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301 Stainless Steel Pipe

301 grade stainless steel is a common austenitic stainless steel with good corrosion resistance and high carbon content, and can be cold worked to various temperatures. Among stainless steels, 301 is the most easily strengthened steel by cold deformation. Cold deformation processing can improve the strength and hardness of steel, and retain sufficient plasticity and toughness. In addition, this steel has good rust resistance under atmospheric conditions, but its corrosion resistance in reducing media is poor, and its corrosion resistance in chemical media such as acid, alkali and salt is poor. Therefore, it is not recommended for corrosive environments.

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302 Stainless Steel Pipe

302 stainless steel is a variant of 18% chromium and 8% nickel austenitic stainless steel. This alloy is the most common and frequently used alloy in the stainless steel family. 302 are slightly higher carbon versions of the 304, usually in the form of ribbons and wires. It is a tough, tough grade, has considerable corrosion resistance, is non-magnetic, and cannot be hardened by heat treatment. 302 are typically used in their annealed state and have a high degree of ease of manufacture and formability.

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303 Stainless Steel Pipe

303 grade stainless steel is also called 1.4305 stainless steel, and 303 grade is the easiest to process of all austenitic stainless steels. The machinability properties of the 303 grade are due to the presence of sulfur in the steel elements. Sulfur can improve machining, but it also reduces corrosion resistance and toughness. The corrosion resistance of the 303 type is lower than that of the 304 type, but the toughness is still as excellent as other austenitic grades.

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317L Stainless Steel Pipe

317L is a low-carbon austenitic stainless steel containing molybdenum. More chromium, nickel and molybdenum are added to obtain better corrosion resistance and increase the resistance to sulfurous acid, acetic acid, formic acid, citric acid and tartaric acid. Resistance to chemical attack. Due to its low carbon content, 317L also provides resistance to sensitization during welding, as well as higher creep, rupture stress and high temperature tensile strength. It is non-magnetic in the annealed state, but may become slightly magnetic after welding.

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321 Stainless Steel Pipe

321(UNS S32100) is a titanium stabilized austenitic stainless steel with good general corrosion resistance. It has good intergranular corrosion resistance at a chromium carbide precipitation temperature of 800-1500 °F(427-816°C). The alloy is resistant to oxidation at 1500 °F(816°C) and has higher creep and stress rupture properties than the 304 and 304L alloys. It also has good low temperature toughness.

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330 Stainless Steel Pipe

330 is an austenitic nickel-chromium-iron-silicon alloy with excellent oxidation and carburizing properties up to 2200 °F and high strength. The high nickel and chromium content of the alloy provides excellent oxidation resistance and carburization, and the silicon content further improves the oxidation resistance of the alloy. The ultra-high nickel content of 34 to 37% of the alloy 330 also provides high resistance to chloride stress corrosion cracking and embrittlement due to sigma phase precipitation in most furnace atmospheres. The alloy 330 also has a low coefficient of expansion, excellent ductility and high strength.

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347 Stainless Steel Pipe

347 is a stable austenitic chromium steel, containing niobium, which can eliminate carbide precipitation, thereby eliminating corrosion during the year. 347 is stabilized by the addition of chromium and tantalum, and provides higher creep and stress rupture properties than alloys 304 and 304L, which can also be used for sensitization and exposure to corrosion problems during the year. The addition of niobium also makes the 347 alloy have excellent corrosion resistance, even better than the 321 alloy.

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403 Stainless Steel Pipe

403 stainless steel has excellent mechanical properties, including high hardness, high strength and high wear resistance. It is commonly used in the manufacture of high hardness tools, cutting tools, bearings and valves and other industrial parts, especially in applications requiring corrosion resistance and wear resistance. In addition, 403 stainless steel can also be used in food processing equipment, chemical equipment, medical equipment and other fields to meet the requirements of corrosion resistance and mechanical properties.

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405 Stainless Steel Pipe

The mechanical properties of 405 stainless steels are important in determining their suitability for various applications. This steel has excellent workability and is easy to cut and shape into different shapes. In addition, the material exhibits a good level of strength and hardness, making it wear-resistant and tear-resistant. A remarkable characteristic of 405 stainless steel is its ductility, which refers to its ability to deform under pressure without breaking. This property makes the metal suitable for forming processes such as bending and rolling without cracking or breaking.

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409 Stainless Steel Pipe

409 is a general purpose chromium, titanium stabilized ferritic stainless steel, its main application is automotive exhaust systems. It contains 11% chromium, which is the lowest amount to form a passive surface film, which makes stainless steel corrosion resistant. It combines good high temperature corrosion resistance, medium strength, good formability and overall cost. Compared with carbon steel, 409 has strong corrosion resistance and is used as a substitute for carbon steel in mildly challenging environments. In this environment, its high resistance to corrosion and high temperature oxidation has advantages. It is usually used in applications where appearance is a secondary quality to mechanical properties and corrosion resistance.

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410 Stainless Steel Pipe

410 is a basic general-purpose martensitic stainless steel, used for high-stress parts, with good corrosion resistance and high strength and hardness. The alloy 410 contains at least 11.5 percent chromium, which is just enough to exhibit corrosion resistance in mild atmospheres, vapors, and many mild chemical environments. It is a general-purpose grade, usually provided in a hardened but still processable condition, for applications that require high strength, medium heat resistance and corrosion resistance. After the 410 is hardened, tempered and polished, it shows the greatest corrosion resistance.

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416 Stainless Steel Pipe

416 is a martensitic free-working chromium steel alloy, which is generally considered a first free-working stainless steel. It has the highest machinability of any stainless steel, about 85% of free-machining carbon steel. Martensitic stainless steels are designed to harden by heat treatment and have corrosion resistance. Although the corrosion resistance of 416 alloy and other martensitic stainless steels is not as good as that of austenitic or ferritic stainless steels, it still exhibits good corrosion and oxidation resistance and high strength in hardened and tempered conditions.

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420 Stainless Steel Pipe

420 is a hardenable martensitic stainless steel that contains at least 12% chromium, just enough to provide corrosion resistance. It has good ductility in the annealed condition, but can be hardened to a minimum Rockwell hardness of 50 HRC, which is the highest hardness in the 12% chromium scale. Due to its hardening properties, 420 are not often welded, although this is possible. Martensitic stainless steel is designed for high hardness, and sometimes other properties will be affected to a certain extent. The corrosion resistance is lower than that of ordinary austenite grades, and its effective operating range is limited by its ductility loss at sub-zero temperatures and strength loss due to excessive tempering at high temperatures. The best corrosion resistance is obtained when the metal is hardened and the surface is ground or polished.

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439 Stainless Steel Pipe

439 steel is in the ordinary ferrite material (430) on the basis of reducing the content of C, while adding Ti and other stabilizing elements, so that the steel intergranular corrosion resistance, formability and weldability are improved. Compared with the 304 steel, although the elongation is low (about 30%), but the strength, corrosion resistance, and corrosion resistance is better than 200 series materials.

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440C Stainless Steel Pipe

440C grade stainless steel is a kind of high carbon martensitic stainless steel. High strength, medium corrosion resistance, good hardness and wear resistance. Grade 440C achieves the highest strength, hardness and wear resistance of any stainless steel alloy after heat treatment. Its extremely high carbon content is the reason for these characteristics, which makes the 440C particularly suitable for applications such as ball bearings and valve parts.

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444 Stainless Steel Pipe

444 stainless steel is a ferritic stainless steel, the national standard grade is 00 Cr18Mo2, its elements of ultra-low carbon nitrogen, chromium content of 18% and 2% molybdenum content, strong corrosion resistance. This type of stainless steel is usually stabilized by niobium or titanium, which can prevent intergranular corrosion after welding.

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309/309S Stainless Steel Pipe

309 and 309S are austenitic chromium-nickel stainless steels that are typically used for higher temperature applications. Due to its high chromium and nickel content, 309 and 309S alloys have a high degree of corrosion resistance, excellent oxidation resistance and excellent heat resistance, while providing good strength at room temperature and high temperature. The only significant difference between 309 and 309S is the carbon content. The 309S alloy has less carbon, which minimizes carbide precipitation and improves weldability.

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254SMO Stainless Steel Pipe

254SMO is a stainless steel originally used in seawater and other aggressive chloride environments. This grade includes a very high-end austenitic stainless steel; consisting primarily of 17.5 to 18.5 percent nickel, 19.5 and 20.5 percent chromium, 6 to 6.5 percent molybdenum, and. 18 to. 22 percent nitrogen. In this "super austenitic" chemistry, these specific levels of Cr, Ni, Mo and N give the 31254 impact toughness to resist cracking, pitting and crevice corrosion, and almost twice the strength of 300 series stainless steel.

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kelly@laiyuan-steels.com

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