This industry standard applies to titanium alloy sheets of BT1-OO, BTI-0, series 0T4, BT5-1, BT6C, BT6, BT14 and BT20 grades used in the aviation industry.
1. SORTMENT .
1.3 An example of a reference designation in the job order: a sheet of grade BTI-00, 5 mm thick, 1000 mm wide and 1500 mm long.
Sheet BT1-00 - 5x1000x1500 OST 90218-76.
2. TECHNICAL REQUIREMENTS
2.1. The chemical composition of the alloys must meet the requirements of OCT1 90013-81 with the hydrogen content of the sheets are set: for alloy grades BT1-00, BT1-0, 0T4-0, 0T4-1 and 0T4 - not more than 0.010%; for alloy grade BT5-1 - not more than 0,012%; for alloy grade BT6, BT6C, BT14 and BT20 - not more than 0,015%.
2.2 Sheets are delivered after annealing and straightening or after annealing, smoothing and melting.
2.3 Sheets are delivered with etched surface, evenly cut from all sides, without coarse burrs on the cut edges.
The slash of the cut should not lead out of the limit deviations in width and length.
On the surface of the sheets, but are allowed: cracks, tears, delamination, residues of scale, foams, metal and non-metallic inclusions visible to the naked eye.
The color of the surface of the sheets, depending on the nature of the alloy and the method of production, but is a rejection feature.
2.4 Impressions of rolls in the form of dents and convexities, as well as surface defects, not stipulated by clause 2.3, to a depth not exceeding the minus thickness tolerance, are allowed on the surface of the sheets.

Supplier

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