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Stainless steel Cr21Ni33TiAl (Incoloy 800, NiCrTiAl33-21) can be used as heat or/and creep resistant for many applications. The study of stainless material Cr21Ni33TiAl was intent on a rate of workability, resistance to stress corrosion, susceptibility to intergranular corrosion and pitting, resistance in high temperature sulphate melt environments. Solutions of these partial tasks to define primary...
The stainless steels and related alloys with sufficient resistance to a general corrosion can be susceptible to a localized corrosion in passive state (pitting, cracking, intergranular corrosion) in certain environment under specific conditions. The Drop Evaporation Test (DET) was developed for study of stainless materials resistance to stress corrosion cracking (SCC) at elevated temperatures 100...
Stress corrosion cracking (SCC) can cause a dangerous failure of structural parts under specific combination of material, environment and loading. For testing of the resistance to SCC at higher temperatures (100-300°C) in water environments were proposed several methods. The Drop Evaporation Test (DET) is useful for comparison and evaluation of resistance of stainless steels and related alloys to...
Segregation of phosphorus and silicon at the grain boundaries in austenitic stainless steels is known to make these steels susceptible to intergranular corrosion in strongly oxidizing environments. This behavior is more pronounced in steels containing phosphorus and normal contents of silicon, other conditions being equal. Considering the interrelationship between the changes in the relative free...
These last years, beside the austenitic-feritic (duplex) stainless steels grades, some high alloyed austenitic stainless steels with molybdenum contents and/or modified with nitrogen, wolfram and silicon contents have been developed. The nitrogen addition in these grades has been increased to 0,55% in order to obtain both high mechanical properties and high corrosion resistance. The steels with a...
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