National standards: GB/T2965-2007, GB/T13810, Q/BS5331-91

American standards: ASTM B348, ASTM F136, ASTM F67, AMS4928

1、 Referenced standards

1: GB 228 Metal Tensile Testing Methods

2: GB/T 3620.1 Titanium and Titanium Alloy Grades and Chemical Composition

3: GB/T3620.2 Chemical Composition and Permissible Variations of Titanium and Titanium Alloy Processed Products

4: GB 4698 Chemical Analysis Methods for Sponge Titanium, Titanium and Titanium Alloys

2、 Technical requirements

1: The chemical composition of titanium and titanium alloy bars should comply with the provisions of GB/T 3620.1. When repeated testing is required, the allowable deviation of chemical composition should comply with the provisions of GB/T 3620.2.

2: The diameter or side length of Hot working bar and its allowable deviation shall comply with the provisions in Table I.

3: After Hot working, after turning (grinding) and cold rolling, the allowable diameter deviation of cold drawn bars shall comply with the provisions in Table II.

4: The out of roundness of bar after turning (grinding) after Hot working shall not be more than half of its dimensional tolerance.

5: The indefinite length of the processed bar is 300-6000mm, and the indefinite length of the annealed bar is 300-2000mm. The definite length or double length should be within the indefinite length range. The allowable deviation of the definite length is+20mm; The double length should also be included in the cutting amount of the bar, with each cutting amount being 5mm. The fixed length or double length should be specified in the contract.