Executive standard of titanium rod

National standards: GB / t2965-2007, GB / t13810, Q / bs5331-91

American Standard: ASTM b348, ASTM F136, ASTM F67, ams4928

1、 Reference standard

1: GB 228 metal tensile test method

2: Grade and chemical composition of titanium and titanium alloys (GB / T 3620.1)

3: GB / t3620.2 chemical composition and allowable deviation of titanium and titanium alloy products

4: GB 4698 method for chemical analysis of sponge titanium, titanium and titanium alloys

2、 Technical requirements

1: The chemical composition of titanium and titanium alloy bars shall comply with GB / T 3620.1, and the allowable deviation of chemical composition shall comply with GB / T 3620.2 when repeated inspection is required.

2: The diameter or side length of hot working bar and its allowable deviation shall comply with the provisions in Table 1.

3: After hot working, the allowable diameter deviation of the bar after turning (grinding), cold rolling and cold drawing shall meet the requirements of Table 2.

4: After hot working, the out of roundness of the polished bar should not be more than half of its dimensional tolerance.

5: The unfixed length of bar in processing state is 300-6000 mm, and that in annealing state is 300-2000 mm. The unfixed length or multiple length should be within the range of unfixed length. The allowable deviation of fixed length is + 20 mm. The multiple length should also be included in the cut size of bar, and each hole size is 5 mm. The fixed length or multiple length should be indicated in the contract.