implementation standard for titanium bars
national standards: gb/t 2965-2007, gb/t 13810, q/bs5331-91
american standards: astm b348, astm f136, astm f67, ams4928
1. reference criteria
(1) tension test method of gb 228 metal
(2) gb/t 3620.1 titanium and titanium alloy brand and chemical composition
（3） gb/t3620.2钛及钛合金加工产品化学成分及成分允许偏差
(4) gb 4698 sponge titanium, titanium and titanium alloys chemical analysis method
2. technical requirements
(1) the chemical composition of titanium and titanium alloy bars shall conform to gb/t 3620.1, and the allowable deviation of chemical composition shall conform to gb/t 3620.2 when repeated checks are required.
(2) the diameter or edge length of the hot-worked bar and its allowable deviation shall conform to table 1.
(3) the allowable deviation of the diameter of cold-drawn bars shall be in accordance with table 2 after hot-working, turning (grinding) and cold-rolling.
(4) the non-roundness of hot-processed polished bar after turning (grinding) should not be less than half of its size tolerance.
(5) the indefinite length of processed bar is 300-6000 mm, the indefinite length of annealed bar is 300-2000 mm, and the indefinite length of fixed length or double length should be within the indefinite length range. the allowable deviation of fixed length is 20 mm; the length of double length should also be included in the cut amount of bar, each cut amount is 5 mm. the length of fixed length or double length should be specified in the contract.
american standards: astm b348, astm f136, astm f67, ams4928
1. reference criteria
(1) tension test method of gb 228 metal
(2) gb/t 3620.1 titanium and titanium alloy brand and chemical composition
（3） gb/t3620.2钛及钛合金加工产品化学成分及成分允许偏差
(4) gb 4698 sponge titanium, titanium and titanium alloys chemical analysis method
2. technical requirements
(1) the chemical composition of titanium and titanium alloy bars shall conform to gb/t 3620.1, and the allowable deviation of chemical composition shall conform to gb/t 3620.2 when repeated checks are required.
(2) the diameter or edge length of the hot-worked bar and its allowable deviation shall conform to table 1.
(3) the allowable deviation of the diameter of cold-drawn bars shall be in accordance with table 2 after hot-working, turning (grinding) and cold-rolling.
(4) the non-roundness of hot-processed polished bar after turning (grinding) should not be less than half of its size tolerance.
(5) the indefinite length of processed bar is 300-6000 mm, the indefinite length of annealed bar is 300-2000 mm, and the indefinite length of fixed length or double length should be within the indefinite length range. the allowable deviation of fixed length is 20 mm; the length of double length should also be included in the cut amount of bar, each cut amount is 5 mm. the length of fixed length or double length should be specified in the contract.
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