen,
1.1.8 Grade 12—UNS R53400. Titanium alloy (0.3 % molybdenum, 0.8 % nickel),
1.1.9 Grade 13—UNS R53413. Titanium alloy (0.5 % nickel, 0.05 % ruthenium), low oxygen,
1.1.10 Grade 14—UNS R53414. Titanium alloy (0.5 % nickel, 0.05 % ruthenium), standard oxygen,
1.1.11 Grade 15—UNS R53415. Titanium alloy (0.5 % nickel, 0.05 % ruthenium), medium oxygen,
1.1.12 Grade 16—UNS R52402. Unalloyed titanium plus 0.04 to 0.08 % palladium, standard oxygen,
1.1.12.1 Grade 16H—UNS R52402. Unalloyed titanium plus 0.04 to 0.08 % palladium (Grade 16 with 58 ksi (400 MPa) minimum UTS),
1.1.13 Grade 17—UNS R52252. Unalloyed titanium plus 0.04 to 0.08 % palladium, low oxygen,
1.1.14 Grade 18—UNS R56322. Titanium alloy (3 % aluminum, 2.5 % vanadium plus 0.04 to 0.08 % palladium),
1.1.15 Grade 19—UNS R58640. Titanium alloy (3 % aluminum, 8 % vanadium, 6 % chromium, 4 % zirconium, 4 % molybdenum),
1.1.16 Grade 20—UNS R58645. Titanium alloy (3 % aluminum, 8 % vanadium, 6 % chromium, 4 % zirconium, 4 % molybdenum) plus 0.04 to 0.08 % palladium,
1.1.17 Grade 21—UNS R58210. Titanium alloy (15 % molybdenum, 3 % aluminum, 2.7 % niobium, 0.25 % silicon),
1.1.18 Grade 23—UNS R56407. Titanium alloy (6 % aluminum, 4 % vanadium, extra low interstitial, ELI),
1.1.19 Grade 24—UNS R56405. Titanium alloy (6 % aluminum, 4 % vanadium) plus 0.04 to 0.08 % palladium,
1.1.20 Grade 25—UNS R56403. Titanium alloy (6 % aluminum, 4 % vanadium) plus 0.3 to 0.8 % nickel and 0.04 to 0.08 % palladium,
1.1.21 Grade 26—UNS R52404. Unalloyed titanium plus 0.08 to 0.14 % ruthenium,
1.1.21.1 Grade 26H—UNS R52404. Unalloyed titanium plus 0.08 to 0.14 % ruthenium (Grade 26 with 58 ksi (400 MPa) minimum UTS),
1.1.22 Grade 27—UNS R52254. Unalloyed titanium plus 0.08 to 0.14 % ruthenium,
1.1.23 Grade 28—UNS R56323. Titanium alloy (3 % aluminum, 2.5 % vanadium) plus 0.08 to 0.14 % ruthenium,
1.1.24 Grade 29—UNS R56404. Titanium alloy (6 % aluminum, 4 % vanadium with extra low interstitial elements (ELI)) plus 0.08 to 0.14 % ruthenium,
1.1.25 Grade 33—UNS R53442. Titanium alloy (0.4 % nickel, 0.015 % palladium, 0.025 % ruthenium, 0.15 % chromium),
1.1.26 Grade 34—UNS R53445. Titanium alloy (0.4 % nickel, 0.015 % palladium, 0.025 % ruthenium, 0.15 % chromium),
1.1.27 Grade 35—UNS R56340. Titanium alloy (4.5 % aluminum, 2 % molybdenum, 1.6 % vanadium, 0.5 % iron, 0.3 % silicon),
1.1.28 Grade 37—UNS R52815. Titanium alloy (1.5 % aluminum),
1.1.29 Grade 38—UNS R54250. Titanium alloy (4 % aluminum, 2.5 % vanadium, 1.5 % iron), and
1.1.30 Grade 39—UNS R53390. Titanium alloy (0.25 % iron, 0.4 % silicon).