Introduction to Duplex Stainless Steel, Precipitation Hardening Steel, Stainless Steel, and Other Series

 　　Stainless steel rods have broad application prospects and are widely used in industries such as hardware kitchenware, shipbuilding, petrochemical, machinery, food, electricity, energy, building decoration, nuclear power, aerospace, military, and more!. Equipment used in seawater, chemical, dye, papermaking, oxalic acid, fertilizer and other production equipment; Food industry, coastal facilities, ropes, CD poles, bolts, nuts.

　　Quality Management ISO9001:2000 Quality Management System Certification, Production License, etc!

　　Stainless steel is used for making welding rods. The nickel and chromium contents of 309, 310, 314, and stainless steel are relatively high, in order to improve the oxidation resistance and creep strength of the steel at high temperatures. However, 30S5 and 310S are variants of 309 and 310 stainless steel, with the only difference being their low carbon content, in order to reduce the amount of carbide precipitated near the weld. 330 stainless steel has particularly high resistance to carburization and thermal shock. 316 and type stainless steel contain aluminum. Therefore, the resistance to spot corrosion in marine and chemical industrial environments is significantly better than 304 stainless steel, among which. Type 316 stainless steel includes variants such as low-carbon stainless steel 316L, high-strength stainless steel 316N containing nitrogen, and free-cutting stainless steel 316F with high sulfur content. 321, 347, and others are made of titanium, respectively.

　　The activity of ions increases with increasing temperature. The concentration and temperature of electrolytes have a direct impact on the current efficiency during processing, and this effect is also different for linear electrolytes and nonlinear electrolytes when the temperature and concentration of electrolytes change. The viscosity of the electrolyte itself changes accordingly, which in turn affects the flow characteristics of the electrolyte. The selected electrolyte concentration and temperature will directly affect the polishing efficiency and processing speed of the electrochemical polishing of stainless steel grinding rod. The effects of electrolyte concentration and temperature on the efficiency of electrochemical treatment are complex. So far, there is not enough experimental research in this area. (3) When the current density is at different polarization intervals, the surface removal of the material is different. In order to ensure the surface smoothness of the stainless steel grinding rod, the material removal method should be controlled as much as possible during the polishing interval.

　　Remark: Customized stainless steel rods of various materials and specifications

　　Introduction to the Material, Application Range, and Quality Management of Stainless Steel Bars

　　Material: 304, 304L, 321, 316, 316L, 310S, 630

　　Common materials include 201, 202, 301, 304, 303, 316, 316L, 304L, 321, 2520, 1Cr13, 2Cr13, 3Cr13, duplex steel, antibacterial steel, and other materials! Etc. The specification is represented by a diameter, such as "50", which means a round steel with a diameter of 50 millimeters. Round steel is divided into three types: hot rolled, forged, and cold drawn. The specifications of hot-rolled round steel are 5.5-250mm.

　　Application scope: Petroleum, electronics, chemical, light textile, food, machinery, construction, nuclear power, aerospace, military and other industries!

　　Quality management: ISO9001:2000 quality management system certification, production license, etc!

　　Production process

　　Stainless steel bars can be divided into three types according to production processes: hot rolling, forging, and cold drawing. The specifications of hot-rolled stainless steel round steel are 5.5-250mm. Among them, small stainless steel round bars of 5.5-25mm are mostly supplied in straight bundles, commonly used as steel bars, bolts, and various mechanical parts; Stainless steel round bars larger than 25mm are mainly used for manufacturing mechanical parts or as seamless steel pipe billets.

　　Executive standards

　　GB/T14975-2002, GB/T14976-2002, GB/T13296-91 for stainless steel bars

　　American standard ASTMA484/A484M, ASTMA213/213A, ASTMA269/269M

　　classification

　　According to composition, it can be divided into Cr system (SUS400), Cr Ni system (SUS300), Cr Mn Ni system (SUS200), and precipitation hardening system (SUS600).

　　200 Series - Chromium Nickel Manganese Austenitic Stainless Steel

　　300 Series - Chromium Nickel Austenitic Stainless Steel

　　The effect of molybdenum on the properties of stainless steel bars, The oxidation effect of molybdenum on austenitic stainless steel is not significant. Therefore, when chromium nickel austenitic stainless steel maintains a single austenite structure and there is no intermetallic precipitation, the addition of molybdenum has little effect on its room temperature mechanical properties. However, with the increase of molybdenum content, the high temperature strength, such as creep resistance, of the steel are greatly improved. Therefore, molybdenum containing stainless steel is often used at high temperatures. However, the addition of molybdenum increases the high-temperature deformation resistance of the steel, and there is often a small amount in the steel δ Ferrite, therefore, the hot workability of molybdenum containing stainless steel is worse than that of non molybdenum containing steel, and the higher the molybdenum content, the worse the hot workability is. In addition, it is easy for molybdenum containing austenitic stainless steel to reach 1 million κ ( σ) Phase precipitation will significantly deteriorate the plasticity and toughness of steel. Therefore, in the manufacturing and application of molybdenum containing austenitic stainless steel production equipment, attention should be paid to preventing the formation of intermetallic phases in the steel.

　　301- Good ductility, used for forming products. It can also be hardened by machine speed. Good weldability. The wear resistance and fatigue strength are better than 304 stainless steel.

　　302- The corrosion resistance is the same as 304, but due to its relatively high carbon content, it has a higher strength.

　　303- By adding a small amount of sulfur and phosphorus to make it easier to machine.

　　304- i.e. 18/8 stainless steel. The GB brand is 06Cr19Ni10.

　　309- Compared to 304, it has better temperature resistance.

　　316- The second widely used steel grade after 304, mainly used in the food industry and equipment, with the addition of molybdenum to make it a special corrosion-resistant structure. Due to its resistance to chloride corrosion compared to 304, it is also used as a "marine steel". SS316 is commonly used in nuclear fuel recovery devices. Grade 18/10 stainless steel usually also meets this application level.

　　Model 321- Other performance similar to 304, except for reducing material weld corrosion due to the addition of titanium element.

　　400 Series - Ferritic and martensite Stainless Steels

　　408- Good heat resistance, weak corrosion resistance, 11% Cr, 8% Ni.

　　409- Cheap model (British and American), commonly used as an automotive exhaust pipe, made of ferritic stainless steel (chromium steel).

　　410 - martensite (high-strength chromium steel), with good wear resistance and poor corrosion resistance.

　　416- Added sulfur to enhance the processing performance of the material.

　　420 - "cutting tool grade" martensite steel, similar to the early stainless steel such as Brinell high chromium steel. It is also used for cutting tools and can be made very shiny.

　　430- Ferritic stainless steel, for decorative purposes, such as in automotive accessories. Good formability, but poor temperature and corrosion resistance.

　　440- High strength cutting tool steel, with slightly higher carbon content, can achieve higher yield strength after appropriate heat treatment, and hardness can reach 58HRC, belonging to the category of hard stainless steel. A common application example is the "razor blade". There are three commonly used models: 440A, 440B, and 440C, as well as 440F (easy to process).

　　500 series - heat-resistant chromium alloy steel.

　　600 series - martensite precipitation hardening stainless steel.

　　630- commonly used precipitation hardening stainless steel model, also known as 17-4; 17%Cr，4%Ni。

　　Under the action of oxidation, corrosion naturally occurs, so we should also pay more attention in practical operation. Of course, everyone should also pay more attention. 2. The stamping ability of stainless steel grinding rods. I don't know how much you know about the stamping ability of stainless steel grinding rods, but when we actually operate stainless steel grinding rods, there are relatively many problems that they may encounter. For example, when we are deep drawing a stainless steel grinding rod, it may have a significant impact on the fluidity and elongation of our material. In addition, we should also look at the changes that may occur in the stainless steel grinding rod. These aspects are still crucial for the use of our stainless steel grinding rods. The above is an introduction to the stamping ability of stainless steel grinding rods.

　　Therefore, the parallelism of the grinding material is good. It is relatively easy for CNC machining. Through the above introduction, I believe you have a general understanding. If you have any questions, you can call to inquire. Our company has complete production facilities. We can process, process, and harden according to the different needs of customers, and do our best to meet the needs of each customer. We welcome customers to negotiate cooperation. Creating a better future together, the installation and use of stainless steel profiles can achieve a certain degree of flame resistance. Stainless steel profiles are now widely used in both industrial and daily life, mainly because their surface has a certain metal glossiness. The application of stainless steel profiles in various industries can improve their aesthetics, and stainless steel profiles can also meet the installation requirements of different fields, Materials can be processed and produced according to installation requirements