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 Cutting Manganese Steel
Table 4-4 gives a few examples of the conditions used
properties of this material. Do not preheat the entire
to obtain very high quality, slag free cuts with
piece since Hadfield's manganese steel becomes
Hadfield's manganese steel.
embrittled if heated above 500F.
Preheating for hand cutting can be accomplished by
TABLE 4-4. Hadfield's Manganese
using the torch to heat several inches ahead of the cut
Steel Cutting Conditions
and then dropping back to make the cut. Preheating
Metal
Preheat
cutting
cutting
can also be performed with another torch.
Thickness
Tip
Tip
Speed
(inches)
(ipm)
For machine cutting, pre-heating is best accomplished
FS-56
FS-61
30-32
7/16
by positioning the preheat torch about 3 in. ahead of
FS-54
23
FS-56
3/4
the cutting tip. Use a cutting tip about the same size as
H-O
FS-54
25
3/4
the heating tip or use the MAPP H-O heating tip.
Pressure (PSIG)
MAPP
Oxygen
Select cutting tip size the same as when selecting tips
Gas
for mild carbon steel. MAPP FS tips provide the best
preheat pattern. Use only standard pressure tips since
7/16
7
30-40
cutting oxygen pressure should be from 30-40 psig
3/4
7
30-40
(pounds per square inch gauge).
3/4
7
30-40
4-23
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