Tweco XTTM-301 - Manual (Page 49)

Manual 0-4768 4-11 OPERATION
H. Cut Quality on Various Materials and Thicknesses
The chart defines the typical cut quality on various materials and thicknesses:
Plasma
Secondary
('Shield')
Carbon
Steel
Stainless Aluminum
Air
Air
0 - 1 inch
0 - 25.4 mm
Good Good Good
1/4 - 1/2 inch
6.4 - 12.7 mm
NR NR Excellent
1/2 - 1 inch
12.7 - 25.4 mm
NR Excellent Excellent
0 - 3/8 inch
0 - 9.5 mm
Good NR NR
3/8 - 1 inch
9.5 - 25.4 mm
Excellent NR NR
Typical Cut Quality on Various Materials
O2
H35
(Ar/H2)
Gases Material
Thickness
N2
Air
Description of Cut Characteristics:
Excellent - Minimum bevel (0 - 4°), minimum kerf (2 x tip orifice diameter), little or no dross, smooth cut surface.
Good - Slight bevel (0 - 10°), slightly wider kerf (2-1/2 x tip orifice diameter), some dross (easily removed), medium-
smooth cut surface, slight top edge rounding.
Fair - Excessive bevel (over 10°), wide kerf (over 2-1/2 x tip orifice diameter), medium to heavy dross, rough cut surface,
top edge rounding.
NR - Not Recommended.
NOTE
Cut quality depends heavily on set-up and parameters such as torch standoff, alignment with the workpiece, cutting
speed, gas pressures, and operator ability.