welding consumables

Sandvik duplex

Sandvik

Duplex and super duplex stainless steel are special types of stainless steel materials with excellent corrosion resistance and mechanical properties. In order to ensure the quality of welded joints, corresponding duplex and super duplex stainless steel welding materials are needed.

Duplex stainless steel welding materials are alloys composed of chromium, nickel, molybdenum, manganese and other elements, which have the advantages of high strength, high toughness and good corrosion resistance. The welded joints of duplex stainless steel welding materials usually have good corrosion resistance and mechanical properties, and are widely used in marine engineering, chemical, pharmaceutical and other fields.

Super duplex stainless steel welding materials are a new type of welding material developed based on duplex stainless steel. They not only have the advantages of duplex stainless steel, but also have higher strength and better corrosion resistance. Super duplex stainless steel welding materials usually contain more chromium, molybdenum, nitrogen and other elements, which can enhance the corrosion resistance and mechanical properties of welded joints, and are widely used in marine engineering, petrochemical, shipbuilding and other fields.

Sandvik duplex and super-duplex series

Name Chemical composition Mechanical properties Corrosion resistance properties Applications
Sandvik 2205 Cr: 22%, Ni: 5.5%, Mo: 3.2%, N: 0.17% YS≥450MPa，A≥25% Resistant to seawater, chloride and sulfuric acid. Petrochemical,offshore,shipbuilding
Sandvik 2507 Cr: 25%, Ni: 7%, Mo: 4%, N: 0.3% YS≥550MPa，A≥25% Resistant to seawater, chlorides, sulfuric acid, and hydrofluoric acid. Petrochemical,offshore,shipbuilding
Sandvik SAF 2707 HD Cr: 25%, Ni: 9%, Mo: 4%, N: 0.3% YS≥550MPa，A≥25% Resistant to seawater, chlorides, sulfuric acid, and hydrofluoric acid. Petrochemical,offshore,shipbuilding
Sandvik 22.9.3.L Cr: 22%, Ni: 9%, Mo: 3%, N: 0.2% YS≥550MPa，A≥35% Resistant to seawater, chloride and sulfuric acid.酸 Petrochemical,offshore,shipbuilding
Sandvik 254 SMO Cr: 20%, Ni: 18%, Mo: 6.1%, Cu: 0.7%, N: 0.3% YS≥300MPa，A≥35% Resistant to chloride, nitric acid, sulfuric acid, chlorinated acids, and organic acids. Chemical, petrochemical, pulp and papermaking, etc.

It should be noted that the performance and corrosion resistance of welding materials may decrease due to factors such as heat input and residual stress during the welding process. Therefore, in practical applications, it is necessary to select welding processes and materials based on specific conditions.。