9 2.
WELDING CONDITIONS MANUAL
WELDING OF MAGNESIUM (AZ31B & HK31A ALLOYS) Using A.C.H.F.
Welding Current Amperes*
Shielding Thick-
Type of Flat
Position Welding Rod
Gas Flow ness
in. Weld (1)
HK31A AZ31
B (2) Size, in.
Argon Helium Remarks
0.040 Butt
40 35
3/32, 1/8 10
25 Backup
0.040 Butt
30 25
3/32, 1/8 10
25 No
backing 0.040
Fillet 40
35 3/32,
1/8 10 25
0.064 Butt
55 50
3/32, 1/8 10
25 Backup
0.064 Butt
& 35
30 3/32,
1/8 10 25
No backing Corner
0.064 Fillet
55 50
3/32, 1/8 10
25 0.081
Butt 75
65 1/8
10 25
Backup 0.081
Butt, Corner 45
40 1/8
10 25
No backing &
Edge 0.081
Fillet 75
65 1/8
10 25
0.102 Butt
95 85
1/8 20
30 Backup
0.102 Butt,
Corner 70 60
1/8 20
30 No
backing &
Edge 0.102
Fillet 95
85 1/8
20 30
0.128 Butt
110 100
1/8, 5/32 20
35 Backup
0.128 Butt,
Corner 80 70
1/8, 5/32 20
35 No
backing &
Edge 0.128
Fillet 110
100 1/8,
5/32 20 35
3/16 Butt
155 140
1/8, 5/32 20
35 1
pass 3/16 Butt
110 100
1/8, 5/32 20
35 2
passes 1/4 Butt
200 180
5/32, 3/16 25
50 1
pass 1/4 Butt
125 115
5/32 20
35 2
passes 3/8 Butt
270 250
5/32 , 3/16 25
50 1
pass 3/8 Butt
160 140
5/32, 3/16 25
50 2
passes 1/2 Butt
330 310
3/16 25
50 2
passes 3/4 Butt
450 420
3/16, 1/4 35
75 2
passes *Current
values given for butt joint welding are with backing plate. Slightly lower values
used for welding without a backing plate.
