What is a 904l stainless steel pipe?
Austenitic stainless steel is very common in piping applications. They are used in various applications for their different unique qualities. The 904l stainless steel pipe is made up of chromium, nickel, and copper in the composition. The addition of copper into the composition makes the material more corrosion-resistant to acids.
ss 904l vs ss 316
The material composition is the major factor that makes the differences in the quality and properties. The 316 has a PREN value of 26.1 whereas the 904l has 36.7, which is over 25% higher than that of 316. The stainless steel 904l pipe has 28% nickel and 23% chromium in the composition, whereas the 316 grade only has 18% chromium and 8% nickel in the composition with 3% molybdenum. The 904l pipe has added copper content ranging from 1-2% of the composition.
These differences in composition make up physical and mechanical differences. The 316n has 205MPa minimum yield strength and 515MPa tensile strength. The density of 316 is 8000kg/m3. The minimum yield strength of the 940L grade is 220 MPa, which is 15MPa more than the 316 and the tensile strength is 490MPa which is 25MPa lower than the 316 grade. The density is also 7950kg/m3 which is slightly less than the 316.
Is ss 904l pipe machinable?
Machining is an operation carried out on the ss 904l pipe and pipes to make necessary adjustments before fitting the components into the piping system. The conditions for machining mostly depend on the ductility of the pipe and the hardness. The 904l pipe has much ductility and less hardness. This allows the pipes to be machined without brittleness risk. Therefore, the SS 904l welded pipe can be machined without risks.
904l stainless steel vs duplex
Duplex steels have ferritic and austenitic metallic microstructures. This allows the duplex steels to be magnetic and corrosion-resistant at the same time. The 904l pipe suppliers produce duplex steels as well, but the duplex steels are relatively expensive. The stainless steels that are of ferritic, austenitic, or martensitic nature are not quite expensive as the duplex steels. To get the duplex quality, the steel material has to undergo certain procedures, and the composition has to have certain elements in certain quantities. The wnr 1.4539 seamless pipe is cost-effective compared to the duplex steels, given that very high strength, heat resistance, and oxidation resistance are not required.
Compare the cost of 904l stainless steel seamless pipe in India and china
904l stainless steel seamless pipe price in China is lower than that of India. The main concern is the order quantity. The minimum order quantity to gain better prices from China are mostly above 500 tons. The minimum order quantities from India are lower, but the prices are higher. Depending on the delivery location, the customer has to calculate the real cost in addition to the FOB price.
Tips to prevent uns n08904 welded pipe cracking
UNS N08904 Welded pipe can withstand high temperatures and corrosion. However, certain steps can prevent the material from developing cracks. Heat treatment can prevent cracks from forming on unnecessary occasions. Post-weld heat treatment can be applied to improve the crack resistance of the pipes.
Other popular grades
