1. Definition and characteristics of stainless steel round steel
Stainless steel round bar refers to a long material with a uniform circular cross section, generally about four meters long, which can be divided into smooth round and black bar. The smooth round surface is smooth and is processed by quasi-rolling; the black bar surface is black and rough and is directly hot-rolled.
Stainless steel round bar has many excellent properties. First, its oxidation resistance is outstanding. For example, 310S stainless steel round bar has much better creep strength due to the higher percentage of chromium and nickel, can continue to operate at high temperatures, and has good high temperature resistance. Secondly, it has strong corrosion resistance. For example, 316L stainless steel round bar has excellent corrosion resistance, especially pitting resistance, due to the addition of Mo, and the appearance of cold-rolled products has good gloss; after adding Mo to 316 stainless steel round bar, the corrosion resistance, atmospheric corrosion resistance and high temperature strength are particularly good, and it can be used under harsh conditions. In addition, stainless steel round bar has good mechanical properties, such as 304 stainless steel round bar has good corrosion resistance, heat resistance, low temperature strength and mechanical properties, and is corrosion-resistant in the atmosphere. At the same time, stainless steel round bar has good hygienic properties and is widely used in the fields of food industry and surgical equipment. In addition, stainless steel round bars are also aesthetically pleasing, with a smooth surface quality. They can be processed into industrial surfaces, brushed surfaces, bright surfaces and can be polished again according to different needs.
2. Uses of stainless steel round steel
2.1 Wide range of application fields
Stainless steel round bars have a broad application prospect and play an important role in many fields. In the field of shipbuilding, its corrosion resistance and high temperature resistance make it an ideal material choice for the manufacture of hull structures and ship equipment. In the petrochemical industry, stainless steel round bars can withstand the erosion of various corrosive chemicals and are widely used in the construction of chemical equipment and pipelines.In the food industry, stainless steel round bars are used in food processing machinery, containers, and pipelines due to their good hygiene and corrosion resistance. The medical field also has extremely high requirements for hygiene. Surgical instruments and medical equipment made of stainless steel round bars meet strict hygiene standards.
In terms of building decoration, stainless steel round bars can be used to make the structural skeleton of buildings, various decorative parts, handrails, doors and windows, etc. Its high surface finish and good corrosion resistance can add a sense of luxury and modernity to the building. In addition, in the field of hardware kitchenware, kitchenware made of stainless steel round bars is durable and beautiful. In terms of production equipment, such as seawater utilization equipment, chemicals, dyes, papermaking, oxalic acid, fertilizers and other production equipment, stainless steel round bars are also widely used. Its corrosion resistance can ensure the long-term and stable operation of equipment in harsh environments.
3. Material classification of stainless steel round steel
3.1 Introduction to common materials
301 Stainless steel round bar: Good ductility, widely used in formed products. It can also be hardened by machine speed, has good weldability, and has better wear resistance and fatigue strength than 304 stainless steel.
304 stainless steel round bar: It is the most widely used chromium-nickel stainless steel with good corrosion resistance, heat resistance, low temperature strength and mechanical properties. It is corrosion-resistant in the atmosphere. If it is an industrial atmosphere or a heavily polluted area, it needs to be cleaned in time to avoid corrosion.
303 stainless steel round bar: It is easier to cut than 304 by adding a small amount of sulfur and phosphorus, and its other properties are similar to 304.
316 stainless steel round bar: After 304, it is the second most widely used steel type, mainly used in the food industry and surgical equipment. Because of the addition of Mo, its corrosion resistance, atmospheric corrosion resistance and high temperature strength are particularly good, and it can be used under harsh conditions; excellent work hardening (non-magnetic).
316L stainless steel round bar: The cold-rolled product has a good glossy appearance and is beautiful; due to the addition of Mo, it has excellent corrosion resistance, especially pitting resistance; excellent high-temperature strength; excellent work hardening (weak magnetism after processing); non-magnetic in solid solution state.
304L stainless steel round bar: It is a variant of 304 stainless steel with a lower carbon content and is used in occasions where welding is required. The lower carbon content minimizes the precipitation of carbides in the heat-affected zone near the weld, and the precipitation of carbides may cause intergranular corrosion (welding erosion) of stainless steel in certain environments.
321 stainless steel round bar: Ti is added to 304 steel to prevent intergranular corrosion, and is suitable for use at temperatures of 430℃ - 900℃. Except that the risk of rusting of the material weld is reduced by the addition of titanium, other properties are similar to 304.
2520 stainless steel round bar: It has good high temperature resistance and oxidation resistance, and can work stably for a long time in high temperature environments.
201 stainless steel round bar: It is a chromium-nickel-manganese austenitic stainless steel with low magnetism and low cost. It is often used in situations where corrosion resistance is not particularly high but strong hardness and strength are required.
2202 stainless steel round bar: It is a chromium-nickel-manganese austenitic stainless steel with better performance than 201 stainless steel.
3.2 Application differences of different materials
In the oil industry, 316L and 316 stainless steel round bars are widely used in the construction of petrochemical equipment and pipelines due to their good corrosion resistance and high temperature resistance. In the electronics industry, 304 and 304L stainless steel round bars are often used in the housing and internal structural parts of electronic equipment due to their good processing performance and corrosion resistance. In the chemical industry, stainless steel round bars of various materials are used, and the appropriate material is selected according to different chemicals and working environments. For example, for highly corrosive chemicals, 316L and 316 stainless steel round bars are more suitable; while for general chemical production equipment, 304 stainless steel round bars can meet the requirements.
In the pharmaceutical industry, the hygiene requirements are extremely high. 316L and 304L stainless steel round bars are used to make surgical instruments, medical equipment, etc. due to their good corrosion resistance and hygiene performance. In the food industry, 304 and 316 stainless steel round bars are commonly used materials, which can meet the hygiene requirements and corrosion resistance requirements in the food processing process.
In the machinery industry, stainless steel round bars of different materials are selected according to the specific requirements of mechanical parts. For example, for parts that require high strength and wear resistance, you can choose 420 stainless steel round bars; for parts that require good processing performance, you can choose 303 stainless steel round bars.
In the construction industry, 304 and 316 stainless steel round bars are often used for decorative parts and structural frames of buildings. Their corrosion resistance and aesthetics can add value to the building. In some special construction environments, such as seaside or chlorine-containing environments, the corrosion resistance of 316L stainless steel round bars is more prominent.
Post time: Oct-31-2024