904L Stainless Steel Pipes are low-carbon and high alloy stainless steel material. 904L stainless steel pipes has excellent corrosion resistance and high temperature performance, as well as good mechanical properties. Mainly used for making equipment resistant to chemical corrosion media such as sulfuric acid, phosphoric acid, and hydrofluoric acid. It can operate stably for a long time in various harsh environments, such as strong acids and bases, and is not easily corroded and eroded.
The production process of 904L stainless steel pipes is very strict, including steel making, continuous casting, heat treatment, and forming processing, to ensure the comprehensive performance of the final product. This strict production process has created excellent quality of 904L stainless steel.
ASTM A312 NO8904 (904L) Stainless Steel Pipes
ASTM A312 is a standard developed by the American Society for Testing and Materials (ASTM) for austenitic stainless steel seamless and welded steel pipes. This standard specifies in detail the requirements for the chemical composition, mechanical properties, corrosion resistance, inspection and testing methods of steel pipes to ensure that the quality and performance of steel pipes meet specific usage requirements.
ASTM A312 N08904 (904L) stainless steel seamless pipes are a high-performance stainless steel material with excellent corrosion resistance and high temperature performance. It contains a high proportion of alloying elements such as chromium, nickel, and molybdenum, giving it excellent resistance to pitting corrosion, crevice corrosion, and stress corrosion.
Chemical Composition
| C | Mn | P | S | Si | Ni | Cr | Mo | N | Cu | |
| MIN | 23.00 | 19.00 | 4.00 | 1.00 | ||||||
| MAX | 0.02 | 2.00 | 0.040 | 0.030 | 1.00 | 28.00 | 23.00 | 5.00 | 0.10 | 2.00 |
Mechanical Properties
| MATERIAL | T.S (MPA) | Y.S (MPA) | EL % |
| ASTM A312 N08904 | 490 min | 215 min | 35 min |
SS304 VS SS904L Stainless Steel Pipes
From the perspective of chemical composition and alloy content, 904L stainless steel is an ultra-high alloy grade stainless steel, containing various alloying elements such as nickel, chromium, molybdenum, and copper, and the alloying element content is much higher than 304L stainless steel. This difference makes 904L stainless steel have better corrosion resistance and wear resistance.
ASTM A312 TP304L Chemical Composition
From the perspective of mechanical properties, 904L stainless steel has excellent activation passivation transformation ability and excellent corrosion resistance, especially in non oxidizing acids such as sulfuric acid, acetic acid, formic acid, and phosphoric acid. At the same time, it also has good resistance to crevice corrosion and stress corrosion. Although 304L stainless steel also has good corrosion resistance, its corrosion resistance may be slightly inferior to 904L. In addition, the mechanical properties of 904L stainless steel are relatively better, and its performance indicators such as tensile strength and elongation are usually higher.
ASTM A312 TP304L Mechanical Properties
Overall, there are significant differences between SS904L stainless steel pipes and 304L stainless steel pipes in terms of chemical composition, performance characteristics, and application fields. The performance of SS904L stainless steel pipes in pipeline systems with corrosive media such as acid and alkali is better than that of 304L stainless steel, but the price of SS904L stainless steel pipes are also much higher than that of SS304L stainless steel pipes. Therefore, when choosing which type of stainless steel pipe to use, it is necessary to make a judgment based on the specific usage environment and requirements.
Application
904L stainless steel pipes has become an indispensable and important material in modern industry due to its excellent performance and wide range of applications. SS904L stainless steel pipes are widely used in various fields such as chemical, petroleum, pharmaceutical, food, and energy.
In the field of chemical engineering, it is often used to manufacture various chemical equipment and pipelines, such as reactors, storage tanks, transportation pipelines, etc.
In the field of oil, it is often used in offshore oil exploration and development, and can withstand extreme working environments and pressures.
In the pharmaceutical and food industries, 904L stainless steel pipes are used to manufacture various processing equipment and pipelines, ensuring product quality and safety.
In the field of energy, it is used to manufacture various high-temperature and high-pressure equipment and pipelines, such as boilers, steam turbines, gas turbines, etc.