September 28, 2022
Generally speaking, stainless steel coil is not easy to rust steel, in fact a part of stainless steel coil, both rust and acid resistance (corrosion resistance). The stainability and corrosion resistance of stainless steel coils are due to the formation of chrome-rich oxide film (passivation film) on its surface. This rust resistance and corrosion resistance are relative. The test shows that the corrosion resistence of stainless steel sheet coils in the atmosphere, water and other weak media and nitric acid and other oxidizing media, its corrosion resistance increases with the increase of chromium content in steel, when the chromium content reaches a certain percentage, the corrosion resistance of steel changes, namely from easy to rust to not easy to rust, from corrosion resistance to corrosion resistance.
Classification according to organizational structure: There are Martensite type, Austenite type, ferrite and duplex stainless steel.
Classification accorfing to main chemical composition: Basically can be divided into chromium stainless steel and chromium nickel stainless steel two systems.
Classification according to usage: There are nitric acid resistant stainless steel, sulfuric acid resistant stainless steel, seawater resistant stainless steel and so on.
Classification according to corrosion resistance types: It can be divided into pitting corrosion resistance stainless steel, stress corrosion resistance stainless steel, intergranular corrosion resistance stainless steel, etc.
Classification according to functional feature: stainless steel coils can be divided into non-magnetic stainless steel, free cutting stainless steel, low temperature stainless steel, high strength stainless steel and so on.
304 is a kind of universal stainless steel coil material grade, which is widely used in the production of equipment and parts requiring good comprehensive performance (corrosion resistance and molding).
301 stainless steel in deformation shows obvious work hardening phenomenon, is used for a variety of occasions requiring higher strength.
302 stainless steel is essentially a variant of 304 stainless steel with higher carbon content, which can obtain higher strength through cold rolling.
302B is a kind of stainless steel with high silicon content, which has high resistance to high temperature oxidation.
303 and 303Se are free cutting stainless steels containing sulfur and selenium, respectively, used in applications where free cutting and high surface finish are primarily required. 303Se stainless steel is also used to make parts that need to be hot upset because it has good thermal workability under these conditions.
304L is a variant of 304 stainless steel with lower carbon content, used in situations where welding is required. The lower carbon content minimizes carbide precipitation in the heat affected zone near the weld, which may lead to intergranular corrosion (welding erosion) of stainless steel in some environments.
304N is a kind of stainless steel containing nitrogen, nitrogen is to improve the strength of steel.
305 and 384 stainless steel contain high nickel, their low work hardening rate, suitable for a variety of applications with high requirements for cold forming.
308 stainless steel for welding rod.
309, 310, 314 and 330 stainless steels have higher nickel and chromium content in order to improve the oxidation resistance and creep strength of the steel at high temperatures. And 30S5 and 310S are 309 and 310 stainless steel variants, the difference is only the lower carbon content, in order to make the carbide precipitated near the weld to minimize. 330 stainless steel has a particularly high resistance to carburization and thermal shock resistance.
Types 316 and 317 stainless steels contain molybdenum and thus have much better pitting resistance than 304 stainless steels in Marine and chemical industrial environments. Among them, 316 type stainless steel varieties including low carbon stainless steel 316L, high strength stainless steel 316N containing nitrogen and high sulfur content of free cutting stainless steel 316F.
321, 347 AND 348 ARE STAINLESS STEELS STABILIZED WITH TITANIUM, NIOBIUM, TANTALUM AND NIOBIUM RESPECTIVELY. They are suitable for welding components at high temperature. 348 is a kind of stainless steel suitable for the nuclear power industry, which has a certain limit on the amount of tantalum and drill.
Theoretical weight calculation formula of stainless steel rod:
Weight (kg)= diameter (mm)* Diameter (mm)* Length (m)*0.00623 stainless steel gravity: ● Chromium stainless steel 7.75 tons /M3 ● Chromium nickel stainless steel 7.93 tons /M3 ● iron 7.87 tons /M3 stainless steel plate theoretical weight calculation formula theoretical weight of steel products weight (kg) = thickness (mm) × width (mm) × length (mm) × density value
Theoretical weight calculation formula of stainless steel belt:
Weight (kg)= Length (m)* Width (m)* Thickness (mm)* Density value
Length (mm) x Width (mm) x Thickness (mm) x Density = Weight (kg)
Theoretical weight calculation formula of stainless steel plate:
Weight (kg)= Thickness (mm)* Width (m)* Length (m)* Density value
Theoretical weight calculation formula of stainless steel pipe:
(Outer diameter - wall thickness)* Wall thickness]*0.02491=kg/ m (weight per m)
Theoretical weight calculation formula of stainless steel pipe:
Diameter (MM) * Diameter (MM) * Length *0.00623=KG/M
