Stainless steel pipe is a hollow strip of round steel, which is widely used in petroleum, chemical, medical, food, light industry, mechanical instrumentation and other industrial pipelines and mechanical structural components. In addition, when the bending and torsional strength are the same, the weight is light, so it is also widely used in the manufacture of mechanical parts and engineering structures. Also used as furniture and kitchenware.
|Material ||200, 300, 400 series |
|Size(round pipe) ||9.5, 12.7, 15.9, |
17, 18, 19.1, 20,
21, 22.2, 23, 25.4,
28, 318, 35, 60, 63.5,
73, 76.2, 88.9, 101.6,
114.3, 127, 133, 159,
168, 219 mm
|Size(square pipe) ||10×10,12×12,18×18, |
|Size (oval pipe) ||30×15,80×40 mm |
|Thickness ||0.01-3 mm |
|Length ||6m or according |
to customer’s request
|Outer diameter ||8-219mm |
|Tolerance ||Outer diameter :±0.2mm |
|Process method ||Code drawn, |
annealed with nitrogen protection,
|Finishing ||A: sanded |
B: 400#-600# mirror
C: hairline brushed
D: TIN titanlum
E : HL brushed & mirror
(two kinds of finishing for one pipe)
The stainless steel tube can be classified into a Cr system (400 series), a Cr-Ni system (300 series), a Cr-Mn-Ni (200 series), and a precipitation hardening system (600 series). 200 series - chrome-nickel-manganese austenitic stainless steel, 300 series - chrome-nickel austenitic stainless steel.
301-----extension is good for molding products. It can also be hardened by mechanical processing. Good weldability. Wear resistance and fatigue strength are better than 304 stainless steel.
302-----corrosion resistance is the same as 304, because the carbon content is relatively high and the strength is better.
303-----It is easier to cut than 304 by adding a small amount of sulfur and phosphorus.
304-----that is 18/8 stainless steel. The GB grade is 0Cr18Ni9. 309 - Better temperature resistance than 304.
316-----After 304, the second most widely used steel grade, mainly used in the food industry, the pharmaceutical industry and surgical equipment, added molybdenum to obtain a special structure resistant to corrosion.
321 - Other properties are similar to 304 except that the addition of titanium reduces the risk of corrosion of the material weld.
400 series - ferritic and martensitic stainless steel.
408—Good heat resistance, weak corrosion resistance, 11% Cr, 8% Ni.
409—The cheapest model, usually used as a car exhaust pipe, is a ferritic stainless steel (chrome steel).
410—Martensite (high-strength chrome steel) with good wear resistance and poor corrosion resistance.
416—The addition of sulfur improves the processing properties of the material.
420—“cutting grade” martensitic steel, similar to the earliest stainless steel of Brinell high chromium steel. Also used for surgical knives, it can be done very brightly.
430 - ferritic stainless steel, for decoration, for example for automotive accessories. Good formability, but poor temperature resistance and corrosion resistance.
440—High-strength cutting tool steel with slightly higher carbon content. After proper heat treatment, it can obtain higher yield strength and hardness can reach 58HRC, which is among the hardest stainless steel. The most common application example is the "razor blade." There are three commonly used models: 440A, 440B, 440C, and 440F (easy processing type).
500 series - heat resistant chrome alloy steel.
600 Series - Martensitic precipitation hardened stainless steel tube.
Auto industry:The main use of stainless steel is the exhaust system, which accounts for more than 1/2 of the total amount of automotive stainless steel, 80% of which is ferritic stainless steel.
Petrochemical industry including fertilizer industry:The demand for stainless steel pipes is extremely large. The industry mainly uses stainless steel seamless pipes. The specifications include: 304, 321, 316, 316L, 347, 317L, etc., the outer diameter is around ¢18-¢610, and the wall thickness is 6mm-50mm. Left and right (generally the medium and low pressure conveying pipes with specifications above Φ159mm), the specific application fields are: furnace tubes, material conveying pipes, heat exchanger tubes, etc.
Fluid transport such as water and gas:Stainless steel pipes and water delivery equipment are the most advanced basic water purification materials in the world. They have strong corrosion resistance, and can not be compared with cast iron pipes, carbon steel pipes and plastic pipes.
Equipment manufacturing and repair:Antibacterial stainless steel has the advantages of stainless steel and good antibacterial properties, and the demand in the field of kitchen equipment, work benches and utensils of the food industry, medical equipment, tableware and hanging towel holders in daily life, and brackets of refrigerators are increasing.
We offer different modes of transport depending on the customer's destination:rail transport and ship transport.The Shipping Mark shall consist of:Trade mark,Seller's name,Product name,Applicable standards,Specifications,Package No,Contract No,Heat No,Color,Production date,Weighing method,Net weight,Gross Weight,Consignee and Protection symbols,etc.