Specification for Tungsten and Oxide Dispersed Tungsten Electrodes for Arc Welding and Cutting Standard Sizes and Tolerances

1. Electrode diameters, lengths and tolerances

Standard electrode diameters, lengths and tolerance are given in Table 1. Other diameters, lengths, and tolerances may be as agreed on between the supplier and the purchaser.

2. Electrode roundness

Electrode shall fit through ring gages sized for their maximum allowable diameter in accordance with Table 1.

3. Finish

Tungsten electrodes shall be supplied with a ground finish. The ground finish designates that the electrodes have been cleaned of impurities after they have been center-less ground to a uniform size. It shall be supplied with a bright, polished surface. The maximum surface roughness shall be 0.8 μm Ra[32 μmin AARH].

4. Electrode straightness

The electrodes shall be straight such that any element of its surface, over a specified length, must lie between two parallel lines of a specified spacing where the two lines and the nominal axis of the electrode of the electrode share a common plane. The specified spacing is 0.5mm[0.020 in] over a length of 100mm[4 in].



 

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