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Characteristics and uses of various stainless steels

Characteristics and uses of various stainless steels
ModelTypesCharacteristicUse
301(17cr-7ni)Austenitic steelCompared with 304 steel, the content of Cr and Ni is less, the tensile strength and hardness are higher during cold working, non-magnetic, but magnetic after cold working.Train, aircraft, conveyor belt, vehicle, bolt, spring, screen
301L(17Cr-7Ni-0.1N)Austenitic steelOn the basis of grain boundary, the corrosion resistance of steel 301 is improved; The strength deficiency caused by the reduction of C content is compensated by adding N element to ensure the strength of the steel.Railway vehicle frame and exterior decoration materials
304(18Cr-8Ni)Austenitic steelAs a widely used steel, it has good corrosion resistance, heat resistance, low temperature strength and mechanical properties; Stamping, bending and other hot workability are good, and there is no heat treatment hardening phenomenon (if there is no magnetism, use the temperature range of – 196 ℃ ~ 800 ℃).Household products (Class 1 and 2 tableware, cabinets, indoor pipelines, water heaters, boilers, bathtubs), auto parts (windshield wipers, silencers, molded products), medical appliances, building materials, chemistry, food industry, agriculture, ship parts
304L(18Cr-8Ni)Austenitic steelAs a Low-C 304 steel, its corrosion resistance is similar to that of 304 steel in general, but its resistance to grain boundary corrosion is excellent after welding or stress relief; It can also maintain good corrosion resistance without heat treatment, and the service temperature is – 196 ℃ ~ 800 ℃.It is used in the field of building materials and parts with high heat resistance and chemical corrosion resistance.
304Cu(13Cr-7.7Ni-2Cu)Austenitic steelDue to the addition of Cu, it has good formability, especially wire drawing and aging crack resistance, so it can form products with complex shapes; Its corrosion resistance is the same as 304.Thermos bottle, kitchen sink, pot, pot, insulated lunch box, door handle, textile processing machine.
304N1(18Cr-8Ni-N)Austenitic steelOn the basis of adding 304 elements, the thickness of steel is reduced, the content of Mn and S is reduced, and the strength of steel is improved.Components, street lamps, water storage tanks, water pipes
304N2(18Cr-8Ni-N)Austenitic steelCompared with 304, N and Nb are added as high-strength steel for structural members.Components, street lamps, water storage tanks
316(18Cr-12Ni-2.5Mo)Austenitic steelIt has good corrosion resistance under high temperature and atmospheric conditions; Excellent work hardening (non-magnetic).Equipment used in seawater, chemical, dye, papermaking, oxalic acid, fertilizer and other production equipment; Photography, food industry, coastal facilities, ropes, CD rods, bolts, nuts
316L(18Cr-12Ni-2.5Mo)Austenitic steelAs a Low-C series of 316 steel, in addition to having the same characteristics as 316 steel, it has excellent grain boundary corrosion resistance.In the application of 316 steel, products with special requirements for grain boundary corrosion resistance
321(18Cr-9Ni-Ti)Austenitic steelAdding Ti to 304 steel to prevent grain boundary corrosion; It is suitable for use at 430 ℃ ~ 900 ℃.Aircraft, exhaust pipe, boiler drum
409L(11.3Cr-0.17Ti)Iron cable steelDue to the addition of Ti, it has good high temperature corrosion resistance and high temperature strength.Automotive exhaust pipes, heat exchangers, containers and other products that are not heat treated after welding.
410L(13Cr)Iron cable steelOn the basis of 410 steel, the content of C is reduced, and its processability, welding deformation resistance and high temperature oxidation resistance are excellent.Parts for mechanical structure, engine exhaust pipe, boiler combustion chamber, burner.
430(16Cr)Iron cable steelAs a representative steel of ferritic steel, it has low thermal expansion rate and excellent formability and oxidation resistance.Heat resistant appliances, burners, household appliances, class 2 tableware, kitchen sink, external decorative materials, bolts, nuts, CD rods, screens
430J1L(18-Cr0.5Cu-Nb)Iron cable steelIn 430 steel, Cu, Nb and other elements are added; It has good corrosion resistance, formability, weldability and high temperature oxidation resistance.Building exterior decoration materials, auto parts, cold and hot water supply equipment.
436L(18Cr-1Mo-Ti,Nb,Zr)Iron cable steelIt has good heat resistance and abrasion resistance. Because it contains Nb and Zr elements, it has excellent processability and weldability.Washing machine, automobile exhaust pipe, electronic products, 3-layer bottom pot.
410(13Cr)Martensitic steelAs a representative of martensitic steel, although it has high strength, it is not suitable for harsh corrosive environment; It has good workability and is hardened (magnetic) according to the heat treatment surface。Blade, mechanical parts, oil refining unit, bolt, nut, pump rod, class 1 tableware (knife and fork).
420J1(13Cr-0.2C)Martensitic steelAfter quenching, it has high hardness and good corrosion resistance (magnetic).Tableware (knife), turbine blade
420J2(13Cr-0.3C)Martensitic steelAfter quenching, the hardness is higher than that of 420J1 steel (magnetic)。Blade, nozzle, valve, ruler, tableware (scissors, blade).