Stainless steel bar is made of stainless steel ingot by hot rolling, forging or cold drawing process of rod-like material, has a wide range of applications and a variety of excellent physical and chemical properties. Stainless steel rods can be divided into Cr system (SUS400), CR-Ni system (SUS300), CR-Mn-Ni (SUS200) and precipitation hardening system (SUS600) according to composition. Among them, Cr-Ni stainless steel, especially 300 series stainless steel, because of its excellent corrosion resistance, heat resistance and mechanical properties, become the most widely used type of stainless steel . The main characteristics of stainless steel rods include good corrosion resistance, heat resistance, low temperature strength and mechanical properties. It is widely used in hardware kitchenware, shipbuilding, petrochemical, machinery, medicine, food, power, energy, building decoration and other industries, is an indispensable key material in these industries .
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