Introduction of Stainless Steel Seamless Tubes
201 stainless steel seamless tube belongs to austenitic stainless steel. 201 stainless steel has excellent acid resistance, alkali resistance, high density, features, and it has no bubbles when being polished and no pinholes. It can be used to produce all kinds of watchcases, watchband bottom covers and more, mainly being used for making decorative tubes, industrial tubes and some shallow drawn products.
202 stainless steel seamless tube belongs to austenitic stainless steel. 202 stainless steel is one of the 200 series stainless steel with chemical composition of iron, manganese, aluminum, sodium, carbon, lime, carbon dioxide, bromine. It also has about 4% nickel, 8% manganese. And this stainless steel is widely used in architectural decoration, public facilities, municipal engineering, highway guardrails, shopping malls, glass handrails and more.
2205 stainless steel seamless tube is stainless steel with a 50/50 ratio of ferritic and austenitic phases, consisting of 21% chromium, 2.5% molybdenum and 4.5% nickel-nitrogen alloy. It has high strength, good toughness and awesome stress corrosion resistance. This type of steel is widely used in the chemical industry, large chemical containers for transport, the gas and oil industry, the paper industry, environmental pollution control equipment and more. What’s more, in the oil and gas industry, duplex stainless steel materials are currently used to lay more than 850 kilometers of transmission pipelines and the vast majority of which are 2205 duplex stainless steel tubes.
304 stainless steel seamless tube belongs to austenitic stainless steel, with good corrosion and heat resistance, low-temperature strength, excellent mechanical properties. And it will never face the problem of hardening when heating. It is also magnetic-free stainless steel. This type of steel tube is widely used for construction materials, medical equipment, automotive parts, ship parts and more.
304J1 stainless steel seamless tube is austenitic stainless steel. Based on 304 stainless steel, 304J1 stainless steel reduces the content of nickel and increased the content of cuprum. It has good forming properties, excellent formability and good surface quality, which is generally used for cutlery, kitchenware, thermos, sinks, pots and pans, decorative purposes and more.
304L stainless steel seamless pipe is austenitic stainless steel. 304L stainless steel, also known as ultra-low carbon stainless steel, is a versatile stainless steel material that can be used for equipment in the chemical, coal and petroleum industries where high resistance to intergranular corrosion is required, as well as for construction materials, heat resistant parts and parts that are difficult to heat treat.
321 stainless steel seamless tube belongs to austenitic stainless steel, which is added to grade 304 stainless steel with metal--titanium, thus having better intergranular corrosion resistance and high-temperature strength. Also, it can effectively control the formation of chromium carbide. Because of its good corrosion resistance in the atmosphere, 321 stainless steel is widely used in petrochemical, power, bridge and automotive industries.
316 stainless steel seamless tube belongs to austenitic stainless steel. 316 stainless steel has good plasticity, toughness, cold changeability and weldability. Besides, due to its low carbon content and the addition of 2%-3% molybdenum element, which effectively improves the corrosion resistance of 316 stainless steel to reducing salts, various inorganic acids, organic acids, alkalis and salts. Without a doubt, 316 stainless steel is mainly suitable for seawater in applicable equipment, chemical, dye, paper, etc.
316L stainless steel seamless tube belongs to austenitic stainless steel. Due to the presence of molybdenum in 316L stainless steel, its total performance is better than 310 stainless steel and 304 stainless steel. Under high-temperature conditions, when the concentration of sulphuric acid is below 15% or above 85%, 316L stainless steel has a wide range of uses. 316L stainless steel also has good resistance to chloride and is therefore commonly used in marine environments.
309S stainless steel seamless tube belongs to austenitic nickel-chromium stainless steel, with excellent corrosion resistance. 309S stainless steel is an easy-to-cut stainless steel containing sulfur, a variant of 309 stainless steel with a lower carbon content, which can withstand repeated heating below 980°C. Moreover, it has high-temperature strength and oxidation resistance, anti-carburization properties, and is widely used in boilers, energy (nuclear power, thermal power, fuel cells), industrial furnaces, incinerators, heating furnaces, chemical and petrochemical industries.
409L stainless steel seamless tubes are austenitic stainless steel, mainly used in the following industries: heat exchangers, catalytic converter systems, home heating systems, fuel filters, agricultural equipment components and power transformer housings. 409L stainless steel is highly resistant to high temperatures and needs fewer costs. In addition, 409L stainless steel is flexible and easy to replace, so it is a new environmentally friendly product. Also, due to excellent corrosion resistance, it is suitable for extending the automotive lifespan and the lightweight of the car and can be used as recyclable environmental protection materials.
410 stainless steel seamless tubes are martensitic stainless steel. 410 stainless steel has a carbon content of about 0.15% and a chromium content of about 13%. 410 stainless steel has good corrosion resistance (but is not suitable for harsh corrosive environments), machinability, hardening after heat treatment, and can generally be used to make edges and valves.
410S stainless steel seamless tube belongs to the martensitic stainless steel, has good toughness, plasticity and cold changeability. 410S stainless steel is a steel grade that improves the corrosion resistance and forming performance of 410 stainless steel. Its anti-rust feature, corrosion resistance and weldability are better than 410 or 420 series of stainless steel. It can be used to make higher toughness and impact load parts, such as automobile turbine blades, structural frame, lining, bolts, nuts, etc.
420J1 stainless steel seamless tube is martensitic stainless steel. 420J1 stainless steel is magnetic, hard after quenching and has good corrosion resistance. And it can be used to make parts subject to higher stresses or general tools, but its toughness and corrosion resistance is slightly lower.
420J2 stainless steel seamless pipe is martensitic stainless steel. 420J2 stainless steel, also known as 3Cr13 steel, has higher strength, hardness and hardenability compared to 1Cr13 and 2Cr13 steel. However, its corrosion resistance and thermal stability below 700°C are lower than that of 1Cr13 and 2Cr13 steels. And, 420J2 stainless steel cold working properties and welding performance are not good, so it should be done immediately after welding heat treatment to prevent cracking. It has a good cutting performance during the annealed state.
430 stainless steel seamless tubes are ferritic stainless steels with excellent resistance to stress corrosion, pitting corrosion and alkali corrosion. 430 stainless steel tubes are renowned for their good corrosion resistance, formability and practical mechanical properties.
444 stainless steel seamless steel is ferritic stainless steel containing approximately 18% chromium and 2% molybdenum and has good resistance to pitting corrosion and crevice corrosion, making it suitable for use in the petrochemical industry, construction, shipbuilding, food processing and hardware. 444 stainless steel is not susceptible to stress corrosion cracking. Annealed stainless steel 444 is ductile and can be formed by using a variety of roll forming or light stretch-bending operations as well as the more common stretching and bending operations.