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904L Stainless Steel Pipe

High Temperature Thin Wall Seamless 904L Stainless Steel Pipe 904L stainless steel pipe(00Cr20Ni25Mo4.5Cu) is a kind of austenitic stainless steel with better corrosion resistance. With the adding of 1.5% Cu, it also has excellent corrosion resistance for reductive acids such as sulfuric acid...

High Temperature Thin Wall Seamless 904L Stainless Steel Pipe 

904L stainless steel pipe(00Cr20Ni25Mo4.5Cu) is a kind of austenitic stainless steel with better corrosion resistance. With the adding of 1.5% Cu, it also has excellent corrosion resistance for reductive acids such as sulfuric acid and phosphoric acid. In addition, it has low carbon characteristics in welding uses. 


Characteristics 

With the low content of carbon(Max 0.020%) in 904L, there will be no precipitation in common heat treatment and welding. This eliminates the risk of inter-granular corrosion that occurs after general heat treatment and welding. Because the carbon content of 904L is very low (Max 0.020%), so in the case of general heat treatment and welding, no carbides will be precipitated. This eliminates the risk of inter-granular corrosion that occurs after general heat treatment and welding. Due to the high content of chromium, nickel and molybdenum, with the addition of element Cu, 904L stainless steel tubes can be passivated even in reductive environments, for example it can be passivated in sulfuric acid and formic acid. The high nickel content makes the corrosion rate low in the active state. In the pure sulfuric acid with concentration range of 0 ~ 98%, the operating temperature of 904L can be up to 40 ℃. In the pure phosphoric acid with the concentration range of 0 ~ 85%, its corrosion resistance is very good. In the industrial phosphoric acid produced by wet processing, impurity has a strong effect on corrosion resistance. In all the phosphate, corrosion resistance of 904L stainless steel pipe is better than ordinary stainless steel pipe. In the strong oxidizing nitric acid, compared with highly alloyed steel with no containing of molybdenum, it has low corrosion resistance. The use of 904L stainless steel pipe in hydrochloric acid is only limited to the lower concentration 1-2%. The corrosion resistance performance of the 904L stainless steel pipe in this concentration range is better than that of the conventional stainless steel. The 904L stainless steel pipes has high point corrosion resistance. In the chloride solution, its anti crevice corrosion ability is also good. The high nickel content of 904L stainless steel pipe reduces the corrosion rate at the pits and crevices. When the temperature is higher than 60℃, the common austenitic stainless steel may be sensitive to stress corrosion in a chloride rich environment. This kind of sensitivity can be reduced by increasing the nickel content of stainless steel. Because of the high nickel content, 904L stainless steel pipe has high resistance ability to stress corrosion cracking in chloride solution, concentrated hydroxide solution and hydrogen sulfide rich environment.

AL-904L is a kind of highly alloyed austenitic stainless steel with low carbon content. It has better corrosion resistance than 316L and 317L. At the same time, it considered both price and the ratio of performance to price is very high. For the addition of 1.5% copper, it has excellent corrosion resistance for reducing acids such as sulfuric acid and phosphoric acid.


Weight Calculation 

Weight(kg)=Length(m)*Width(m)*Thickness(mm)*Density Value 

Specific Gravity of Stainless Steel: 

Chromium Stainless Steel 7.75 tons/M3 

Chromium Nickel Stainless Steel 7.93 tons / M3 

Iron 7.87 tons/M3

Theoretical Weight Calculation Formula for Stainless Steel Plate

Theoretical Weight: length(mm) * width (mm)* thickness (mm) * density = weight(kg)


Chemical Composition of 904L Stainless Steel Plates

Name

C

Si

Mn

P

S

Cr

Ni

Mo

Cu

ASTM

≤0.02

≤1.00

≤2.00

≤0.045

≤0.035

19.00~23.00

23.00~28.00

4.0~5.0

1.00~2.00


Density

Steel Grade

Density(g/cm3)

304,304L,305,321 201,202,301,302

7.93

316,316L,347 309S,310S

7.98

405,410,420

7.75

409,430,434

7.7

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