Stainless Steel is defined in GB/T20878-2007 as steel with stainless steel and corrosion resistance as its main characteristics, with a chromium content of at least 10.5% and a maximum carbon content of no more than 1.2%. Stainless steel is often divided according to its organizational state: martensitic steel, ferritic steel, austenitic steel, austenitic-ferritic (duplex) stainless steel and precipitation hardened stainless steel. In addition, it can be divided according to its composition: chromium stainless steel, chromium-nickel stainless steel, chromium-manganese-nitrogen stainless steel, etc. There is also special stainless steel for pressure vessels “GB24511_2009_Stainless steel plates and steel strips for pressure-bearing equipment”.
Shandong YutaiSteel (Group) .Mproduces and supplies stainless steel flat plate sheet, stainless steel pipe and stainless steel coil sheet. We have the factory advantage of a complete production line of stainless steel in China, supply 200 series, 300 series and 400 series of market regular grade stocks, and support the customization of surface processes such as mirror, BA, polishing, 2B and hairline.
Product tags
| Grade | 200series/300series/400 series|904L, etc. |
|---|---|
| Thickness | 0.25mm – 4.0mm |
| Width | 10mm – 1,500mm |
| Technology | Hot Rolled/Cold Rolled |
| Standard | ASME, ASTM, EN, BS, GB, DIN, JIS,etc. |
| Surface Finish | No.1/No.2/NO.4（Brushed）2B/BA/Mirror/8K, etc. |
| Optional coating | Laser & Deep drawing PVC. |
| Package | Standard Seaworthy Package |
The Grade Products In The Above Table Are Our Regular Inventory Products. If You Do Not Find The Grade Product You Need, Please CONTACT US NOW To Get A One-To-One Exclusive Quotation Service.
Powered by state-of-the-art facility and technology, Shandong YutaiSteel (Group) operates a totally computerized, end-to-end full automatic production system. This allows us to deliver high-quality and high-performance products fit to the needs of customers.
1. Stainless steel crude steel smelting process
At present, the smelting processes for producing stainless steel in the world are mainly divided into one-step, two-step and three-step methods, as well as new integrated production methods. The one-step smelting method is: molten iron + AOD (argon oxygen refining furnace); the two-step method is: EAF (electric arc furnace) + AOD (argon oxygen refining furnace). The three-step method is: EAF (electric arc furnace) + AOD (argon oxygen refining furnace) + VOD (vacuum refining furnace). In addition to several traditional production processes, the current integrated production process, that is, the production process from molten iron directly to stainless steel, is also adopted by many companies. The production process is: RKEF (rotary kiln electric furnace) + AOD (argon oxygen refining furnace).
2. Stainless steel hot rolling process
The stainless steel hot rolling process uses slabs (mainly continuous casting billets) as raw materials, and after heating, the rough rolling unit and the finishing rolling unit make strip steel. The hot steel strip coming out of the last rolling mill of finishing rolling is cooled to the set temperature by laminar flow, and is rolled into steel coils by the coiler. The surface of the cooled steel coils has oxide scale and appears black, commonly known as “stainless steel black coils” . After annealing and pickling, the oxidized surface is removed, which is called “stainless steel white roll”. Most of the hot-rolled products circulating in the stainless steel market are stainless steel white rolls.
3. Stainless steel cold rolling process
After hot rolling of stainless steel, some hot-rolled stainless steel products are directly used downstream, and some hot-rolled products need to be processed into cold rolling before use.
For stainless steel cold rolling, stainless steel hot-rolled products with a thickness of 3.0-5.5mm are mostly used. After rolling processing by cold rolling equipment, stainless steel cold-rolled products are produced. Currently, there are two main production processes for stainless steel cold rolling: stainless steel single-stand cold rolling and stainless steel multi-stand cold rolling.
4.Annealing and pickling unit
After stainless steel is cold rolled, it needs to go through annealing and pickling units. The annealing of stainless steel after cold rolling is to eliminate work hardening through the recrystallization process to achieve the purpose of softening; the purpose of pickling is to remove the oxide layer formed on the surface of the steel strip during the annealing process, and to passivate the surface of the stainless steel. , improve the corrosion resistance of steel plates.
