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Optimal Composition Window of Type 410 Welding Consumables and Base Metals for Hydro-processing

Type 410 martensitic stainless steel is currently used for its sulfide corrosion resistance in downstream hydro-processing installations and was chosen over austenitic stainless steels due to its superior resistance to halide and polyphonic acid stress corrosion cracking found in a hydro-processing environment. During fabrication, the welding of 410 base materials with generic E410 and ER 410 consumables resulted in insufficient weld properties such as cracking, loss of toughness and excessive hardness. This problem was overcome by the development of selection guidelines by Shell which recommended an increase in Ni content over Generic 410 consumables. Demand for a modified consumable has not been large enough for manufactures to economically produce sufficient quantities for Shell and has created a limited market. To circumvent this, there has been a push to refine the alloy window in a selection criterion to produce acceptable weld properties conducive to Shells’ applications.

This is currently being done through a model based DOE using ThermoCalc and Dictra while validating results through the use of SS-DTA, metallography, dilatometry and other techniques. 

 

Industry Sponsor: Shell

Faculty: Boian Alexandrov (OSU)

Graduate Student: David Stone

Industry Contact: Jorge Penso