Special Stainless Steel

Stainless steel normally refers to the chromium content in the steel is more than 12.5%, with high corrosion resistance property to external media (acid, alkali, salt, etc.). According to the crystal structure of the steel, stainless steel can be divided into martensitic, ferritic, austenitic, ferritic-austenitic, precipitation hardening stainless steel.

Special stainless steel, compared with ordinary stainless steel, is high-alloy stainless steel in chemical composition with higher nickel, higher chromium, or higher molybdenum, and its operating temperature or corrosion-resistant property is more excellent then ordinary stainless steel. The metallographic structure of special stainless steel is stable austenitic. The manufacturing process of high-alloy special stainless steel is complicated, generally, using traditional techniques to produce special stainless steel, such as casting, forging, rolling, and so on.

Special stainless steel is widely used in following fields, (1) marine: marine structures in marine environment, desalination, aquaculture, seawater heat exchange, etc. (2) environmental protection: flue gas desulfurization appliance of thermal power generation, waste-water treatment, etc. (3) energy: nuclear power, coal utilization, tidal power generation, etc. (4) petrochemical industry: oil refining, chemical engineering equipment, etc. (5) food: salt manufacturing, soy making and so on.

Domestic and foreign designations: