Weld Repair of Stainless Steels and Nickel Alloys
Gary Coates, Nickel Institute
There is often a need to weld on or repair materials after they have been in service. This may be due to modifications to the process, accidental mechanical damage, or corrosion damage. There are many challenges for the maintenance team to weld on stainless steels and nickel alloys that have been in service. This training will review:
- Knowing the exact material to be welded and if it can be weld repaired
- Selection of filler metals and welding processes
- Preparation for welding and post-weld treatments which alloys can change and what conditions will cause changes to the properties of the material
- Difference between welding for high temperature services and corrosive services
The learning goal will be knowledge on how to weld repairs of stainless steel and nickel alloys quickly, long lasting and safely.
Properties and Applications of Duplex Stainless Steels
Jan Li, Outokumpu
Dragon Hao, Alleima
Part I covers microstructure and classifaction of DSS, common steel grades, properties (strength, physical properties and corrosion resistance), fabrication (cold forming, thermal processing, welding recommendation and machining), and standards for production and delivery.
Part II introduces applications in the industries of oil & gas production, oil refining, chemical synthesis, transportation, pulping, hydrometallurgy, sea water desalination, storage tanks, environmental protection and construction and building. Utilize characteristics of good corrosion resistance, high yield strength, low thermal expansion and cost saving solution of duplex stainless steels.