Stainless Steel Flat Bar

Stainless steel flat steel is a rectangular steel with a little pure edge, stainless steel flat steel can be semi-finished steel, there are cold drawn polished stainless steel flat steel and hot rolled acid white sandblasted stainless steel flat steel, stainless steel flat steel can be made of various Composed of stressed components, it can also be used as a connector between components. It is widely used in various building structures and engineering structures, such as beams, bridges, transmission towers, lifting and transportation machinery, ships, industrial furnaces, reaction towers, container shelves and Warehouse shelves, etc.
Stainless steel flat steel is used in construction projects as bridges, house frames, fences, power transmission ships, vehicles, etc. The raw material billet for producing stainless steel flat steel is low-carbon billet, and the finished stainless steel flat steel is in hot-rolled shape, cold-rolled or hot-rolled State delivery, when trading, the side width and side thickness of stainless steel flat steel should be fully filled in the contract and other documents, and other main process items, such as annealing, solid solution, etc.

Manufacturing process
The raw material billet for the production of cold-drawn flat steel is stainless steel square billet, and the finished stainless steel flat steel is delivered in the state of hot-rolled forming, normalizing or hot-rolled pickling (or re-sandblasting), cold-drawn and polished. Both sides are equal in width. Its specifications are expressed in millimeters of side width and side thickness. For example, "303" means an equilateral stainless steel flat steel with a side width of 30 mm and a side thickness of 3 mm. Cold drawn flat steel products are widely used in construction machinery, bridges, house frames, fences, power transmission ships, auto parts, textile machinery, agricultural machinery, elevators, fitness, machine tool components, ladders, bridges and fences, etc.; rich processing experience can provide customers with customized services for special-shaped steel. The stainless steel flat steel can be customized according to different needs of the structure Composed of various stress components, the appearance quality of cold-drawn flat steel requires that the surface quality of stainless steel flat steel is specified in the standard, and it is generally required that there should be no harmful defects in use, such as delamination, scarring, cracks, etc.
Using the converter to smelt flat steel mainly uses molten iron as raw material, which has fewer harmful elements and the quality of the produced flat steel is guaranteed. Due to the high yield and low power consumption, the cost per ton is lower than that of electric furnaces. The molten steel is directly cast into a billet, omitting the billet opening process and reducing the cost. The continuous casting billet has a high sizing rate, which can ensure the sizing rate of flat steel and meet the needs of users.

Stainless steel profiles are widely used, because of their different thicknesses, the prices are also different
Classification by purpose
1. Architectural stainless steel profiles (divided into doors, windows and curtain walls).
2. Radiator stainless steel profile.
3. General industrial stainless steel profiles: mainly used for industrial production and manufacturing, such as automated mechanical equipment, the skeleton of the cover, and the mold opening customized by each company according to their own mechanical equipment requirements, such as assembly line conveyor belts, hoists, glue dispensers, Testing equipment, shelves, etc., are mostly used in the electronic machinery industry and clean rooms.
4. Rail vehicle structure: mainly used in the manufacture of rail vehicle bodies.

The implementation standard of stainless steel flat steel is to regulate the quality, size, chemical composition and other aspects of steel to ensure that it can meet the requirements of different fields. The following are the common implementation standards for stainless steel flat steel:

Chinese standard:
GB/T 908-2019 Dimensions, shape, weight and allowable deviation of forged steel bars
"Forged bars for dimensions,shape,weight and tolerances" is a Chinese national standard. This standard specifies the cross-sectional shape, cross-sectional size, weight, allowable deviation, and length of forged steel bars (round steel, square steel, and flat steel). And allowable deviation, shape, etc. This standard applies to forged round steel with a diameter of 40 mm to 1000 mm, forged square steel with a side length of 40 mm to 1000 mm, and flat steel with a thickness of 20 mm to 800 mm and a width of 40 mm to 1500 mm.

American standard:
ASTM A240/A240M
ASTM A240/A240M is mainly used in the US market, and specifies the chemical composition, mechanical properties, dimensional deviation, and smoothness of ferritic, austenitic, duplex, martensitic, cast and hot-rolled stainless steel plates, coils and strips , hardness and impact properties and other indicators, the standard covers more than 30 types of stainless steel.

Japanese standard:
JIS G 4304-2012 Hot-rolled stainless steel sheets, strips and coils
JIS G 4304-2012 is the Japanese Industrial Standard, which specifies the chemical composition, mechanical properties, dimensional deviation, banding defects, surface quality, hardness and impact properties of hot-rolled stainless steel plates, strips and coils. This standard is mainly applicable to stainless steel shapes.

Some specified dimensions of stainless steel flat bar

Thickness: hot rolling: 2.5mm-200mm; cold rolling: 0.3mm – 6mm
Width: 10mm-700mm
Length: 1000-6000mm

According to international standards, the thickness and width tolerances of stainless steel flat steel should meet the following requirements: