Precipitation hardening stainless steel is a material with higher strength at room temperature and below 500°C. 05Cr17Ni4Cu4Nb (630) is a low-C martensite matrix that precipitates intermetallic compounds such as Cu and Nb to harden it. Its high temperature strength is still superior to 450°C. If it exceeds this temperature, its strength drops sharply.

(1) 07Cr17NiAl (07Cr17NiAl)

The steel is a semi-austenitic precipitation hardening stainless steel heat-resistant steel. Have good processing performance. It can be used for long-term working parts below 350°C, such as containers, pipelines high temperature springs, diaphragms, gaskets, bellows, etc. It is the most widely used precipitation hardening stainless steel at present.

(2) 06Cr17NiAlTi

The steel is a precipitation hardening stainless steel heat-resistant steel, which is a new steel type developed on the basis of 07Cr17NiAl steel by appropriately reducing the aluminum content and adding titanium. Aluminum can outline the oxidation resistance of steel, and the addition of titanium can prevent intergranular corrosion of steel. After solution treatment of the steel, the hardness of the steel is ≤32HRC, and the tensile strength is above 825MPa. The steel can be used for parts that are resistant to oxidation and corrosion and require high strength.

(3) 06Cr15Ni25Ti2MoAlVB (0Cr15Ni25Ti2MoAlVB)

The steel is an austenitic precipitation hardening stainless heat-resistant steel with high notch strength. When the temperature is lower than 980°C, its oxidation resistance is equivalent to that of 06Cr25NJ20 steel. Mainly used in the working environment below 700℃, requiring high strength and excellent candle resistance parts or equipment, such as steam turbine blades, rotors, skeletons, combustion chamber parts and standard parts, etc.