ASTM B381
This specification2 covers 39 grades of annealed titanium and titanium alloy forgings as follows:
Grade
| Grade |
Description |
| F-1 |
- |
| F-2 |
- |
| F-2HB,C |
- |
| F-3 |
- |
| F-4 |
- |
| F-5 |
- |
| F-6 |
- |
| F-7 |
- |
| F-7HB,C |
- |
| F-9 |
- |
| F-9D |
- |
| F-11 |
- |
| F-12 |
- |
| F-13 |
- |
| F-14 |
- |
| F-15 |
- |
| F-16 |
- |
| F-16HB,C |
- |
| F-17 |
- |
| F-18 |
- |
| F-18D |
- |
| F-19E |
- |
| F-19F |
- |
| F-19G |
- |
| F-20E |
- |
| F-20F |
- |
| F-20G |
- |
| F-21E |
- |
| F-21F |
- |
| F-21G |
- |
| F-23 |
- |
| F-23D |
- |
| F-24 |
- |
| F-25 |
- |
| F-26 |
- |
| F-26HB,C |
- |
| F-27 |
- |
| F-28 |
- |
| F-28D |
- |
| F-29 |
- |
| F-29D |
- |
| F-30 |
- |
| F-31 |
- |
| F-32 |
- |
| F-33 |
- |
| F-34 |
- |
| F-35 |
- |
| F-36 |
- |
| F-37 |
- |
| F-38 |
- |
Note:
A These properties apply to forgings having a cross section no greater than 3 in.2(1935 mm2). Mechanical properties of forgings having greater cross sections shall be negotiated between the manufacturer and the purchaser.
B Material is identical to the corresponding numeric grade (that is, Grade F-2H = Grade F-2) except for the higher guaranteed minimum UTS, and may be dual certified with its corresponding numeric grade. Grade F-2H, F-7H, F-16H, and F-26H are intended primarily for pressure vessel use.
C 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.
D Properties for material in transformed-beta condition.
E Properties for material in the solution treated condition.
F Properties for solution treated and aged condition-Moderate strength (determined by aging temperature).
G Properties for solution treated and aged condition-High Strength (determined by aging temperature).
H For product section or wall thickness values < 1.0 in.
I For product section or wall thickness values ≤ 1.0 in.
† Tensile strength for Grade F-3 and F-4 was corrected editorially.