SUS630 is a martensitic precipitation hardening stainless steel. High strength, high hardness, good weldability and corrosion resistance. Has been widely used in the promotion of the valve, shaft and chemical fiber industry, and has a high strength corrosion requirements of parts.
Features:
By the copper, niobium / columbium constitute the precipitation hardening martensitic stainless steel, low carbon content, corrosion resistance and weldability of martensitic stainless steel than normal number, similar in 18-8 stainless steel, heat treatment process is simple, cutting good, but the name is difficult to meet the deep, cold-type processing.
     Microstructure: the organization is characterized by precipitation hardening.
Uses:
Used in the manufacture of high corrosion resistance, high strength parts, such as bearing type, turbine parts.
Chemical composition
Carbon C: ≤ 0.07
     Si Si: ≤ 1.00
     Manganese Mn: ≤ 1.00
     Sulfur S: ≤ 0.030
     Phosphorus P: ≤ 0.035
     Chromium Cr: 15.50 ~ 17.50
     Ni-Ni: 3.00 ~ 5.00
     Cu Cu: 3.00 ~ 5.00
     Niobium Nb: 0.15 ~ 0.45
SUS630 alloy is precipitation hardening, martensitic stainless steel, and this level has a high strength, hardness and corrosion resistance properties. After heat treatment, the mechanical properties of the product more complete, can reach up to 1100-1300 mpa (160-190 ksi) of compressive strength. This class can not be used above 300 ℃ (570F) or very low temperatures, dilute acid or its salt air and has good corrosion resistance, corrosion resistance and its 304 and 430 the same.