The main type of stainless steel!

Antibacterial stainless steel

Antibacterial stainless steel, as the name suggests, is the antibacterial effect of stainless steel. The killing rate of antibacterial stainless steel on Escherichia coli and Staphylococcus aureus is more than 99%, and it also has significant killing effect on other bacteria such as candida albicans and cumulus, showing excellent broad spectrum antibacterial and antibacterial durability. The detection of the National Institute for Drug and Biological Products Control showed that the antibacterial stainless steel fully conforms to the national technical standards in terms of toxicity and human safety. In giving stainless steel antibacterial properties at the same time, the material mechanics, corrosion resistance, hot and cold processing, welding and other properties of the original stainless steel.

Precipitation hardened stainless steel

With good formability and good weldability, it can be used as ultra-high strength material in nuclear industry, aviation and aerospace industry.

According to the composition can be divided into Cr series (400 series), Cr-Ni series (300 series), Cr-Mn-Ni (200 series), heat-resistant chromium alloy steel (500 series) and precipitation hardening series (600 series).

200 series: Chrome-Manganese-Nickel

201,202, etc. : Manganese instead of nickel, poor corrosion resistance, widely used as a cheap substitute for 300 series in China

300 series: Chrome-nickel austenitic stainless steel

301: Good ductility, used for molding products. It can also be machined to harden rapidly. Good weldability. The wear resistance and fatigue strength is better than 304 stainless steel.

302: Corrosion resistance is the same as 304, because the carbon content is relatively higher and thus better strength.

303: By adding a small amount of sulfur and phosphorus to make it easier to cut than 304.

304: universal model; 18/8 stainless steel. Products such as: corrosion resistant containers, tableware, furniture, railings, medical equipment. The standard ingredient is 18 % chromium and 8 % nickel. Stainless steel that is not magnetic and cannot be changed by heat treatment. The GB brand is 06Cr19Ni10.

304 L: Same characteristics as 304, but low carbon so more corrosion resistance, easy heat treatment, but poor mechanical suitable for welding and not easy heat treatment products.

304 N: With the same characteristics as 304, is a nitrogenous stainless steel, nitrogen is added to improve the strength of the steel.

309: compared with 304 has better temperature resistance, temperature resistance up to 980℃.

309S: With a large amount of chromium, nickel, so good heat resistance, oxidation resistance, products such as: heat exchanger, boiler components, jet engine.

310: Excellent high temperature oxidation resistance, the highest use temperature 1200℃.

316: The second most widely used steel after 304, mainly used in the food industry, watches and ornaments, pharmaceutical industry and surgical equipment, molybdenum is added to give it a special structure resistant to corrosion. Because of its better resistance to chloride corrosion than 304, it is also used as "Marine steel". SS316 is commonly used in nuclear fuel recovery units. Grade 18/10 stainless steel is also usually suitable for this application level.

316 L: Low carbon so more corrosion resistance, easy heat treatment, products such as: chemical processing equipment, nuclear power generators, refrigerant storage tank.

321: Similar to 304 in other properties except that titanium is added to reduce the risk of corrosion in the material weld.

347: Add stabilizing element niobium, suitable for welding aviation equipment parts and chemical equipment.

400 Series: Ferritic and martensitic stainless steel, manganese free, can replace 304 stainless steel to some extent

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

409: Cheapest model (British or American), usually used as an automobile exhaust pipe. It is ferritic stainless steel (chromium steel).

410: martensite (high strength chromium steel), good wear resistance, poor corrosion resistance.

416: The addition of sulfur improves the processing property of the material.

420: "cutting edge grade" martensitic steel, similar to Brinell high chromium steel, the earliest stainless steel. Also used in surgical knives, can be made very bright.

430: Ferritic stainless steel, for decorative purposes, such as automobile ornaments. Good formability, but poor temperature resistance and corrosion resistance.

440: High strength cutting tool steel, slightly higher carbon content, after appropriate heat treatment can obtain high yield strength, hardness can reach 58HRC, belongs to the hardest stainless steel. The most common example is the "razor blade". There are three common models: 440A, 440B, 440C, and 440F (easy to process).

Series 500: Heat resistant chrome alloy steel.

Series 600: Martensitic precipitated hardened stainless steel.

Stainless steel mesh

Stainless steel net is mainly used for filtering products, also known as stainless steel filter net.

Material: SUS201, 202, 302, 304, 316, 304L, 316L, 321 stainless steel wire, etc.

Braid: plain weave, twill weave, dense weave.

Mesh number: stainless steel mesh specification 1 mesh -635 mesh. Mat weaving can reach 2800 mesh.

Purpose: stainless steel mesh and other wire braided mesh is mainly used for acid and alkali environmental conditions of screening and filtration, petroleum industry for mud net, chemical fiber industry for screen screen, electroplating industry for pickling net, gas, liquid filtration and other media separation.

Net tape

Classification by name: stainless steel mesh belt, conveyor belt, metal conveyor belt, stainless steel conveyor belt, metal mesh belt, metal conveyor belt, stainless steel transmission belt, metal transmission belt, etc.

Classification by use: widely used in the glass industry of annealing furnace net belt, furnace belt and so on. Food processing industry, dehydrated vegetables, frozen food single frozen machine before processing net belt, chain net. Powder metallurgy, metal heat treatment, quenching, sintering, brazing, roasting, bright, black, bearing, carburizing high temperature furnace net belt, baffle-type net belt, coating drying line conveyor net belt, foam nickel reduction production line net belt, cleaning machine, lifting machine, dryer, dryer, curing furnace net belt. Each conveying process chain network, network belt.

According to the material classification: 1cr13 net belt, 201 net belt, 304 net belt, 316 net belt.

Classification by shape: herringbone mesh belt, B mesh belt, diamond mesh belt, horseshoe mesh belt, chain conveyor belt, glasses mesh belt, chain plate mesh belt, ball mesh belt

Expansion of stainless steel products: stainless steel mesh belt, mesh belt, conveyor mesh belt, metal mesh belt, high temperature mesh belt, the Great Wall mesh belt, B mesh belt, stainless steel ornaments, expansion of all products are made of stainless steel wire, stainless steel plate.

magnetism

Austenitic bodies are non-magnetic or weakly magnetic, while martensite and ferrite are magnetic. After cold processing, the structure and structure of austenite will be transformed to martensite, thus increasing the magnetism. Therefore, life said through the magnet adsorption to distinguish the pros and cons of stainless steel, authenticity of the method is one-sided, wrong.

Stainless steel finish grade

Original surface: NO.1 hot rolled surface subjected to heat treatment and pickling treatment. Generally used for cold rolling materials, industrial tank, chemical industrial equipment, thickness from 2.0MM-8.0MM.

Blunt surface: NO.2D cold rolling after heat treatment, pickling, its material is soft, the surface is silver luster, used for deep stamping processing, such as automobile components, water pipes, etc.

Fog surface: NO.2B cold rolling after heat treatment, pickling, and then finish rolling processing to make the surface for moderate brightness. Because the surface is smooth, easy to grind, make the surface more bright, widely used, such as tableware, building materials and so on. With improved mechanical properties of the surface treatment, almost all applications.

Coarse sand NO.3 with No. 100-120 grinding belt grinding out the product. Has a better gloss, with discontinuous coarse grain. Used for interior and exterior decoration materials, electrical products and kitchen equipment, etc.

Fine sand: NO.4 with particle size 150-180 grinding belt grinding product. Better gloss, with discontinuous coarse lines, stripes thinner than NO.3. Used for bath, building inside and outside decorative materials, electrical products, kitchen equipment and food equipment, etc.

#320 Grinding product with No. 320 grinding strip. Better gloss, with discontinuous coarse lines, stripes thinner than NO.4. Used for bath, interior and exterior decoration materials, electrical products, kitchen equipment and food equipment, etc.

HLNO.4 is continuously ground with the appropriate size polishing belt to produce the product of grinding pattern (subdivision 150-320). Mainly used for architectural decoration, elevator, building doors, panels and so on.

Bright surface: BA after cold rolling subjected to bright annealing, and through the smooth product. Excellent surface gloss and high reflectivity. A mirror-like surface. Used in household appliances, mirrors, kitchen equipment, decorative materials, etc.

Application field

In the field of architectural applications, the surface of stainless steel is important for a number of reasons. Corrosion environments require smooth surfaces because smooth surfaces are less prone to scaling. Dirt deposition will cause rust and even corrosion of stainless steel.

In the spacious hall, stainless steel is the most commonly used material for the elevator decoration board. Although the fingerprints on the surface can be erased, they affect the appearance, so it is best to choose the appropriate surface to prevent fingerprints from being left.

Sanitary conditions are important for many industries, such as food processing, catering, brewing and chemicals, where surfaces must be easy to clean on a daily basis, often with chemical cleaners.

Stainless steel is the best material in this respect, in public places, the surface of stainless steel will often be scribbled, however, it is an important feature that they can be cleaned off, which is a significant feature of stainless steel over aluminum. Aluminum surfaces tend to leave marks and are often difficult to remove. Cleaning stainless steel surface should be along the lines of stainless steel cleaning, because some surface processing lines are unidirectional.

Stainless steel is most suitable for hospitals or other areas where sanitary conditions are critical, such as: food processing, catering, brewing and chemical industry, not only because it is easy to clean every day, sometimes also use chemical cleaning agents, but also because it is not easy to breed bacteria. The results show that the performance is the same as that of glass and ceramic.