English
Mechanical Engineering and Equipment Industry
The machinery manufacturing and equipment sector operates under diverse conditions, necessitating solutions for load-bearing, friction, partial corrosion, and precision machining requirements. The stainless steels employed prioritise ‘mechanical properties + corrosion resistance + machinability’, balancing strength, formability, and stability. They serve as critical materials for core components across various equipment types.Mainstream materials encompass three primary series: Within the 300 series austenitic stainless steels, 304 stainless steel offers excellent machinability, being suitable for stamping, welding, and cutting. It is cost-effective and resistant to atmospheric corrosion, making it ideal for housings, flanges, and transmission components in general machinery. 316L stainless steel, containing molybdenum, exhibits superior resistance to pitting corrosion. It is well-suited for contact parts in marine equipment and chemical machinery, as well as components exposed to mildly corrosive media. Within the 400 series ferritic/martensitic stainless steels, 410 martensitic stainless steel can be heat-treated for strengthening, offering high strength and wear resistance for structural components like shafts, gears, and bolts. 430 ferritic stainless steel is cost-effective with excellent oxidation resistance, suitable for non-load-bearing parts such as decorative panels and brackets in construction machinery. 2205 duplex steel combines high strength with corrosion resistance, offering twice the strength of standard stainless steel. It is employed in demanding applications such as high-pressure valves and hydraulic components for construction machinery.These stainless steels fulfil core requirements in mechanical manufacturing: austenitic grades excel in weldability and stampability, accommodating complex structural forming; martensitic grades achieve enhanced hardness through quenching and tempering, meeting wear resistance demands for transmission components; certain grades undergo surface treatments (e.g., passivation, coating) to further boost wear resistance, making them suitable for high-wear parts like gears and bearings.Application scenarios span all industries: flow path components and seals in general machinery (pumps, valves, compressors); structural connectors and hydraulic system components in construction machinery (excavators, cranes); high-precision components in precision equipment (machine tools, instruments); deck machinery and connectors in marine equipment. This effectively extends equipment service life while reducing maintenance costs in outdoor and multi-media environments.