| Type: | Stainless Steel Pipes |
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| Grade: | 300 Series |
| Certification: | ISO |
| Shape: | Round |
| Technique: | Welded |
| Surface Treatment: | Polished |
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Audited Supplier 304 stainless steel pipe for anti-theft windows, handrails, guardrails
First, the thicker the wall thickness of the product, the more economical and practical it is, and the thinner the wall thickness, its processing cost will rise significantly; secondly, the product's technology determines its limited performance, generally Seamless steel pipe has low precision: uneven wall thickness, low brightness on the inside and outside of the pipe, high cost of sizing, and there are pits and black spots on the inside and outside that are not easy to remove; third, its detection and shaping must be processed offline. Therefore, it embodies its superiority in terms of high-pressure, high-strength, and mechanical structural materials.
Stainless steel seamless pipes are steel pipes that are resistant to weak corrosive media such as air, steam, and water, and chemical corrosive media such as acids, alkalis, and salts. Also known as stainless acid-resistant steel pipe.
The corrosion resistance of stainless steel seamless pipes depends on the alloying elements contained in the steel. Chromium is the basic element for the corrosion resistance of stainless steel. When the chromium content in the steel reaches about 12%, the chromium interacts with the oxygen in the corrosive medium to form a very thin oxide film (self-passivation film) on the surface of the steel. , Which can prevent further corrosion of the steel matrix. In addition to chromium, the commonly used alloying elements of stainless steel seamless pipes include nickel, molybdenum, titanium, niobium, copper, nitrogen, etc., to meet the requirements of various uses for the structure and performance of stainless steel.
Stainless steel seamless pipe is a hollow long round steel, widely used in petroleum, chemical, medical, food, light industry, machinery and instrumentation and other industrial pipelines and mechanical structural parts. In addition, when the bending and torsion strength are the same, the weight is lighter, so it is also widely used in the manufacture of mechanical parts and engineering structures. It is also often used to produce various conventional weapons, barrels, shells, etc.
1.Chemical requirements
| Grade | UNS # | Content % by weight | |||||||
| Carbon | Manganese | Phosphorus | Sulfur | Silicon | Chromium | Nickel | Molybdenum | ||
| TP304 | S30400 | 0.08 | 2 | 0.045 | 0.03 | 1 | 18 - 20 | 8 - 11 | x |
| TP304L | S30403 | 0.035 | 2 | 0.045 | 0.03 | 1 | 18 - 20 | 8 - 13 | x |
| TP316 | S31600 | 0.08 | 2 | 0.045 | 0.03 | 1 | 16 - 18 | 10 - 14 | 2 - 3 |
| TP316L | S31603 | 0.035 | 2 | 0.045 | 0.03 | 1 | 16 - 18 | 10 - 14 | 2 - 3 |
2. There are 45 kinds of hot-rolled (hot-extruded) steel pipes with a diameter of 54-480mm; 36 kinds with a wall thickness of 4.5-45mm. There are 65 kinds of cold drawn (rolled) steel pipes with a diameter of 6~200mm and 39 kinds with a wall thickness of 0.5~21mm.
3. There must be no cracks, folds, cracks, cracks, rolling, delamination and scarring on the inner and outer surfaces of the steel pipe. These defects should be completely removed (except for pipes for mechanical processing). The diameter exceeds the negative deviation. Other minor surface defects that do not exceed the allowable negative deviation may not be removed.
4. Allowable depth of straights. Hot-rolled and hot-extruded steel pipes with a diameter less than or equal to 140mm are not greater than 5% of the nominal wall thickness, and the maximum depth is not greater than 0.5mm; cold drawn (rolled) steel pipes are not greater than 4% of the nominal wall thickness, and the maximum depth is not greater than 0.3 mm.
Shandong Xinchengyuan Import and Export Co., Ltd is a professional steel company engaged in the research, development, production, sale and service. It had five branch companies .Our annual sales nearly one billion, about 280,000 tons steel, It is located in Jinan with the convenient transportation access. In line with the development concept of quality conquer the world, service achievement future.
We dedicate to strict quality control and thoughtful customer service, and our experienced staff members are always available to discuss your requirements and ensure every customer satisfaction. Our main products include PPGI ,galvanized steel , steel plate , round bar, steel pipe ,Stainless steel product ,angle bar, steel pile ,H beam ,I beam, angle, Channel flat steel etc . With double guarantee of service and management system. Main market distributes in North America, South America, Africa, Southeast Asia as well as Oceania.
Xinchengyuan responds positively to the national one belt and one road strategy, and arranged overseas layout in advance to service the countries and customers alongside the route better and higher efficiency. Up to now, we have established long-term and win-win partnership with many large steel manufacturers, such as Baosteel, Laiwu Steel, Rizhao Steel, Handan Iron and Steel, Angang and Maanshan Iron and Steel. We always foucesed on the intergration of reasources , in line with the concept of win win cooperation . Sincerely wish to build a long and regular business with you forever.
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