Wholesale Professional Anti Corrosion 2B Finish 904L Stainless Steel Sheet

Wholesale Professional Anti Corrosion 2B Finish 904L Stainless Steel Sheet

904L Stainless steel sheet is divided into: hot-rolled stainless steel sheet, cold-rolled stainless steel sheet, finishing stainless steel sheet. Classification Super austenitic stainless steel (904L stainless steel sheet) is a very low carbon content of high alloying austenitic stainless steel,...
Product description

904L Stainless steel sheet is divided into: hot-rolled stainless steel sheet, cold-rolled stainless steel sheet, finishing stainless steel sheet.


Classification

Super austenitic stainless steel (904L stainless steel sheet) is a very low carbon content of high alloying austenitic stainless steel, in dilute sulfuric acid has a good corrosion resistance, designed for the harsh environment of corrosive conditions. With high chromium content and enough nickel content, the addition of copper makes it have strong acid resistance, especially for the corrosion of chloride clearance and stress corrosion cracking has a high resistance, not easy to appear erosion spots and cracks, pitting corrosion resistance slightly superior and other steel, with good processability and solderability, can be used for pressure vessels.


Grades

China Grade: 00cr20ni25mo4 5Cu

German Grade: 1.4539

American Grade: N08904

European Grade: 904L


904L stainless steel sheet 1.jpg


904L Stainless Steel Chemical Composition(%)

C ≤ 0.03

Si ≤ 1.00 

Mn ≤ 2.00

P ≤ 0.035

S ≤ 0.03

Ni: 23.0~25.0

Cr: 18.0~20.0

Mo: 3.0~4.0

Cu: 4.0~5.0


Performance

Alloys and States: 926

Tensile Strength (Rm n/mm2): 490

Yield Strength (RP0.2n/mm2): 216

Elongation Rate A5%: 35

Density: 8.24g/cm3


Use

Petroleum, petrochemical equipment, such as petrochemical equipment in the reactor.

Sulfuric acid storage and transport equipment, such as heat exchangers.

Power Plant flue gas desulfurization device, the main use of parts are: Absorber tower body, flue, stall door, interior parts, sprinkler system. * Scrubber and fan in organic acid treatment system.

Sea water treatment equipment, seawater heat exchanger, paper industry equipment, sulfuric acid, nitric acid equipment, acid, pharmaceutical industry and other chemical equipment,

Pressure vessels, food equipment.

Pharmaceutical Factory: Centrifuge, reactor, etc.

Plant food: soy sauce cans, cooking wine, salt cans, equipment and dressings.

Matching welding material model: electrode (E385-16/17), welding wire (ER385).


904L stainless steel sheet 2.jpg


904L stainless steel sheet is widely used, with good corrosion resistance, heat resistance, low-temperature strength and mechanical properties, stamping bending and other hot processing, no heat treatment hardening phenomenon. Widely used in household products (1, 2 types of tableware), cabinets, indoor pipelines, water heaters, boilers, bathtubs, auto parts, medical equipment, building materials, chemical, food industry, agriculture, marine components.


Corrosion Resistance

In general heat treatment and welding conditions, there will be no carbide precipitation, eliminating the general heat treatment and welding after the present intergranular corrosion risk. Because of the high CR-ni-mo content and the addition of copper elements, 904L can be deactivated even in reductive environments, such as sulfuric acid and formic acid. High nickel content also has a lower corrosion rate in the active state. In the 0~98% concentration range of pure sulfuric acid, 904L can be used at temperatures up to 40 degrees Celsius. The corrosion resistance of pure phosphoric acid in the 0~85% concentration range is very good. In industrial phosphoric acid produced by wet process, impurities have a strong influence on corrosion resistance. In all kinds of phosphoric acid, 904L corrosion resistance is better than ordinary stainless steel. In strong oxidizing nitric acid, the corrosion resistance of 904L is lower than that of high alloyed steel without molybdenum. In hydrochloric acid, the use of 904L is limited to lower concentrations of $number. In this concentration range. 904L corrosion resistance is better than conventional stainless steel. 904L Steel has high resistance to pitting corrosion. In the chloride solution, its ability to resist crevice corrosion is also good. The high nickel content of 904L reduces the corrosion rate at the pits and crevices. Ordinary austenitic stainless steels may be sensitive to stress corrosion in a chloride-rich environment when the temperature is higher than 60 degrees Celsius, and the sensitivity can be reduced by increasing the nickel content of stainless steel. Due to the high nickel content, 904L in the chloride solution, concentrated hydroxide solution and rich hydrogen sulfide environment, has a high stress corrosion cracking capacity.

 


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