Round Stainless-Steel Pipe ASTM A270 A554 SS304 316L 316 310S 440 1.4301 321 904L 201 Square Pipe Inox Ss Seamless Tube

Stainless Steel Pipe
Stainless steel pipe is a kind of hollow long round steel, which is widely used in industrial transmission pipelines and mechanical structural parts such as petroleum, chemical, medical, food, light industry, mechanical instruments, etc.
In addition, when the bending and torsional strength is  the same, the weight is relatively light, so it is also widely used to manufacture mechanical parts and engineering structures. It is also commonly used as furniture and kitchenware.
Stainless steel pipe is a kind of economical cross-section steel. It is an important product in the iron and steel industry. It can be widely used in life decoration and industry. Many people on the market use it to make stair railings, window guards, railings, furniture, etc. There are two common materials, 201 and 304.
It accounts for about 8% to 16% of the total amount of steel, and it has a wide range of applications in the national economy.Because the steel pipe has a hollow section, it is most suitable as a pipeline for liquids, gases and solids. At the same time, compared with round steel of the same weight, the steel pipe has a large section coefficient and high bending and torsion strength, so it has become a variety of machinery and building structures. Important material on the site. Structures and parts made of stainless steel pipes have a larger section modulus than solid parts under the condition of equal weight.
Material Classification
301 ----- Good ductility, used for molding products. It can also be hardened rapidly by mechanical processing. Good weldability. The wear resistance and fatigue strength are better than 304 stainless steel.
302 ----- The corrosion resistance is the same as 304, and the strength is better because the carbon content is relatively high.
303 ----- It is easier to cut than 304 by adding a small amount of sulfur and phosphorus.
309 - better temperature resistance than 304.
316 ------ After 304, the second widely used steel is mainly used in the food industry, pharmaceutical industry and surgical equipment. Molybdenum is added to make it obtain a special corrosion-resistant structure. Because of its better resistance to chloride corrosion than 304 stainless steel pipe, it is also used as "marine steel". SS316 is usually used in nuclear fuel recovery devices. Grade 18/10 stainless steel pipe is also generally suitable for this application level.
Model 321 - except that the addition of titanium reduces the risk of material weld corrosion, other properties are similar to 304.
400 series - ferritic and martensitic stainless steel.
408 - Good heat resistance, weak corrosion resistance, 11% Cr, 8% Ni.
409 - The cheapest model (British and American), usually used as automobile exhaust pipe, is ferritic stainless steel (chrome steel).
410 - martensite (high-strength chromium steel), good wear resistance, poor corrosion resistance.
416 - The addition of sulfur improves the processing performance of the material.
420 - "cutting tool grade" martensitic steel, similar to Brinell high chromium steel, the earliest stainless steel. It is also used for surgical knives, which can be made very bright.
430 - Ferritic stainless steel, used for decoration, such as automobile accessories. Good formability, but poor temperature resistance and corrosion resistance.
440 - High strength cutting tool steel, with slightly higher carbon content, can obtain higher yield strength after proper heat treatment, and its hardness can reach 58HRC, which is among the hardest stainless steels. The most common application example is "razor blade". There are three common models: 440A, 440B, 440C, and 440F (easy to process).
500 series - heat-resistant chromium alloy steel.
600 series - martensitic precipitation hardening stainless steel pipe.

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