904L (UNS N08904) is a superaustenitic stainless steel that is designed for moderate to high corrosion resistance in a
wide range of process environments. The combination of high chromium and nickel content, coupled with additions of
molybdenum and copper, assure good to excellent corrosion resistance.
With its highly alloyed chemistry-25% nickel and 4.5% molybdenum, 904L provides good chloride stress corrosion cracking
resistance, pitting and general corrosion resistance superior to 316L and 317L molybdenum enhanced stainless steels.
Alloy 904L was originally developed to withstand environments containing dilute sulfuric acid. It also offers good resistance
to other inorganic acids such as hot phosphoric acid as well as most organic acids.
Alloy 904L is easily welded and processed by standard shop fabrication practices.
The high content of alloying elements in 904L gives the alloy exceptionally good resistance to uniform corrosion.
904L was originally developed to withstand environments containing dilute sulfuric acid, and is one of the few stainless
steels that, at temperatures up to 95°F (35°C), provides full resistance in such environments within the entire concentration
range of 0 to 100%. 904L also offers good resistance to a number of other inorganic acids, such as phosphoric acid and
most organic acids. However, acids and acid solutions containing halide ions can be very aggressive, and the corrosion
resistance of 317L, 317LMN and 904L may be insufficient.
Fractional distillation of tall oil often needs better material than 316L or even the more frequently used 317LMN. In these
hot concentrated caustic solutions, the corrosion resistance is mainly determined by the nickel content of the material.
With a nickel content of 25%, 904L has proven to be a good alternative to most conventional stainless steels.
Conventional stainless steels such as 304L and 316L are susceptible to chloride stress corrosion cracking (SSC) under
certain conditions. Resistance to SSC increases with the increased content of nickel and molybdenum. Therefore, the
higher performance austenitic stainless steels such as 904L have very good resistance to SSC. The table in the upper
right corner shows resistance to SSC in a chloride solution under evaporative conditions. High performance austenitic
steels and duplex stainless steels clearly outperform 316L.
440B,440C,440F,610,630,631,632,635,660,Alloy 200,Monel 400 ,Alloy K-500 ,Inconel 600 , Incconel 601,
Inconel 625 , Inconel 718 , Alloy 800 ,Alloy 800H,Alloy 800HT,Inconel 825,Alloy 276, Alloy 20, Alloy 59Chemical Composition
Stainless Steel Seamless Pipe Or Welded Pipe Process
|Tianjin Zhongyantiancheng Steel Co.,Ltd|
|Commodity||Stainless Steel Pipe/Welded Steel Tube/Seamless Steel Pipe|
|Standard||GB|| JIS||ASTM/ASME||DIN |
|Length||Produce as customers' request|
|manufacture||Hot Rolled/Cold Drawn|
|Packing||Packed in bundles with standard export sea-worthy package|
|Delivery Time||Within 15 working days, according to customers' quantities|
|Quality||High Quality.SGS inspection is accepted if needed|
|Place of Origin||Tianjin|
|Application||Foodstuff, Gas, metallurgy, biology, electron, chemical etc.|
|Note||We can also do other materials|
Stainless Steel Seamless Or Welded Pipe Package