Stainless steel angle steel is a widely used type of stainless steel profile. It has the characteristics of stable structure, corrosion resistance, strong deformation resistance, and stable chemical properties. Compared with other metal profiles such as galvanized angle steel, this type of angle steel has incomparable advantages.
Stainless steel angle steel generally refers to a long strip of stainless steel with two sides at right angles. According to the length of the strip, it is divided into equilateral stainless steel angle steel and unequal stainless steel angle steel. Equilateral stainless steel angle steel has two sides of equal width.
Stainless steel angle steel can be classified according to material. Common ones include martensitic stainless steel, ferritic stainless steel, duplex stainless steel, austenitic stainless steel, precipitation hardening stainless steel, etc.
Ferritic stainless steel contains 11%-30% chromium and basically does not contain nickel. It is a nickel-saving steel. Its structure is mainly ferrite when in use. Ferritic stainless steel has high strength and low cold working hardening tendency. It has excellent resistance to local corrosion such as chloride stress corrosion, pitting corrosion, and crevice corrosion, but is sensitive to intergranular corrosion and has poor low-temperature toughness.
Traditionally, it is believed that if there is more than 15% ferrite on the austenite matrix, conversely, if there is more than 15% austenite on the ferrite matrix, we can call it austenite + ferrite duplex stainless steel. Duplex stainless steel has the advantages of both austenitic and ferritic steels.
Martensitic stainless steel is a type of steel whose properties can be adjusted by heat treatment, and it has high strength and hardness. Precipitation hardening stainless steel is a steel that uses heat treatment to precipitate carbides in the steel to increase its strength. The above are all common materials used to make stainless steel angles. In addition, the above materials are also widely used to make other forms of profiles, plates, pipes, etc.
The model is the number of centimeters of the side width, such as ∠3#. The model cannot indicate the product information of different edge thickness in the same model. Therefore, when the buyer and seller customize the contract, they still need to fill in the edge width and edge thickness of the stainless steel angle steel, and cannot use the model alone to indicate it.
In addition to indicating stainless steel angle steel products by edge thickness, in the actual transaction process, it is also necessary to order products according to length. To meet the needs of different application scenarios. The delivery length of stainless steel angle steel is divided into fixed length and multiple length. The fixed length selection range of Chinese stainless steel angle steel is 3-9m, 4-12m, 4-19m, and 6-19m according to the different specifications. The length selection range of Japanese stainless steel angle steel is 6-15m. The cross-sectional height of unequal stainless steel angle steel is calculated according to the long side width of unequal stainless steel angle steel.
Stainless steel angle steel is generally required to have no harmful defects in use, such as delamination, scarring, cracks, etc. The surface quality is specifically specified in the standard, and the allowable range of geometric deviation of stainless steel angle steel is also specified in the standard, generally including curvature, side width, side thickness, top angle, theoretical weight, etc., and it is stipulated that stainless steel angle steel shall not have significant torsion.
Stainless steel angle steel is widely used in various building structures and engineering structures, from civil beams, warehouse shelves, equipment rack bases, to industrial bridges, transmission towers, lifting and transportation machinery, and even military ships, industrial furnaces, reaction towers, and container racks. It can be composed of various load-bearing components according to different structural needs, and can also be used as connectors between components.
Compared with angle steel bars of other materials (such as angle irons), stainless steel angle steel is unparalleled in material performance. However, the cost is high, and not all applicable occasions will use stainless steel angle steel for construction.
1. Definition of stainless steel angle iron
Stainless steel angle steel generally refers to a long strip of stainless steel with two sides at right angles. According to the length of the strip, it is divided into equilateral stainless steel angle steel and unequal stainless steel angle steel. Equilateral stainless steel angle steel has two sides of equal width.
2. Material used to manufacture stainless steel angle steel bar
Stainless steel angle steel can be classified according to material. Common ones include martensitic stainless steel, ferritic stainless steel, duplex stainless steel, austenitic stainless steel, precipitation hardening stainless steel, etc.
(1) Austenitic stainless steel
The output and usage of this type of material occupy the mainstream position of products, accounting for 70.1% of the total stainless steel. It is a very important category of stainless steel. According to the alloy ratio, austenitic stainless steel can be divided into two categories: chromium-nickel steel and iron-chromium-manganese steel. The former uses nickel as the austenitizing element and is the main component of austenitic steel. Considering the production cost, the latter is a nickel-saving steel that uses manganese and nitrogen instead of expensive nickel. Austenitic steel has good corrosion resistance and good comprehensive mechanical properties and process properties, but its strength and hardness are relatively weak.
(2) Ferritic stainless steel
Ferritic stainless steel contains 11%-30% chromium and basically does not contain nickel. It is a nickel-saving steel. Its structure is mainly ferrite when in use. Ferritic stainless steel has high strength and low cold working hardening tendency. It has excellent resistance to local corrosion such as chloride stress corrosion, pitting corrosion, and crevice corrosion, but is sensitive to intergranular corrosion and has poor low-temperature toughness.
(3) Duplex stainless steel
Traditionally, it is believed that if there is more than 15% ferrite on the austenite matrix, conversely, if there is more than 15% austenite on the ferrite matrix, we can call it austenite + ferrite duplex stainless steel. Duplex stainless steel has the advantages of both austenitic and ferritic steels.
(4) Martensitic stainless steel
Martensitic stainless steel is a type of steel whose properties can be adjusted by heat treatment, and it has high strength and hardness. Precipitation hardening stainless steel is a steel that uses heat treatment to precipitate carbides in the steel to increase its strength. The above are all common materials used to make stainless steel angles. In addition, the above materials are also widely used to make other forms of profiles, plates, pipes, etc.
3. Common specifications of stainless steel angles
(1) Size representation
When we see such a statement: "∠30x30x3", it means an equilateral stainless steel angle with a side width of 30 mm and a side thickness of 3 mm. This is expressed in millimeters of side width x side width x side thickness.
(2) Model representation
The model is the number of centimeters of the side width, such as ∠3#. The model cannot indicate the product information of different edge thickness in the same model. Therefore, when the buyer and seller customize the contract, they still need to fill in the edge width and edge thickness of the stainless steel angle steel, and cannot use the model alone to indicate it.
4. Delivery length of stainless steel angle steel
In addition to indicating stainless steel angle steel products by edge thickness, in the actual transaction process, it is also necessary to order products according to length. To meet the needs of different application scenarios. The delivery length of stainless steel angle steel is divided into fixed length and multiple length. The fixed length selection range of Chinese stainless steel angle steel is 3-9m, 4-12m, 4-19m, and 6-19m according to the different specifications. The length selection range of Japanese stainless steel angle steel is 6-15m. The cross-sectional height of unequal stainless steel angle steel is calculated according to the long side width of unequal stainless steel angle steel.
5. Appearance quality requirements of stainless steel angle steel
Stainless steel angle steel is generally required to have no harmful defects in use, such as delamination, scarring, cracks, etc. The surface quality is specifically specified in the standard, and the allowable range of geometric deviation of stainless steel angle steel is also specified in the standard, generally including curvature, side width, side thickness, top angle, theoretical weight, etc., and it is stipulated that stainless steel angle steel shall not have significant torsion.
6. Common uses of stainless steel angle steel
Stainless steel angle steel is widely used in various building structures and engineering structures, from civil beams, warehouse shelves, equipment rack bases, to industrial bridges, transmission towers, lifting and transportation machinery, and even military ships, industrial furnaces, reaction towers, and container racks. It can be composed of various load-bearing components according to different structural needs, and can also be used as connectors between components.Compared with angle steel bars of other materials (such as angle irons), stainless steel angle steel is unparalleled in material performance. However, the cost is high, and not all applicable occasions will use stainless steel angle steel for construction.
