OEM customized, Cut by drawings
EMERSONMETAL
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Tianjin Emerson Metal Steel Products Co.,ltd is a factory，we have been making metal parts for more than 10 years, we can make different types of sheet metal fabrication parts, laser cutting part, machining part, cnc part, cnc machining part, metal part, sheet metal part, laser cutting metal part, stainless steel part, stainless steel metal part, cnc metal part.
We can make all fabrication parts based on the drawings, carbon steel, alloy steel, stainless steel, galvanized, aluminum, copper these all materials.
Stainless steel can be divided into the below types:
Stainless steel is often classified according to its organizational state as martensitic steel, ferritic steel, austenitic steel, etc. In addition, it can be divided into chromium stainless steel, chromium nickel stainless steel, and chromium manganese nitrogen stainless steel according to their composition.
1. Ferritic stainless steel: containing 12% to 30% chromium. Its corrosion resistance, toughness, and weldability improve with the increase of chromium content, and its resistance to chloride stress corrosion is superior to other types of stainless steel. There are Cr17, Cr17Mo2Ti, Cr25, Cr25Mo3Ti, Cr28, etc. belonging to this category. Ferritic stainless steel has good corrosion resistance and oxidation resistance due to its high chromium content, but its mechanical and process properties are poor. It is mostly used in acid resistant structures with low stress and as an oxidation resistant steel. This type of steel can resist corrosion from atmospheric, nitric acid, and saltwater solutions, and has good high-temperature oxidation resistance and low thermal expansion coefficient. It is used in nitric acid and food factory equipment, and can also be used to make parts that work at high temperatures, such as gas turbine parts.
2. Austenitic stainless steel: contains more than 18% chromium, approximately 8% nickel, and small amounts of molybdenum, titanium, nitrogen, and other elements. Good comprehensive performance and can withstand corrosion from various media. The commonly used grades of austenitic stainless steel include 1Cr18Ni9, 0Cr19Ni9, etc. The wC of 0Cr19Ni9 steel is less than 0.08%, and the steel grade is marked as "0". This type of steel contains a large amount of Ni and Cr, which makes the steel in an austenitic state at room temperature. This type of steel has good plasticity, toughness, weldability, and corrosion resistance. It has good corrosion resistance in both oxidizing and reducing media and is used to make acid resistant equipment, such as corrosion-resistant containers and equipment linings, conveying pipelines, and nitric acid resistant equipment parts. Austenitic stainless steel is generally treated with solid solution, which involves heating the steel to 1050-1150 ℃ and then cooling it with water to obtain a single-phase austenitic structure.
3. Austenitic ferritic duplex stainless steel: It combines the advantages of both austenitic and ferritic stainless steels and has superplasticity. Stainless steel with austenite and ferrite structures each accounting for about half. In the case of low C content, the Cr content is between 18% and 28%, and the Ni content is between 3% and 10%. Some steels also contain alloying elements such as Mo, Cu, Si, Nb, Ti, N, etc. This type of steel combines the characteristics of austenitic and ferritic stainless steel. Compared with ferritic stainless steel, it has higher plasticity and toughness, no room temperature brittleness, significantly improved intergranular corrosion resistance and welding performance. At the same time, it maintains the 475 ℃ brittleness and high thermal conductivity of ferritic stainless steel, and has characteristics such as superplasticity. Compared with austenitic stainless steel, it has higher strength and significantly improved resistance to intergranular corrosion and chloride stress corrosion. Dual phase stainless steel has excellent resistance to pitting corrosion and is also a nickel saving stainless steel.
4. Martensitic stainless steel: High strength, but poor plasticity and weldability. Commonly used grades of martensitic stainless steel include 1Cr13, 3Cr13, etc. Due to their high carbon content, they have high strength, hardness, and wear resistance, but slightly poor corrosion resistance. They are used for parts with high mechanical performance requirements but general corrosion resistance requirements, such as springs, turbine blades, hydraulic press valves, etc. This type of steel is used after quenching and tempering treatment.
Stainless steel function
Stainless steel does not produce corrosion, pitting, rusting, or wear. Stainless steel is still one of the strongest building metal materials. Due to its excellent corrosion resistance, stainless steel can permanently maintain the integrity of structural components in engineering design. Chromium containing stainless steel combines mechanical strength and high ductility, making it easy to manufacture components and meet the needs of architects and structural designers.
409L Stainless Steel chemical composition and technical property is as below:
Standard | C max% | Si max | Mn max | P max | S max | Cr | Ni max | Ti | tensile strength（MPa） | yield strength（MPa） | Elongation% |
409L | 0.03 | 1 | 1 | 0.04 | 0.03 | 10.5～11.7 | 0.6 | 6×C～0.75 | ≥415 | ≥275 | ≥20 |
