Scope

This specification covers the chemical, mechanical, and metallurgical requirements for four grades of unalloyed titanium strip, sheet, plate, bar, billet, forging, and wire used for the manufacture of surgical implants.

Product classifcations are consistent with SpecifcationsB265,B348, and B381.

Strip Any product 0.1875 in. (4.76 mm) and under in thickness and less than 24 in.(610 mm) in width.

Sheet-Any product 0.1875 in.(4.76 mm) and under in thickness and 24 in.(610 mm) or more in width.

Plate-Any product 0.1875 in.(4.76 mm)thick and over and 10 in.(254 mm)wide and over, with widths greater than five times thickness. Plate up to 4 in.(101.60 mm), thick inclusive is covered by this specification.

 Bar Rounds, fats,or other shapes from 0.1875 in.(4.76 mm)to 4 in.(101.60 mm)in diameter or thickness.(Other sizes and shapes by special order.)

Billet A solid semi-fnished section hot rolled01forged from an ingot, with a cross sectional area greater than 16 in.(10322mm)whose width is less than5times its thickness.

Material Grade:

UNS R50700

UNS R50250

UNS R50400

UNS R50550

Chemical composition

Physical strength for Sheet, strip and Plate.

Physical strength for annealed Bar,Billet,forging

Processing

Ti Sponge,electrolyze,smelt,forge,rod bellet,extude,forge,straighten,etc.

Manufacture

1.Condition-Material shall be furnished in the hot-worked, cold-worked, forged, annealed, or stress-relieved con-dition.

2.Finish-Unalloyed titanium material shall be free of injurious external and internal imperfections of a nature that will interfere with the purpose for which it is intended.The mill product may be furnished as descaled or pickled,abrasive blasted,chemically milled,ground,machined,peeled,polished, or as specified by the purchaser.On billets, bars,plates, and forgings,it is permissible to remove minor surface imperfections by spot grinding if such grinding does not reduce the dimension below the minimum permitted by the dimen- sional tolerance ordered.

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