304 stainless steel plate and Q345 carbon steel plate can be welded. The welding of stainless steel and Q345 belongs to the welding between low carbon steel and austenitic stainless steel in this kind of dissimilar steel welded joint, due to its working conditions have intergranular corrosion and stress corrosion problems, usually choose E309 type welding material, but when the welding joint is in a higher temperature environment (design temperature ≥315℃), In order to prevent the migration of carbon during the working process, welding materials with a high nickel alloy content (such as InCONel 182 electrode, etc.) are usually used.

As a widely used material, stainless steel has many excellent performance characteristics. First of all, the corrosion resistance of stainless steel is very good. Due to its chromium element, the stainless steel surface forms a dense chromium oxide protective film, which effectively prevents the metal from contacting with corrosive media such as air and water, thus significantly extending the service life of the material.

Secondly, stainless steel has good high temperature resistance. Under high temperature environment, stainless steel can still maintain stable performance and is not easy to deform or melt. This makes stainless steel in the industrial field has a wide range of applications, such as the manufacture of stoves, boilers, heat exchangers and other equipment.

In addition, stainless steel also has good strength and hardness. Its high strength and high hardness make the stainless steel perform well when bearing heavy loads and shocks, and it is not easy to break or deformation. Therefore, stainless steel is often used in the production of building structures, auto parts, medical equipment and other fields.

In addition, stainless steel also has good machinability and weldability. It can be cut, stamped, bent and other operations through various processing processes, and is easy to weld with other metal materials, which facilitates the manufacture and maintenance of products.

Finally, stainless steel also has a beautiful and generous appearance. Its smooth surface and silver-white color make it an ideal decorative material, which is widely used in kitchen utensils, home appliances, architectural decoration and other fields.

In summary, stainless steel shows excellent performance characteristics in corrosion resistance, high temperature resistance, strength and hardness, machinability and weldability, as well as aesthetics, making it an indispensable and important material in many fields.

Color fingerprint-free stainless steel plate with easy to clean the surface stains, do not need metal cleaning agents, some chemical agents will make the stainless steel surface black; Moreover, it is not easy to stick handprints, dust, feel delicate, and has super fingerprint resistance and anti-fouling effect.

When the color fingerprint-free stainless steel plate is used, it should also be noted that the transparent film layer without fingerprints can directly protect the metal surface from being easily scratched, because the surface electroplated oil has good film property, high hardness, and is not easy to peel, powder, yellowing, etc.; If the color fingerprint-free stainless steel plate is processed by fingerprint-free technology, the texture of its appearance will be stronger, it will have an oily moistening, feel more soft, and it can better retain its good metal texture.

201L stainless steel is an austenitic chromium-nickel-manganese stainless steel known for its excellent corrosion resistance, high ductility and low carbon content. The composition of 201L stainless steel consists of approximately 17-19% chromium, 4-6% nickel and 1-2% manganese, and a small amount of nitrogen is added to enhance its mechanical properties. Compared to other stainless steel grades, the carbon content is reduced, ensuring improved solderability and resistance to intergranular corrosion. The combination of these elements produces stainless steel alloys that are not only highly resistant to various corrosive environments, including acidic and alkaline conditions, but also exhibit excellent formability, making them ideal for a variety of manufacturing processes. Its properties make 201L stainless steel ideal for applications in industries such as construction, automotive and kitchenware, where durability and oxidation resistance are critical.

202 stainless steel is a popular multifunctional alloy known for its excellent composition and performance characteristics. It is mainly composed of chromium, nickel, manganese and nitrogen, and has excellent corrosion resistance and oxidation resistance, making it ideal for a variety of industrial and household applications. This austenitic stainless steel also has excellent toughness, strength and formability, allowing it to be easily machined into different shapes and structures. In addition, the addition of nitrogen enhances its mechanical properties, making it more durable and stronger than other stainless steel grades. With so many features in combination, 202 stainless steel has excellent performance in different environments, making it a reliable choice for a variety of buildings, kitchenware, automotive parts, and many other uses.

Some of the main advantages of 316 stainless steel:

Heat and cold resistance: 316 stainless steel performs well at temperatures up to 800°C.

Rust and wear resistance: Compared with other stainless steel grades, 316 has excellent rust and wear resistance.

Corrosion resistance: Adding molybdenum to 316 stainless steel can improve its resistance to acid, alkali and chloride pitting.

Easy to form and weld: 316 stainless steel is easy to weld with TIG or MIG welding and does not require post-weld annealing. After annealing, it is non-magnetic. 316 stainless steel can also be easily formed by braking or rolling molding.

Durability: It has a tensile strength of 515 MPa and maintains its corrosion resistance with minimal maintenance.

Hygiene: This grade of stainless steel is ideal for hygienic applications as it is easy to clean and disinfect.

Sustainability: 316 stainless steel is 100% recyclable.

Due to the different use of each product, its processing technology and raw material quality requirements are also different. Generally speaking, stainless steel products are different, its requirements for raw material thickness tolerances are also different, such as class II tableware and thermos cups, etc., thickness tolerances are generally higher, of -3~5%, and a class of tableware thickness tolerances generally require -5%, steel pipe requirements -10%, hotel freezer thickness tolerances are -8%. Dealers' requirements for thickness tolerances are generally between -4% and 6%. At the same time, the different sales of products at home and abroad will also lead to the different requirements of customers on the thickness tolerance of raw materials. Generally, customers of export products have higher thickness tolerance requirements, while domestic enterprises have relatively low thickness tolerance requirements (mostly due to cost considerations), and some customers even require -15%.

DDQ (deep drawing quality) material: refers to the material used for deep drawing (drawing), that is, the soft material that we say, the main characteristics of this material are high elongation (≧53%), low hardness (≦170%), the internal grain grade is between 7.0 and 8.0, and the deep drawing performance is excellent. Many enterprises that produce thermos bottles and POTS, the processing ratio of their products (BLANKING SIZE/ product diameter) is generally relatively high, and their processing ratios reach 3.0, 1.96, 2.13, and 1.98, respectively. SUS304DDQ materials are mainly used for these products that require a higher processing ratio, of course, products with a processing ratio of more than 2.0 generally need to be completed after several stretches. If the extension of raw materials can not be reached, the phenomenon of cracking and pulling through is easy to occur in the processing of deep-drawn products, which affects the qualified rate of finished products, and of course increases the cost of manufacturers;

② General materials: Mainly used for materials other than DDQ purposes, this material is characterized by relatively low elongation (≧45%), relatively high hardness (≦180HB), internal grain size grade between 8.0 and 9.0, compared with DDQ materials, its deep drawing performance is relatively poor, it is mainly used for products that can be obtained without stretching. Like a type of tableware spoon, spoon, fork, electrical appliances, steel pipe use. However, it has an advantage compared with DDQ materials, that is, the BQ property is relatively good, mainly due to its slightly higher hardness.

Stainless steel sheet is a low price material, but customers have very high requirements for its surface quality. Stainless sheet in the production process will inevitably appear a variety of defects, such as scratches, pitting, sand holes, dark lines, creases, pollution, etc., so that its surface quality, such as scratches, creases and other defects are not allowed to appear in advanced materials, and pitting, sand holes this defect in the spoon, spoon, fork, production is also never allowed, because it is difficult to throw it away when polishing. It is necessary to determine the surface quality level according to the degree and frequency of various defects on the surface, so as to determine the product grade.