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Materials
/ Ni-Resist
Austenitic
grades of cast iron are characterized by having
a stable austenitic basic structure even at room
temperature. Most grades are also referred to by
their trade name “Ni-Resist” because
they contain at least 20% nickel, which is the main
reason for the austenitic structure. Compared to
unalloyed and low-alloyed grades of cast iron, austenitic
grades have a range of “exceptional”
properties. These include the following: :
• Good scaling resistance
• High resistance to heat
• High elongation at fracture
• Cold toughness
• Exceptional thermal expansion performance,
which is adjustable within certain limits
• Resistance to corrosion from sea water and
alkaline media
• Resistance to erosion
• Non-magnetizable
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With this
profile of properties, austenitic varieties of cast
iron offer an alternative to non-corrosive, heat-resistant
steels and even, in some cases, to Ni base super
alloys. In comparison to these, they offer numerous
economical advantages because the process control
involved in production is simpler.
Techn.
Information (PDF) |
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