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Plate Thickness (in.) 1/16 3/32 1/8 3/16 1/4 1/2
mm. 1.6 2.4 3.2 4.8 6.4 12.7
Current DC(–) 80 - 100 100 - 120 120 - 140 200 - 250 200 - 350 225 - 375
Electrode Diameter (in.) 1/16 1/16 1/16 3/32 1/8 1/8
mm. 1.6 1.6 1.6 2.4 3.2 3.2
Gas Flow, Argon (cfh) 10 10 10 15 20 25
L/min.. 4.7 4.7 4.7 7.1 9.4 11.8
Filler-Rod Diameter (in.) 1/16 1/16 3/32 1/8 1/8 1/8
mm. 1.6 1.6 2.4 3.2 3.2 3.2
Arc Speed (ipm) 12 12 12 10 88
mm/sec 5.1 5.1 5.1 4.2 3.4 3.4
Total Time (hr/ft of weld) 0.0167 0.0167 0.0167 0.0200 0.0250 0.0250
hr/m. of weld 0.0548 0.0548 0.0548 0.0656 0.0820 0.0820
FIGURE 18 — Suggested procedures for GTAW of butt, corner, tee and lap joints in stainless steels.
Plate Thickness, T (in.) 1/16 3/32 1/8 3/16 1/4 1/2
mm. 1.6 2.4 3.2 4.8 6.4 12.7
Current DC(–) 90 - 110 110 - 130 130 - 150 225 - 275 225 - 350 225 - 375
Electrode Diameter (in.) 1/16 1/16 1/16 3/32 1/8 1/8
mm. 1.6 1.6 1.6 2.4 3.2 3.2
Gas Flow, Argon (cfh) 10 10 10 15 20 25
L/min.. 4.7 4.7 4.7 7.1 9.4 11.8
Filler-Rod Diameter (in.) 1/16 1/16 3/32 1/8 1/8 1/8
mm. 1.6 1.6 2.4 3.2 3.2 3.2
Arc Speed (ipm) 10 10 10 888
mm/sec 4.2 4.2 4.2 3.4 3.4 3.4
Total Time (hr/ft of weld) 0.0200 0.0200 0.0200 0.0250 0.0250 0.0250
hr/m. of weld 0.0656 0.0656 0.0656 0.0820 0.0820 0.0820
For vertical-up and overhead, decrease current 10 to 20%.