Has good formability and good weldability, can be used as ultra-high strength materials in the nuclear industry, aerospace and aerospace industry applications.
Cr-Ni series (300 series), Cr-Mn-Ni series (200 series), heat-resistant chrome alloy steel (500 series) and precipitation hardening series (600 series) can be classified into Cr series (400 series).
200 series: chromium - manganese - nickel
201, 202, etc .: to manganese and nickel, corrosion resistance is relatively poor, widely used as a domestic 300 series of cheap alternatives
300 series: chromium - nickel austenitic stainless steel
301: good ductility, for molding products. It can also be rapidly hardened by machining. Weldability is good. Wear resistance and fatigue strength is better than 304 stainless steel.
302: the same corrosion resistance with 304, due to relatively high carbon content and therefore better strength.
303: by adding a small amount of sulfur, phosphorus more easily cut than 304.
304: General type; that is, 18/8 stainless steel. Products such as: corrosion-resistant containers, tableware, furniture, railings, medical equipment. The standard composition is 18% chromium plus 8% nickel. For the non-magnetic, can not by heat treatment to change the structure of the microstructure of stainless steel. GB grade 10Cr18Ni9Ti.
304 L: the same characteristics with the 304, but it is more low-carbon corrosion resistance, easy to heat treatment, but poor mechanical properties of welding and not easy to heat treatment of the product.
304 N: the same characteristics and 304, is a nitrogen-containing stainless steel, nitrogen is to increase the strength of steel.