Stainless steel strips are the extension products of ultra-thin stainless steel plates, usually long and narrow stainless steel strips are manufactured to meet the demands of various industrial and mechanical areas.
Stainless steel strip is also called stainless steel strip coil. The maximum width of its size shall not exceed 1220mm, but the length of coil is not limited.
According to the processing method, the stainless steel strips can be divided into cold-rolled stainless steel strips and hot-rolled stainless steel strips.
Stainless steel strips have excellent strength, precision surface finish, and are widely used in many industries such as aerospace, petrochemicals, automobiles, textiles, electronics, home appliances, computers, and precision parts processing.
What Is Cold-Rolled Stainless Steel Strip?
Stainless steel strip coil is rolled by cold rolling mill at room temperature.
The conventional thickness is between 0.1mm and 3mm, and the width is between 100mm and 2000mm.
Cold rolled stainless steel strip has many advantages such as smooth and flat surface, high accuracy, good mechanical properties, and can be rolled or processed into coated steel plates.
The sequence of the production process is pickling, normal temperature rolling, process lubrication, annealing, leveling, precision cutting, and packaging.
What Is Hot-Rolled Stainless Steel Strip?
Hot rolled stainless steel strip is a strip with a thickness of 1.80mm to 6.00mm and a width of 50mm to 1200mm, which is produced by the hot rolling mill.
Hot rolled stainless steel strip has many advantages such as low hardness, easy processing and good extensibility.
Its production process is pickling, high temperature rolling, process lubrication, annealing, smoothing, fine cutting, and packaging.
Differences Between Cold-Rolled Stainless Steel Strip And Hot-Rolled Stainless Steel Strip
First, the yield strength of cold-rolled stainless steel strips are better than hot ones, but and the malleability and toughness of hot-rolled stainless steel strips are better.
Secondly, the thickness of cold-rolled stainless steel strip is ultra-thin, while the thickness of hot-rolled stainless steel strip is a bit thick.
Thirdly, for the surface finish quality, appearance and dimensional accuracy of cold-rolled stainless steel strips are better than those of hot-rolled stainless steel strips.
What Are Stainless Steel Strips Grades?
Common use stainless steel strips grades are often represented by digital symbols.
There are 200 series, 300 series, and 400 series.
They are expressed in the United States, such as 201, 202, 304, 316, 410, 420, 430, etc.
Chinese stainless steel grades are It is indicated by element symbols plus numbers, such as 1Cr18Ni9Ti, 0Cr18Ni9, 00Cr19Ni10, 1Cr17, 3Cr13, 1Cr17Ni7, etc.
The numbers indicate the corresponding element content.
The stainless steel strips can be divided into normal austenitic grade, ferritic grade, martensitic grade, duplex grade, precipitation hardening grade and super austenitic grade.
Chromium-nickel-manganese austenitic stainless steel
Chromium-nickel austenitic stainless steel
Grade 201 stainless steel strip is a lower-cost alternative to the conventional Cr-Ni austenitic stainless steels, such as 304 strips.
202 stainless steel strip is one of the 200 series stainless steel strips, and China standard grade is 1Cr18Mn8Ni5N.
Good extension ability, used for mould products. It can also be hardened at machine speed. Good weldability. Abrasion resistance and fatigue strength are better than 304 stainless steel strip.
304 grade is a common material in stainless steel area, with a density of 7.93 g/cm³, which is also called 18/8 stainless steel in the industry. GB standard is 0Cr18Ni9.
304 stainless steel strip has good weldability. These strips products can be used for vessel parts, stainless steel welding pipes, stainless steel flexible hose and corrugated pipe, etc.
It is a variant of 304 stainless steel with lower carbon content, 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 stainless steel to produce intergranular corrosion (welding erosion) in certain environments.
309S And 310S
Nickel and chromium content are relatively high, in order to improve the oxidation resistance and creep strength of steel at high temperatures.
309S stainless steel strip has high chromium and low nickel content, It can be utilized in sulfur containing atmospheres up to 1000 degree.
310S stainless steel strip is austenitic chromium-nickel stainless steel with good oxidation resistance and resistance, corrosion and high temperature resistance.
Grade 316Ti stainless steel strip contains a small amount of titanium content. Titanium content is typically only around 0.2% to 0.7%.
The titanium atoms stabilise the structure of the grade 316 material at temperatures over 800 degree.
316L And 317L
Contains aluminum, so the resistance to pitting corrosion in marine and chemical industrial environments is much better than 304 stainless steel.
316L stainless steel strip is almost identical to 316 grade strip.
316L stainless steel strip has lower carbon content imparts even better corrosion resistance than 316.
In addition, compared with conventional stainless steel strip, 317L stainless steel strip has higher ductility, stress corrosion resistance, compressive strength and high temperature resistance.
321 And 347
These grades stainless steel stabilized with titanium, niobium plus tantalum, and niobium respectively. They are suitable for welding components used at high temperatures.
321 austenitic stainless steel strip has good corrosion resistance in the atmosphere and is widely used in petrochemical, electric power, bridge and automobile industries.
347 stainless steel strip is one of stabilized stainless steel strips which offers as its main feature an excellent resistance to intergranular corrosion following exposure to temperatures in the chromium carbide precipitation up to 800 degree.
Ferritic and martensitic stainless steel
The cheapest model (British and American), usually used as car exhaust pipe, is a ferritic stainless steel (chrome steel).
Martensite (high-strength chromium steel), good wear resistance, poor corrosion resistance.
420J2, is is also called 3Cr13 steel, one kind of martensitic stainless steel, used after quenching and tempering.
Compared with 1Cr13 and 2Cr13 steel, it has higher strength, hardness and hardenability, but its corrosion resistance and thermal stability below 700℃ are lower than that of 1Cr13 and 2Cr13 steel.
Cold workability and welding performance are not good, heat treatment should be done immediately after welding to prevent cracking.
It has better cutting performance in the annealed state.
Ferritic stainless steel, for decoration, such as car accessories.
Good formability, but poor temperature resistance and corrosion resistance.
High-strength cutting tool steel with slightly higher carbon content.
After proper heat treatment, higher yield strength can be obtained.
The hardness can reach to 58HRC, which is one of the most hardest stainless steel. The most common application example is “razor blades”.
There are three commonly used models: 440A, 440B, 440C, and 440F (easy processing type).
2205 stainless steel strip is a duplex stainless steel strip composed of 22% chromium, 2.5% molybdenum and 4.5% nickel-nitrogen alloy.
The yield strength of duplex 2205 stainless steel strip is more than twice that of normal austenitic stainless steel strip.
2507 is a ferritic-austenitic (duplex) stainless steel, which has excellent resistance to pitting corrosion, crevice corrosion and uniform corrosion.
904L stainless steel strip is a low-carbon, high-nickel, molybdenum super austenitic stainless steel.
It has good activation-passivation transformation ability and excellent corrosion resistance.
It has good corrosion resistance in non-oxidizing acids, good pitting corrosion resistance in neutral chloride-containing application.
Of course, there are many other grades stainless steel. More information, you can click stainless steel strips link for checking.
What Is Stainless Steel Strips Application?
Precision stainless steel strips are widely used in various sectors of the national economy such as industry and civil due to its high strength, corrosion resistance, oxidation resistance, processability and service performance, wear resistance and good appearance.
With the advancement of science and technology, stainless steel strips application fields are still expanding and extending, and it has spread all over major industries such as aerospace, petrochemicals, automobiles, textiles, electronics, home appliances, computers, and precision machining, etc. The demand for products also grow rapidly.
Generally speaking, the application industry can be divided into the following two categories:
- Precision stainless steel strips products for high-end industries: aerospace industry; petrochemical industry; precision electronics industry; medical equipment; precision instrument.
- Precision stainless steel strips products for mid-range industries: electronic information industry; household appliances industry; kitchen and tableware; building decoration industry; hardware industry.
How To Manufacture Stainless Steel Strips?
Our high quality stainless steel strip is available in total annealed condition as well as a variety of hardness choice.
We welcome every order of yours that you need in small and large quantities.
Our factory is well-equipped with precision slitting machines and advanced 20-High SendZimir Mill that are able to mass produce your strips.
Our staff and precision machines are well-equipped with all the latest technology to give you the finest work and make sure you get the good-quality stainless steel strips within the planned deadlines.
Want to know how to produce 1 roll stainless steel strip in our factory?
What Is Stainless Steel Strips Surface Finish?
Stainless steel has become a widely used metal material for its excellent corrosion resistance, good mechanical properties and processing properties.
Through different processing methods of cold rolling and surface reprocessing after cold rolling, the surface finish of stainless steel can have different types.
The surface processing of stainless steel strips have NO.1, 2B, No. 4, HL, No. 6, No. 8, BA, TR hard, Rerolled bright 2H, polishing bright and other surface finishes, etc.
- NO.1: No. 1 surface refers to the surface obtained by heat treatment and pickling after hot rolling of the stainless steel strip. It is to remove the black oxide scale produced during hot rolling and heat treatment by pickling or similar treatment methods. This is No. 1 surface processing. The No.1 surface is silvery white and matt. Mainly used in heat-resistant and corrosion-resistant industries that do not require surface gloss, such as alcohol industry, chemical industry and large containers.
- 2B: The surface of 2B is different from the 2D surface in that it is smoothed with a smooth roller, so it is brighter than the 2D surface. The surface roughness Ra value measured by the instrument is 0.1～0.5μm, which is the most common processing type. This kind of stainless steel strip surface is the most versatile, suitable for general purposes, which is widely used in the chemical, paper, petroleum, medical and other industries, and can also be used as a building curtain wall.
- TR Hard Finish: TR stainless steel is also called hard steel. Its representative steel grades are 304 and 301, they are used for products that require high strength and hardness, such as railway vehicles, conveyor belts, springs and gaskets. The principle is to use the work hardening characteristics of austenitic stainless steel to increase the strength and hardness of the steel plate by cold working methods such as rolling. The hard material uses a few percent to several tens of percent of the mild rolling to replace the mild flatness of the 2B base surface, and no annealing is carried out after rolling. Therefore, the TR hard surface of the hard material is the rolled after cold rolling surface.
- Rerolled Bright 2H: After the rolling process. the stainless steel strips will be processed bright annealing. The strip can be fast cooled by the the continuous annealing line. The traveling speed of the stainless steel strip on the line is around 60m~80m/min. After this step, the surface finish will be 2H rerolled bright.
- No.4: The surface of No. 4 is a fine polished surface finish that is brighter than the surface of No. 3. It is also obtained by polishing the stainless steel cold-rolled stainless steel plate with 2 D or 2 B surface as the base and polishing with abrasive belt with a grain size of 150-180# Machined surface. The surface roughness Ra value measured by the instrument is 0.2～1.5μm. NO.4 surface is widely used in restaurant and kitchen equipment, medical equipment, architectural decoration, containers, etc.
- HL: HL surface is commonly called hairline finish. Japanese JIS standard stipulates that 150-240# abrasive belt is used to polish the continuous hairline-like abrasive surface obtained. In China’s GB3280 standard, the regulations are rather vague. HL surface finish is mostly used for building decoration such as elevators, escalators, and facades.
- No.6: The surface of No. 6 is based on the surface of No. 4 and is further polished with a Tampico brush or abrasive material with a particle size of W63 specified by GB2477 standard. This surface has a good metallic luster and soft performance. The reflection is weak and does not reflect the image. Due to this good property, it is very suitable for making building curtain walls and building fringe decorations, and also widely used as kitchen utensils.
- BA: BA is the surface obtained by bright heat treatment after cold rolling. Bright heat treatment is annealing under a protective atmosphere that guarantees that the surface is not oxidized to preserve the gloss of the cold-rolled surface, and then use a high-precision smoothing roll for light leveling to improve the surface brightness. This surface is close to a mirror finish, and the surface roughness Ra value measured by the instrument is 0.05-0.1μm. BA surface has a wide range of uses and can be used as kitchen utensils, household appliances, medical equipment, auto parts and decorations.
- No.8: No.8 is a mirror-finished surface with the highest reflectivity without abrasive grains. The stainless steel deep processing industry also calls as 8K plates. Generally, BA materials are used as raw materials for mirror finishing only through grinding and polishing. After mirror finishing, the surface is artistic, so it is mostly used in building entrance decoration and interior decoration.
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