310S（2520）、321、2205、2507、660 Special steel series

To meet the individual needs of different users

Screw world special steel series products

310S(2520),321,2205,2507,660

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Compared with ordinary steel
Special steel has higher strength and toughness
With special organization and properties
To meet the high-end field and harsh conditions
Demand for high-end precision special stainless steel fasteners

Material in stock, support platform customized orders，Quick delivery

310S(2520) Series

310S contains high chromium and nickel, has good oxidation resistance, corrosion resistance, acid and alkali resistance, high temperature resistance, can continue to operate at high temperatures, can withstand high temperatures of more than 1150 ℃, high strength and creep strength, very suitable for use in high-temperature environments.

Application areas: petroleum refining device, high temperature furnace guts, engine guide vanes, cremator, exhaust pipe, thermal power plants, microwave ovens and other equipment.

321 Series

321 stainless steel is titanium stabilized austenitic stainless steel, adding titanium to improve intergranular corrosion resistance, and has good high-temperature mechanical properties, mainly used in high temperature or hydrogen corrosion resistance and other special occasions.

Application areas: petroleum refining equipment, high-temperature furnace guts, engine guide vanes, cremation furnaces, exhaust pipes, thermal power plants, microwave ovens and other equipment.

2205 Series

2205 is a nitrogen-added duplex stainless steel with a yield strength of 400-550MPa, twice that of ordinary austenitic stainless steel. Under severe environmental conditions, its resistance to pitting corrosion, crevice corrosion, stress corrosion and corrosion fatigue performance is significantly better than ordinary austenitic stainless steel, comparable to high-alloyed austenitic stainless steel.

Application areas: neutral chloride environment, oil refining industry, petrochemical and chemical industry, chemical industry with transmission pipeline, oil and gas industry, pulp and paper industry, fertilizer industry, urea industry, phosphate fertilizer industry, seawater environment, energy and environmental protection industry, light industry and food industry, food and pharmaceutical industry equipment, high-strength structural components, submarine pipelines, desulfurization of the flue gas machine, desalination equipment for osmosis and desalination, and Sulfuric acid plant, marine engineering fasteners, etc.

2507 Series

2507 duplex stainless steel is in the second generation of duplex stainless steel 2205 on the basis of the development of its corrosion resistance and strength are better than 2205, higher chromium and molybdenum content so that its organic acids such as formic acid, acetic acid, etc. has a strong resistance to corrosion as a whole, on the inorganic acids, especially those that contain chlorinated inorganic acids and also has a strong corrosion resistance.

Application areas: oil and gas industry, pulp and paper industry, seawater desalination, flue gas purification, heat exchangers, piping systems for chemical tankers, seawater systems, etc.

660 Series

660 is a precipitation hardenable high temperature alloy with high mechanical properties, the alloy maintains good strength and oxidation resistance at a temperature of 700 ℃, and at the same time has a high temperature strength superior to austenitic stainless steel, belongs to precipitation precipitation hardening heat-resistant stainless steel.

Application areas: petrochemical, railway and nuclear power turbine discs and screws and bolts in the fastener industry, etc.; used in the working environment below 700 degrees Celsius, requiring high strength and excellent corrosion resistance of parts and equipment, such as turbine rotors, blades, skeletons, combustion chamber components and bolts.

Bolt specifications: M2.5-M36

Nut stock specification: M2-M30