Search
Close this search box.

NEWS

China stainless steel factory

What is 304 stainless steel coils surface finish?

What is 304 stainless steel coils surface finish?

Through different processing methods of cold rolling and surface reprocessing after rolling, the surface finish of 304 stainless steel coils can have different types.

The surface processing of stainless steel coils have NO.1, 2B, No. 4, HL, No. 6, No. 8, BA, TR hard, Rerolled bright 2H, polishing bright and other surface finishes, etc.

At WAYEN, we strive to be a trustworthy supplier of 304 stainless steel sheets/coils that you can rely on. With excellence in quality and service at our core, you can count on us to deliver exceptional solutions every time. Contact us today to learn more about our products and services or to request a free sample. We’ll be happy to help you find the perfect solution for your needs.
Please feel free to email us at salepc@wayenind.com or call us at 0086 13106681701/WA:0086 13590571866. We look forward to helping you with your next project!

 

 

 

 

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.

 

———————————————————————————————————————————————————-

If necessary, please contact us with specifications and we will give you a quotation for reference first!❗️❗️❗️

New Center

More Posts

Aluminum Prices Surge to Nearly Two-Year High as Supply Concerns Intensify

Recently, aluminum prices have surged in the global market, reaching a near two-year high. This increase is primarily driven by supply concerns. Global mining giant Rio Tinto has announced a force majeure event on third-party contracts at its alumina refinery in Queensland, Australia, further pushing aluminum prices up. It is understood that Rio Tinto’s alumina

China’s Macro-Economic Optimism Keeps Aluminum Prices in High Volatility

The rise in oil prices and the fall of the US dollar index boosted market bullish confidence, resulting in LME aluminum closing up by 1.28% over the week. Frequent macroeconomic benefits in China supported strong gains in Shanghai aluminum, with aluminum ingot inventories remaining low. Today’s spot aluminum prices are expected to rise. The rise

What are the key technological research and innovations?

The New Science and Technology Progress column of the official website of the China Metal Society published the article “Research and Innovation on Key Technologies of High-Efficiency Low-Carbon High-Air Temperature Hot-blast Stoves” written by Shougang Group Co., Ltd., which introduced the relevant situation of this technology in detail and attracted the attention of the industry.

Nickel prices will continue to fluctuate strongly in May

In April, supported by the resonant rise in non-ferrous metal prices and its own fundamentals, nickel prices rose significantly, with a monthly increase of more than 9%. As the non-ferrous metal sector consolidates, the main contradiction between nickel supply and demand is expected to switch, and nickel prices are expected to continue a strong and

Send Us A Message

CONTACT US

Let's have a chat