When 20# steel and 304 stainless steel are welded using ER309 wire, do they have the same corrosion resistance as carbon steel?
Thread Content
For the steam condensate pipes in the company, the original ends were made of 20# carbon steel and 304 stainless steel; since these are buried pipes, it is difficult to apply anti-corrosion measures using flanges. Consulting an expert, they said that it can be welded using 309 welding wire. What is the corrosion resistance at the weld joint? Is it prone to corrosion and leakage?
Steam condensate pipe. ER309 has better corrosion resistance than C.S ；
Based on feedback from those who have used the product, ER309 has better corrosion resistance than carbon steel. For welding carbon steel and stainless steel, 308 or 309 is commonly used, and it has many practical applications in engineering.
Why not consider Monel alloy? It is highly resistant to seawater corrosion; Monel 400 is recommended. This is a copper-nickel alloy with a copper content of over 72%, and our factory has it in stock
The company’s underground steam condensation pipes for saline-alkali lands – it’s too extravagant to use those
I checked online; for welding carbon steel and stainless steel, 308 or 309 should be used. The pipes are buried, making it difficult to check for leaks. The main concern is that different materials at the weld site may lead to charge accumulation, which could accelerate corrosion.
For buried pipelines, charge accumulation is something that needs to be taken into consideration; a case-by-case analysis is required. Generally, the electrical conductivity of the ground is utilized for this purpose