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Austenitic
stainless steel is one of the most outstanding alloys of our time,
with a worldwide distribution restricted by one problem - high costs
due to difficulties in machining.
To offer an acceptable
solution, the metallurgist has studied the problem and the producer
has marketed Type 303, a Type 304 (18/8 stainless alloy) with a
content of sulphur ten times greater.
The solution with Type
303 has two aspects:
1) a greatly increased machinability:
2)
a reduced resistance to corrosion and fatigue due to the higher
content of sulphides present in the structure.
The research
departments of Acciaierie Valbruna have created a new product which
offers the right solution to the problem of corrosion and fatigue,
whilst still maintaining a high degree of machinability.
The
result is Maxival®.
Maxival® is a technologically advanced
product which offers a high machinability standard without
penalising mechanical properties and the resistance to
corrosion.
The basic idea behind Maxival® is the substitution of
the high sulphur content, producing a steel with well distributed
inclusions which:
1) break the 'chips' on machining;
2) do
not wear nor overheat the tools;
3) do not weaken the metallic
matrix;
4) do not create corrosion points.
Maxival® is a
stainless steel resistant to corrosion, weldable and mechanically as
strong as Type 304 and 316, but with machinability comparable to
Type 303.
The advantages offered to a machine shop when
working with Maxival® are:
1) a greater number of machined
pieces;
2) less tool wear;
3) a reduction in down times for
tool replacement.
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