Cut charts -15, Mild steel, English – Hypertherm HT4400 HySpeed Plasma Arc Cutting System User Manual
Page 74: Metric
HT4400
Instruction Manual
4-15
9
Mild Steel
O
2
Plasma / Air Shield
400 Amps
Straight and Bevel Cutting to 45°
Air
Flow Rates @ 120 psi / 8.3 bar
(scfh / slh)
Air
O
2
Preflow
184.3 / 5220
58.8 / 1662
Cutflow
167.5 / 4740
92.2 / 2610
120786
Retaining Cap
120934
Nozzle
120939
Swirl Ring
120810
(standard)
Electrode
*
Piercing not recommended
**
Cuts on these thicknesses may result in increased cut angle variation and surface roughness. Reduce cut speed by
5%-10% for improvement with some materials.
Minimum inlet pressures remain at one setting of 120 psi (8.3 bar) for all material thicknesses.
Approximate pressures while cutting in RUN mode:
PG1
75
PG2
38
+
SilverPlus provides increased life in most applications. The hafnium wears to approximately twice the depth of an all
copper electrode (120810 400VA and 120802 300A). Arc voltage may need to be increased by 5-15 volts throughout
the electrode life to maintain proper cut height parameters.
MV1 MV2 MV3 MV4 MV5
MV6 MV7 PG1 PG2 PG1 PG2
Inches
Volts
in.
mm
ipm
mm/m
in.
mm
seconds
3/8**
135
.125
3
195
4950
.250
6
0.4
1/2**
138
.157
4
160
4060
.314
8
0.5
5/8
140
.157
4
120
3050
.314
8
0.6
3/4
142
.157
4
95
2413
.314
8
0.7
7/8
145
.188
5
80
2032
.375
10
0.8
1
145
.188
5
70
1778
.375
10
1
1-1/8
145
.188
5
60
1520
.375
10
1.4
1-1/4
148
.188
5
55
1400
.375
10
1.9
1-1/2
150
.188
5
40
1020
*
*
*
2
175
.250
6
15
381
*
*
*
Arc
Voltage
English
Test
Preflow
Verify (psi)
Test
Cutflow
Verify (psi)
Material
Thickness
Test Preflow and Cutflow Adjust (psi)
Plasma
Shield
Plasma
Shield
36
43
68
38
43
38
38
68
0
0
10
Cutting
Speed
Torch-to-Work
Distance
Initial Pierce
Height
Pierce
Delay
Time
MV1 MV2 MV3 MV4 MV5
MV6 MV7 PG1 PG2 PG1 PG2
mm
Volts
mm
in.
mm/m
ipm
mm
in.
seconds
10**
135
3
.125
4718
186
6
.250
0.4
12**
138
4
.157
4301
169
8
.314
0.5
15
140
4
.157
3320
131
8
.314
0.6
20
142
4
.157
2298
91
8
.314
0.7
22
145
5
.188
2053
81
10
.375
0.8
25
145
5
.188
1806
71
10
.375
1
30
145
5
.188
1468
58
10
.375
1.2
32
148
5
.188
1386
55
10
.375
1.4
35
150
5
.188
1204
47
10
.375
1.9
40
155
5
.188
929
37
*
*
*
50
175
6
.250
421
17
*
*
*
Arc
Voltage
Torch-to-Work
Distance
Cutting
Speed
Metric
Initial Pierce
Height
Pierce
Delay
Time
Plasma
Shield
Plasma
Shield
Test Preflow and Cutflow Adjust (psi)
Test
Preflow
Verify (psi)
Test
Cutflow
Verify (psi)
Material
Thickness
68
0
0
10
43
38
38
36
43
68
38
220412
+
(optional)
SilverPlus
electrode