S32750 is a ferritic austenitic (duplex) stainless steel that combines the beneficial properties of many ferritic and austenitic steels. Due to its high chromium and molybdenum content, the steel has excellent resistance to spot corrosion, crevice corrosion, and uniform corrosion. The dual phase microstructure ensures that the steel has high resistance to stress corrosion cracking and high mechanical strength.
Corresponding brand:
| Grade | New Grade | Old Grade | JIS | ASTM | ||||||||||||
| S25073 | 022Cr25NiTMo4N | S32750 | ||||||||||||||
| UNS | SAE | DIN | EN | Other | ||||||||||||
| F53 | 2507 | 1.441 | X10CrNiMo18-9 | |||||||||||||
| x2cmimon25-7-4 | ||||||||||||||||
Chemical composition:
| % | C | Si | Mn | P | S | Cr | Ni | Mo | N | Cu | ||||||
| Min | 一 | 一 | 一 | 一 | 一 | 24 | 6 | 3 | 0.24 | 一 | ||||||
| Max | 0.03 | 0.8 | 1.2 | 0.035 | 0.02 | 26 | 8 | 5 | 0.35 | 0.5 | ||||||
Physical performance:
| melting point/℃ | Specific heat capacity | Thermal conductivity/w/(m.k) | linear expansion coefficient | resistivity | Longitudinal elastic modulus | |||||||||||
| /kg/(kgk)C | 100~500℃ | /(10-6/k) | /(Ω.mm2/m) | /GPa | ||||||||||||
| 0~100℃ | 100~500℃ | 20℃ | 20℃ | |||||||||||||
| 0.46 | 14 | 12 | 185 | |||||||||||||
| density g/cm | hardness HBW | hardness HRB | magnetism | |||||||||||||
| 7.8 | Solid solution state 227 | 29 | have | |||||||||||||
Application field:
Used in the oil and gas industry; Offshore rock breaking oil platforms (heat exchanger pipes, water treatment and supply systems, fire protection systems, sprinkler systems, water stabilization systems; petrochemical equipment; desalination equipment (and high-pressure pipes and seawater pipes in the equipment); Mechanical and structural components that require both high strength and high corrosion resistance; Fuel (waste) gas purification equipment. It is a steel with excellent local corrosion resistance in duplex stainless steel, characterized by excellent resistance to pitting corrosion, high strength, chloride stress corrosion resistance, and weldability. It is very suitable for heat exchange equipment in chemical, petroleum, petrochemical, and power industries that use river water, groundwater, and seawater as cooling media.
