SS304 CHEMICAL COMPOSITION PDF

Stainless steel grade 1. Corrosion Resistance has excellent corrosion resistance in may environments and when in contact with different corrosive media. Pitting and crevice corrosion can occur in environments containing chlorides. In this instance L is recommended due to its resistance to carbide precipitation. This material will retain aqueous corrosion resistance. Fabrication Fabrication of all stainless steels should be done only with tools dedicated to stainless steel materials.

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Stainless steel grade 1. Corrosion Resistance has excellent corrosion resistance in may environments and when in contact with different corrosive media. Pitting and crevice corrosion can occur in environments containing chlorides. In this instance L is recommended due to its resistance to carbide precipitation.

This material will retain aqueous corrosion resistance. Fabrication Fabrication of all stainless steels should be done only with tools dedicated to stainless steel materials. Tooling and work surfaces must be thoroughly cleaned before use. These precautions are necessary to avoid cross contamination of stainless steel by easily corroded metals that may discolour the surface of the fabricated product.

Cold Working stainless steel readily work hardens. Fabrication methods involving cold working may require an intermediate annealing stage to alleviate work hardening and avoid tearing or cracking. At the completion of fabrication a full annealing operation should be employed to reduce internal stresses and optimise corrosion resistance. The fabricated components should then be rapidly cooled to ensure maximum corrosion resistance.

Machinability has good machinability. Machining can be enhanced by using the following rules: Cutting edges must be kept sharp. Dull edges cause excess work hardening. Cuts should be light but deep enough to prevent work hardening by riding on the surface of the material. Chip breakers should be employed to assist in ensuring swarf remains clear of the work.

Low thermal conductivity of austenitic alloys results in heat concentrating at the cutting edges. This means coolants and lubricants are necessary and must be used in large quantities. Heat Treatment stainless steel cannot be hardened by heat treatment. Weldability Fusion welding performance for type stainless steel is excellent both with and without fillers.

Recommended filler rods and electrodes for stainless steel is grade stainless steel. For L the recommended filler is L. Heavy welded sections may require post-weld annealing. This step is not required for L. Grade may be used if post-weld heat treatment is not possible. Chemical Compositionsa.

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Type stainless steel is not magnetic, but may be slightly magnetic after cold working. Carbon and chromium combine to form chromium carbide, which precipitates at the crystal boundary, so the Cr content near the grain boundary is greatly reduced, and becomes a Cr-depleted region. Therefore, its corrosion resistance is lowered. Use ultra-low carbon austenitic stainless steels, such as L and L , can reduce the formation of chromium carbide and reduce the probability of chromium-depleted envelope. Heat Treating Stainless Steel The following is the heat treating stainless steel, such as annealing, forging, hardening, stress relieving, etc.

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