1.ungsten Plate, Sheet, Foil
Table 1 Chemical Compositions
Grade Chief Impurity Maximum，%
W O Fe Mo K Al Si others
W-1 ≥99.95 0.5 0.002 0.003 0.006∽0.016 .0.003∽0.01 0.015∽0.033 0.001
ASTM B760-86 or GB/T3875-83. Special requirements to be agreed on by the supplier and buyer.
Table 2 Size and Tolerance
Thickness, mm Tolerance,±mm Width, mm Tolerance, mm Length, mm Tolerance, mm Status
＜0.2 0.01∽0.02 50~150 ＋2.0／－0 500 ＋2.0／－0 Cold rolling
0.3 0.01∽0.03 50~250 ＋2.0／－0 500 ＋2.0／－0
0.4 0.01∽0.04 50~250 ＋2.0／－0 500 ＋2.0／－0
0.5 0.01∽0.05 50~300 ＋2.0／－0 500 ＋2.0／－0
0.8 0.02∽0.08 50~300 ＋0.4／－0 500 ＋0.4／－0
1.0 0.02∽0.10 50~300 ＋0.4／－0 600 ＋0.4／－0
1.5 0.02∽0.15 50~400 ＋0.4／－0 600 ＋0.4／－0
2.0 0.02∽0.20 50~500 ＋0.4／－0 700 ＋0.4／－0
3.0 0.02∽0.30 50~500 ＋0.4／－0 600 ＋0.4／－0 Hot rolling
4.0 0.02∽0.40 50~500 ＋0.4／－0 600 ＋0.4／－0
≥5.0 0.05∽0.40% 50~550 ＋0.4／－0 600 ＋0.4／－0
