ASME SFA-5.12! c; B) ?5 S5 I: J- B
用于弧焊和切断的钨和钨合金电极规范9 y2 N+ L( c# n4 U
Specification for Tungsten and Tungsten-Alloy Electrodes for Arc Welding and Cutting& o% k1 O* t7 g* w6 R' Q9 c
$ g9 d6 I' L8 V) |% N; T% OISO 6848:2004 specifies requirements for classification of nonconsumable tungsten electrodes for inert gas shielded arc welding, and for plasma welding