GR5 Medical Titanium Alloy Sheet Titanium Plate ASTM F1472 (UNS R56400)
ASTM F1472 standard,Manufacturing requirements:
Finish—The mill product may be furnished to the purchaser as mechanically descaled or pickled, sandblasted, chemically milled, ground, machined, peeled, polished, combinations of these operations, or as specified by the purchaser. On billets, bars, plates, and forgings, it is permissible to remove minor surface imperfections by grinding if the resultant area meets the dimensional and surface finish requirements of this specification. Condition—Material shall be furnished in the annealed or cold-worked condition.
This standard have special requirements of microstructure:
1. The microstructure shall be a fine dispersion of the alpha and beta phases resulting from processing in the alpha plus beta field. There shall be no continuous alpha network at prior beta grain boundaries. There shall be no coarse, elongated alpha platelets.
2. Determine the beta transus temperature for each heat by a suitable method and report on the material certification if required by the purchaser.
3. Alpha case is not permitted for products supplied with a machined, ground, or chemically milled surface finish. For other products, there will be no continuous layer of alpha case when examined at 100* magnification.
Chemical Composition
Element | Composition % |
Nitrogen, max | 0.05 |
Carbon, max | 0.08 |
Hydrogen, max | 0.015 |
Iron, max | 0.30 |
Oxygen, max | 0.20 |
Aluminum | 5.5~6.75 |
Vanadium | 3.5~4.5 |
Yttrium | 0.005 |
Titamium | balance |
Mechanical Properties
Size | Tensile strength/ Mpa | Yield strength/ Mpa |
bars, forgings | ||
up to 50mm | 930 | 860 |
over 50mm to 150mm | 895 | 825 |
sheet, strip and plate | ||
up to 4.8mm | 924 | 869 |
4.8-101.6mm | 895 | 825 |
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