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Table 2. Recommended Guide for Shade Numbers (Adapted from ANSI Z49.1-2012)
Operation
Shielded Metal Arc Welding
(SMAW)
Gas Metal Arc welding
(GMAW or MIG) and flux
Core Arc Welding (FCAW)
Gas Tungsten Arc Welding
(GTAW or TIG)
Carbon Arc Cutting – Air
(CAC-A)
Plasma arc welding (PAW)
Plasma arc cutting (PAC)
Electrode Size in.
(mm)
Less than 3/32 (2.4)
3/32 – 5/32 (2.4 – 4.0)
5/32 – 1/4 (4.0 – 6.4)
More than 1/4 (6.4)
Light
Heavy
Minimum
Arc Current
Protective
(Amps)
< 60
60-160
160-250
250-550
< 60
60-160
160-250
250-550
< 50
50-150
150-500
< 500
500-1000
< 20
20-100
< 20
20-40
40-60
60-80
80-300
300-400
400-800
9
Recommended*
Shade Number
Shade
7
—
8
10
10
12
11
14
7
—
10
11
10
12
10
14
8
10
8
12
10
14
10
12
11
14
6
6-8
8
10
10
12
11
14
4
4
5
5
8
8
8
8
8
9
9
12
10
14
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