◆ Stainless Steel Bar Grades

◆ Application

Austenitic stainless steel bar grades:

301: It is mainly used for equipment and components that bear high loads in a cold-worked state and wish to reduce equipment weight and not rust, such as railway vehicles, decorative panels, conveyor belts, fasteners, etc.

302: It is mainly used for structural parts and welded parts that do not require high corrosion resistance and strength, such as building exterior decoration materials; it can also be used for non-magnetic parts and parts of cryogenic devices. However, in the sensitized state or after welding, it has a tendency of intergranular corrosion, so it is not suitable for welding structural materials.

303: Most suitable for fast cutting (such as automatic lathe) to make rolls, shafts, bolts, nuts, etc.

304: It is suitable for the manufacture of deep-drawn parts and acid pipelines, containers, structural parts, etc., and can also manufacture non-magnetic and low-temperature equipment and parts.

304L: It is mainly used for corrosion-resistant equipment and components that need to be welded and cannot be solid solution treated after welding.

316: 316 has good resistance to reducing medium and pitting corrosion due to containing molybdenum. In seawater and various other media, the corrosion resistance is better than 304 steel, and it is mainly used for pitting corrosion resistant materials.

316L: The ultra-low carbon steel of 316 steel has good resistance to intergranular corrosion in sensitized state. It is suitable for the manufacture of welded parts and equipment with thick section dimensions, such as corrosion-resistant materials for equipment used in petrochemical, chemical fertilizer, papermaking, printing and dyeing, and atomic energy industries.

316Ti: Suitable for making welded parts.

317: Used to make papermaking, printing and dyeing equipment, petrochemical and organic acid corrosion-resistant equipment, etc.

321: It can be replaced by ultra-low carbon austenitic stainless steel. Except for special use (high temperature or hydrogen corrosion resistance), it is not recommended for general use.

347: It is mainly used in thermal power plants, petrochemical and other fields, such as making containers, pipes, heat exchangers, shafts, etc.; it can also be used as welding materials.

Austenitic-ferritic duplex stainless steel bright bar grades:

2205: It is suitable for structural materials, used to replace 304L and 316L austenitic stainless steel. Used to make oil well pipes, chemical storage tanks, heat exchangers, condensing coolers and other pressure equipment prone to pitting and stress corrosion.

Martensitic stainless steel round bar grades:

410: It is mainly used for impact-loaded parts that require high toughness and are stainless, such as cutting tools, blades, fasteners, hydraulic press valves, pyrolysis anti-sulfur corrosion equipment, etc.; it can also be made to resist weak corrosion media at room temperature equipment and components.

416: The steel with the best cutting performance among stainless steels, used for automatic lathes.

420: It is mainly used in the manufacture of parts subject to high stress loads, such as steam turbine blades, thermal oil pumps, shafts and bushings, impellers, valve plates of hydraulic presses, etc. It can also be used in paper industry, medical equipment, and knives and tableware in the field of daily consumption.

440C: Mainly used to make nozzles, bearings, etc.