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:

1.1.1 Grade 1—Unalloyed titanium,

1.1.2 Grade 2—Unalloyed titanium,

1.1.3 Grade 3—Unalloyed titanium,

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),

1.1.6 Grade 11—Unalloyed titanium plus 0.12 to 0.25 % palladium,

1.1.7 Grade 12—Titanium alloy (0.3 % molybdenum, 0.8 % nickel),

1.1.8 Grade 13—Titanium alloy (0.5 % nickel, 0.05 % ruthenium),

1.1.9 Grade 14—Titanium alloy (0.5 % nickel, 0.05 % ruthenium),

1.1.10 Grade 15—Titanium alloy (0.5 % nickel, 0.05 % ruthenium),

1.1.11 Grade 16—Unalloyed titanium plus 0.04 to 0.08 % palladium,

1.1.12 Grade 17—Unalloyed titanium plus 0.04 to 0.08 % palladium,

1.1.13 Grade 18—Titanium alloy (3 % aluminum, 2.5 % vanadium) plus 0.04 to 0.08 % palladium,

1.1.14 Grade 26—Unalloyed titanium plus 0.08 to 0.14 % ruthenium,

1.1.15 Grade 27—Unalloyed titanium plus 0.08 to 0.14 % ruthenium,

1.1.16 Grade 28—Titanium alloy (3 % aluminum, 2.5 % vanadium) plus 0.08 to 0.14 % ruthenium,

1.1.17 Grade 30—Titanium alloy (0.3 % cobalt, 0.05 % palladium),

1.1.18 Grade 31—Titanium alloy (0.3 % cobalt, 0.05 % palladium),

1.1.19 Grade 33—Titanium alloy (0.4% nickel, 0.015% palladium, 0.025% ruthenium, 0.15% chromium), and

1.1.20 Grade 34—Titanium alloy (0.4% nickel, 0.015% palladium, 0.025% ruthenium, 0.15% chromium).

1.1.21 Grade 35—Titanium alloy (4.5 % aluminum, 2 % molybedenum, 1.6% vanadium, 0.5% iron, 0.3 % silicon).

1.2 Tubing covered by this specification shall be heat treated by at least a stress relief as defined in 5.3.

1.3 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only.