For more information, please visit 904l pipe suppliers.
Technical Data Sheet of Stainless Steel Pipe & Tube
Product NameAISI 904L (UNS N, DIN 1.) Stainless Steel Seamless Pipes & Tubes
Equivalent Materials AISI 904L, UNS N, DIN 1., AISI 904L, SUS 890L, NAS 255, 00Cr20Ni25Mo4.5Cu, X1NiCrMoCu25-20-5 Type Seamless Shape Square / Rectangular / Round Standard GB,AISI,ASTM,DIN,EN,JIS
Product Details of ASTM A312 904L Stainless Steel Seamless Pipes&#;
Overview of AISI 904L Stainless Steel Seamless Pipes:
904L super austenitic stainless steel is a low-carbon, high-nickel, molybdenum austenitic stainless and acid-resistant steel, which is a proprietary material imported from France H·S. It has good activation-passivation transformation ability, excellent corrosion resistance, good corrosion resistance in non-oxidizing acids such as sulfuric acid, acetic acid, formic acid, and phosphoric acid, and good corrosion resistance in neutral chloride-containing media It has good pitting corrosion resistance and good resistance to crevice corrosion and stress corrosion. It is suitable for sulfuric acid of various concentrations below 70°C, and has good corrosion resistance in acetic acid at any concentration and at any temperature and the mixed acid of formic acid and acetic acid under normal pressure.
Super austenitic stainless steel 904L (00Cr20Ni25Mo4.5Cu; UNS: N; EN: 1.) is a high-alloy austenitic stainless steel with low carbon content. It has good corrosion resistance in dilute sulfuric acid and is specially designed for corrosion conditions. Designed for harsh environments. It has a high chromium content and sufficient nickel content. The addition of copper makes it highly resistant to acid, especially to chloride crevice corrosion and stress corrosion cracking. It is not easy to appear corrosion spots and cracks, and is resistant to spots. Corrosion ability is slightly better than other steel grades, has good workability and weldability, and can be used in pressure vessels.
Chemical Composition of ASTM A312 UNS N Seamless Pipe:
alloy
%
nickel
chromium
molybdenum
copper
iron
carbon
manganese
silicon
phosphorus
sulfur
904L
min
23
19
4
1
margin
max
28
twenty three
5
2
0.02
The company is the world’s best alloy 904l tube factory supplier. We are your one-stop shop for all needs. Our staff are highly-specialized and will help you find the product you need.
2
1
0.045
0.035
Physical Properties of ASME SA312 SS 904L Seamless Pipes:
Density: 8.24g/cm3
Melting point: - &#;
Magnetism: None
Heat treatment: heat preservation between -&#; for 1-2 hours, rapid air cooling or water cooling.
Mechanical Properties of Stainless Steel 904L Seamless Pipes:
Alloy state
tensile strength
Rm N/mm2
Yield Strength
RP0.2N/mm2
Elongation
A5%
904L
490
216
35
Since the carbon content of 904L is very low (maximum 0.020%), there will be no carbide precipitation in the case of general heat treatment and welding. This eliminates the risk of intergranular corrosion that occurs after general heat treatment and welding. Due to the high content of chromium, nickel and molybdenum and the addition of copper, 904L can be passivated even in reducing environments such as sulfuric acid and formic acid. The high nickel content makes it have a lower corrosion rate in the active state.
In pure sulfuric acid in the concentration range of 0~98%, the operating temperature of 904L can be as high as 40 degrees Celsius.
In pure phosphoric acid in the concentration range of 0-85%, its corrosion resistance is very good. In the industrial phosphoric acid produced by the wet process, impurities have a strong influence on the corrosion resistance. Among all kinds of phosphoric acid, 904L has better corrosion resistance than ordinary stainless steel. Among the strong oxidizing nitric acid, 904L has lower corrosion resistance than high-alloyed steel without molybdenum. In hydrochloric acid, the use of 904L is limited to a lower concentration of 1-2%.
In this concentration range, the corrosion resistance of 904L is better than that of conventional stainless steel. 904L stainless steel pipe has high resistance to pitting corrosion. Its crevice corrosion resistance in chloride solution is also very good. The high nickel content of 904L reduces the corrosion rate at the pits and crevices. Ordinary austenitic stainless steel may be sensitive to stress corrosion in a chloride-rich environment when the temperature is higher than 60 degrees Celsius. By increasing the nickel content of stainless steel, this sensitization can be reduced. Due to the high nickel content, 904L stainless steel tube has high resistance to stress corrosion cracking in chloride solution, concentrated hydroxide solution and hydrogen sulfide environment.
Matching welding materials: welding rod (E385-16/17), welding wire (ER385).
Application of ASTM A312 904L Stainless Steel Seamless Pipe:
* Petroleum and petrochemical equipment, such as reactors in petrochemical equipment, etc.
* Sulfuric acid storage and transportation equipment, such as heat exchangers, etc.
* Power plant flue gas desulfurization device, the main use parts are: the tower body of the absorption tower, flue, gate plate, internal parts, spray system, etc.
* Scrubber and fan in the organic acid treatment system.
*Sea water treatment equipment, sea water heat exchanger, paper industry equipment, sulfuric acid, nitric acid equipment, acid making, pharmaceutical industry and other chemical equipment, pressure vessels, food equipment.
*Pharmaceutical factories: centrifuges, reactors, etc.
*Plant food: soy sauce cans, cooking wine, salt cans, equipment and dressings.
* 904L is a matched steel grade for the strong corrosive medium of dilute sulfuric acid.
For more information about AISI 904L (UNS N, DIN 1.) Stainless Steel Seamless Pipes & Tubes, please call +86-731- or send an to []
If you are looking for more details, kindly visit nickel 400.