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51312-01097-Welding of Lean Duplex Stainless Steel grades: microstructure corrosion resistance and mechanical p

Product Number: 51312-01097-SG
ISBN: 01097 2012 CP
Author: David LARGE
Publication Date: 2012
$0.00
$20.00
$20.00
Recent price fluctuations of raw materials such as chromium and nickel have led to the development of stainless steel grades containing less nickel which are known as lean duplex stainless steels. Institut de Soudure has initiated a research project involving stainless steel manufacturers and end-users in order to study the weldability and properties of such grades.Investigations have been carried out on three lean duplex grades: UNS S32101 UNS S32202 and UNS S32304. Test pieces have been welded using several arc welding processes: GTAW GMAW using solid and cored wires plasma SAW and SMAW and two plate thicknesses 5 and 12 mm. These welded test pieces were then used for characterization work including metallographic examinations (in order to check weld quality and to measure the ferrite content) mechanical testing (hardness measurements tensile and impact tests) and pitting corrosion on welded joints. The influence of gas shielding upon ferrite content and pitting corrosion behaviour was also studied. Pitting corrosion of welded joints has been evaluated in terms of critical pitting temperature (CPT) using a modified ASTM G150 test method. CPT and pits location as well as mechanical results have been related to ferrite content and chemical analysis of both base metal and fusion zone. Keywords : Lean Duplex Stainless Steels welding pitting corrosion ferrite content mechanical properties.
Recent price fluctuations of raw materials such as chromium and nickel have led to the development of stainless steel grades containing less nickel which are known as lean duplex stainless steels. Institut de Soudure has initiated a research project involving stainless steel manufacturers and end-users in order to study the weldability and properties of such grades.Investigations have been carried out on three lean duplex grades: UNS S32101 UNS S32202 and UNS S32304. Test pieces have been welded using several arc welding processes: GTAW GMAW using solid and cored wires plasma SAW and SMAW and two plate thicknesses 5 and 12 mm. These welded test pieces were then used for characterization work including metallographic examinations (in order to check weld quality and to measure the ferrite content) mechanical testing (hardness measurements tensile and impact tests) and pitting corrosion on welded joints. The influence of gas shielding upon ferrite content and pitting corrosion behaviour was also studied. Pitting corrosion of welded joints has been evaluated in terms of critical pitting temperature (CPT) using a modified ASTM G150 test method. CPT and pits location as well as mechanical results have been related to ferrite content and chemical analysis of both base metal and fusion zone. Keywords : Lean Duplex Stainless Steels welding pitting corrosion ferrite content mechanical properties.
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