Recommended Practices For Spot Welding Low-Carbon Steel |
Thickness
"T" of Thinnest
Out WorkPiece
(B)(C)(D) | Electrode Diameter & Shape
(E) | Net Electrode
Force | Weld Time
(Single Impulse
Cycles) | Welding
Current
(Approx) | Minimum
Contracting
Overlap | Minimum Weld Spacing(F) | TYPE
OF
STEEL |
| Inches | Max. Dia./In | Lbs | 60 per Sec | AMPS | Inches | | SAE 1010, 301, 302, 303,304, 308, 309, 310, 316, 317, 321, 347, 349 |
| 0.010 | 1/8" | 200 | 4 | 4000 | 3/8" | 1/4" |
| 0.010 | 1/8" | 230 | 3 | 2000 | 3/16" | 3/16 |
| 0.012 | 1/8" | 260 | 3 | 2000 | 1/4" | 1/4" |
| 0.014 | 1/8" | 300 | 4 | 2200 | 1/4" | 1/4" |
| 0.016 | 1/8" | 330 | 4 | 2500 | 5/16" | 1/4" |
| 0.018 | 1/8" | 380 | 4 | 2800 | 5/16" | 1/4" |
(B)Materials should be free from scale, oxides, paint andoil
(C) Welding Conditions determined by thickness ofthinnest outside workpiece "T"
(D) Data for total thickness of pile-up not exceeding 4"T" maxinum ratio between two thickness 3 to 1
(E) Electrode Material: Class 2:
Minimum Conductivity_______75% of Copper
Minimum Hardness_________75% Rockwell "B"
(F) Minimum weld spacing is that spacing for two piecesfor which no special measures need be taken tocompensate for shunted current effect of adjacent welds.for three workpieces, increase spacing 30 persent. |
