This specification covers 39 grades of annealed titanium and titanium alloy forgings as Grade F-1, Grade F-2, Grade F-2H, Grade F-3, Grade F-4, Grade F-5, Grade F-6, Grade F-7, Grade F-7H, Grade F-9, Grade F-11, Grade F-12, Grade F-13, Grade F-14, Grade F-15, Grade F-16, Grade F-16H, Grade F-17, Grade F-18, Grade F-19 Grade F-20, Grade F-21, Grade F-23, Grade F-24, Grade F-25, Grade F-26, Grade F-26H, Grade F-27, Grade F-28, Grade F-29, Grade F-30, Grade F-31, Grade F-32, Grade F-33, Grade F-34, Grade F-35, Grade F-36, Grade F-37, and Grade F-38. The grades of titanium and titanium alloy metal covered by this specification shall conform to the requirements as to chemical composition prescribed. Forgings supplied under this specification shall conform to the requirements as to mechanical properties specified, as applicable, such as tensile strength, yield strength, and elongation. Nondestructive test requirements such as ultrasonic test, X-ray, or surface inspection shall be specified by the purchaser, if required.

1.1 This specification covers 39 grades of annealed titanium and titanium alloy forgings as follows:

1.1.1 Grade F-1—Unalloyed titanium,

1.1.2 Grade F-2—Unalloyed titanium,

1.1.2.1 Grade F-2H—Unalloyed titanium (Grade 2 with 58 ksi minimum UTS),

1.1.3 Grade F-3—Unalloyed titanium,

1.1.4 Grade F-4—Unalloyed titanium,

1.1.5 Grade F-5—Titanium alloy (6 % aluminum, 4 % vanadium),

1.1.6 Grade F-6—Titanium alloy (5 % aluminum, 2.5 % tin),

1.1.7 Grade F-7—Unalloyed titanium plus 0.12 to 0.25 % palladium,

1.1.7.1 Grade F-7H—Unalloyed titanium plus 0.12 to 0.25 % palladium (Grade 7 with 58 ksi minimum UTS),

1.1.8 Grade F-9—Titanium alloy (3 % aluminum, 2.5 % vanadium),

1.1.9 Grade F-11—Unalloyed titanium plus 0.12 to 0.25 % palladium,

1.1.10 Grade F-12—Titanium alloy (0.3 % molybdenum, 0.8 % nickel),

1.1.11 Grade F-13—Titanium alloy (0.5 % nickel, 0.05 % ruthenium),

1.1.12 Grade F-14—Titanium alloy (0.5 % nickel, 0.05 % ruthenium),

1.1.13 Grade F-15—Titanium alloy (0.5 % nickel, 0.05 % ruthenium),

1.1.14 Grade F-16—Unalloyed titanium plus 0.04 to 0.08 % palladium,

1.1.14.1 Grade F-16H—Unalloyed titanium plus 0.04 to 0.08 % palladium (Grade 16 with 58 ksi minimum UTS),

1.1.15 Grade F-17—Unalloyed titanium plus 0.04 to 0.08 % palladium,

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

1.1.17 Grade F-19—Titanium alloy (3 % aluminum, 8 % vanadium, 6 % chromium, 4 % zirconium, 4 % molybdenum),

1.1.18 Grade F-20—Titanium alloy (3 % aluminum, 8 % vanadium, 6 % chromium, 4 % zirconium, 4 % molybdenum) plus 0.04 to 0.08 % palladium,

1.1.19 Grade F-21—Titanium alloy (3 % aluminum, 2.7 % niobium, 15 % molybdenum, 0.25 % silicon),

1.1.20 Grade F-23—Titanium alloy (6 % aluminum, 4 % vanadium, extra low interstitials, ELI),

1.1.21 Grade F-24—Titanium alloy (6 % aluminum, 4 % vanadium) plus 0.04 to 0.08 % palladium,

1.1.22 Grade F-25—Titanium alloy (6 % aluminum, 4 % vanadium) plus 0.3 to 0.8 % nickel and 0.04 to 0.08 % palladium,

1.1.23 Grade F-26—Unalloyed titanium plus 0.08 to 0.14 % ruthenium,

1.1.23.1 Grade F-26H—Unalloyed titanium plus 0.08 to 0.14 % ruthenium (Grade 26 with 58 ksi minimum UTS),

1.1.24 Grade F-27—Unalloyed titanium plus 0.08 to 0.14 % ruthenium,

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

1.1.26 Grade F-29—Titanium alloy (6 % aluminum, 4 % vanadium, extra low interstitial, ELI plus 0.08 to 0.14 % ruthenium),

1.1.27 Grade F-30—Titanium alloy (0.3 % cobalt, 0.05 % palladium),

1.1.28 Grade F-31—Titanium alloy (0.3 % cobalt, 0.05 % palladium),

1.1.29 Grade F-32—Titanium alloy (5 % aluminum, 1 % vanadium, 1 % tin, 1 % zirconium, 0.8 % molybdenum),

1.1.30 Grade F-33—Titanium alloy (0.4 % nickel, 0.015 % palladium, 0.025 % ruthenium, 0.15 % chromium),

1.1.31 Grade F-34—Titanium alloy (0.4 % nickel, 0.015 % palladium, 0.025 % ruthenium, 0.15 % chromium),

1.1.32 Grade F-35—Titanium alloy (4.5 % aluminum, 2 % molybdenum, 1.6 % vanadium, 0.5 % iron, 0.3 % silicon),

1.1.33 Grade F-36—Titanium alloy (45 % niobium),

1.1.34 Grade F-37—Titanium alloy (1.5 % aluminum), and

1.1.35 Grade F-38—Titanium alloy (4 % aluminum, 2.5 % vanadium, 1.5 % iron).

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.

1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.