
Table 1 — recommended protection levels for arc welding
1, 5 6 10 15 30
40 60 70
100 125 150 175 200 225 250 300 350 400 450 500 600
1, 5 6 10 15 30
40 60 70
100 125 150 175 200 225 250 300 350 400 450 500 600
8 9 10 11
12 13 14
8
9 10 11 12
13 14
8 9 10 11
12 13
e 9 10 11
12 13 14
10 11 12 13 14
10 11 12 13 14 15
9 10 11 12
13
4 5 6 7 8 9 10
11 12
Pr
oc
ess
Coa
ted
elec
tr
odes
M
AG
TIG
MIG f
or
hea
vy metals
MIG f
or
ligh
t allo
ys
A
rc goug
ing
Cutting with plasma str
eam
M
icr
oplasma
w
elding
Cur
ren
t
A
Caution: the t
er
m
“hea
vy metals
” applies t
o st
eels
, st
eel allo
ys
, c
opper
, c
opper allo
ys et
c.