That 48-19-315-89. The molybdenum strip for electron-tube industry, the untreated. Specifications.
1. Technical requirements Tu 48−19−315−89
1.1. Molybdenum strip shall conform to the requirements of this specification.
1.2. The nominal dimensions of the strips and the length (from 100−300) meets the following requirements.
|Name||Thickness, mm.||pred. deviations||Width, mm||pred. deviations|
|Strip cold-rolled||from 0.10 to 0.20 using 0,05||±0,015||from 50 to 150 in 10||±1,0||300|
|from 0,25 to 0,35 0,05 using||±0,020||200|
|0.40 to 0.50 mm through 0,05||±0,030||150|
|Strip hot-rolled||0,60||±0,030||from 50 to 150 in 10||±5,0||150|
|ranging from 0.70 to 1.00 across 0,10||±0,050|
|the range of 1.10 to 2.00 via 0,10||±0,070|
|from 2,10 to 3.50 via 0,10||±0,120||100|
|The component name||Mass fraction, %|
|Determined impurities, %, not more|
1.5. The surface should be degreased. By agreement with the consumer on the surface of the strips allowed traces of the technological lubricant. On the surface of the bundle and the oxides are not allowed.
Inspecting the sign are:
- prints rolls, shell-wdwy, traces of Stripping, if it does not take the strip beyond the permissible deviations in thickness, not more than 5 pieces of each defect at a controlled length: 300, 200, 150 and 100 mm, respectively for intervals of the thicknesses specified in the table. 1;
- mechanical damage in the form of scratches, if it does not take the strip beyond the permissible deviations in thickness;
- the strips with thickness (0,10−0,30)mm — total waviness, disappearing when you minimize the roll diameter (50−60)mm.
1.7. Cold-rolled strip thickness (0,1−0,5) mm shall withstand bending to parallelism of sides around the mandrel with a radius specified below. To bend the ground should not be tears.
|Strip thickness, mm||The radius of mandrel, mm|
|Thickness, mm||Tensile strength, MPa (kgf/cm2), not less||d5 along rolling||d5 across rolling|
d5 — elongation %, not less.1.9. The depth of the wells Eriksen for cold-rolled thickness (0,2−0,5) mm should meet the following requirements.
|Strip thickness, mm||The depth of the wells, mm|
1.11. By agreement between the manufacturer and the consumer of molybdenum strip are manufactured with the following tolerances for flatness: flatness deviation along the rolling direction (deflection) should be no more than 10% of the measured length of the band; the deviation from flatness across the direction of rolling (warpage) should be no more than 5% of the measured width.
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