1.1This specification covers the requirements for 28 grades of titanium and titanium alloy tubing intended for surface condensers, evaporators, and heat exchangers, as follows:
1.1.1Grade 1—Unalloyed titanium,
1.1.2Grade 2—Unalloyed titanium,
1.1.2.1Grade 2H—Unalloyed titanium (Grade 2 with 58 ksi minimum UTS),
1.1.3Grade 3—Unalloyed titanium,
1.1.4Grade 7—Unalloyed titanium plus 0.12 to 0.25 % palladium,
1.1.4.1Grade 7H—Unalloyed titanium plus 0.12 to 0.25 % palladium (Grade 7 with 58 ksi minimum UTS),
1.1.5Grade 9—Titanium alloy (3 % aluminum, 2.5 % vanadium),
1.1.6Grade 11—Unalloyed titanium plus 0.12 to 0.25 % palladium,
1.1.7Grade 12—Titanium alloy (0.3 % molybdenum, 0.8 % nickel),
1.1.8Grade 13—Titanium alloy (0.5 % nickel, 0.05 % ruthenium),
1.1.9Grade 14—Titanium alloy (0.5 % nickel, 0.05 % ruthenium),
1.1.10Grade 15—Titanium alloy (0.5 % nickel, 0.05 % ruthenium),
1.1.11Grade 16—Unalloyed titanium plus 0.04 to 0.08 % palladium,
1.1.11.1Grade 16H—Unalloyed titanium plus 0.04 to 0.08 % palladium (Grade 16 with 58 ksi minimum UTS),
1.1.12Grade 17—Unalloyed titanium plus 0.04 to 0.08 % palladium,
1.1.13Grade 18—Titanium alloy (3 % aluminum, 2.5 % vanadium) plus 0.04 to 0.08 % palladium,
1.1.14Grade 26—Unalloyed titanium plus 0.08 to 0.14 % ruthenium,
1.1.14.1Grade 26H—Unalloyed titanium plus 0.08 to 0.14 % ruthenium (Grade 26 with 58 ksi minimum UTS),
1.1.15Grade 27—Unalloyed titanium plus 0.08 to 0.14 % ruthenium,
1.1.16Grade 28—Titanium alloy (3 % aluminum, 2.5 % vanadium) plus 0.08 to 0.14 % ruthenium,
1.1.17Grade 30—Titanium alloy (0.3 % cobalt, 0.05 % palladium),
1.1.18Grade 31—Titanium alloy (0.3 % cobalt, 0.05 % palladium),
1.1.19Grade 33—Titanium alloy (0.4 % nickel, 0.015 % palladium, 0.025 % ruthenium, 0.15 % chromium),
1.1.20Grade 34—Titanium alloy (0.4 % nickel, 0.015 % palladium, 0.025 % ruthenium, 0.15 % chromium),
1.1.21Grade 35—Titanium alloy (4.5 % aluminum, 2 % molybdenum, 1.6 % vanadium, 0.5 % iron, 0.3 % silicon),
1.1.22Grade 36—Titanium alloy (45 % niobium),
1.1.23Grade 37—Titanium alloy (1.5 % aluminum),
1.1.24Grade 38—Titanium alloy (4 % aluminum, 2.5 % vanadium, 1.5 % iron), and
1.1.25Grade 39—Titanium alloy (0.25 % iron, 0.4 % silicon).
Note 1—
H grade material is identical to the corresponding numeric grade (that is, Grade 2H = Grade 2) except for the higher guaranteed minimum UTS, and may always be certified as meeting the requirements of its corresponding numeric grade. Grades 2H, 7H, 16H, and 26H are intended primarily for pressure vessel use. The H grades were added in response to a user association request based on its study of over 5200 commercial Grade 2, 7, 16, and 26 test reports, where over 99 % met the 58 ksi minimum UTS. 
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