What are the risks of oxide scale peeling off on 304H stainless steel at a high temperature of 650 ℃?

These risks not only affect the safe operation of the unit, but may also lead to equipment damage and increased maintenance costs. Therefore, measures need to be taken to reduce or avoid the formation and detachment of oxide scales, ensuring the safe and efficient operation of the unit.

What is 304H stainless steel?

304H stainless steel is a variant of 304 stainless steel, with the main difference being its higher carbon content, typically between 0.04% and 0.10%. The "H" in 304H represents "high temperature", which means it has better strength and corrosion resistance in high temperature environments

 

What is the difference between 304 and 304H?
304H stainless steel is the high carbon version of 304, referred to as S30409 according to Chinese standards. It has better high-temperature strength and oxidation resistance. The "H" in 304H represents high temperature, and the high carbon content ensures high temperature strength.

 

What is the difference between SA 240 304 and 304H?
The chemical composition of SA240 304H stainless steel plate has a high carbon content and can be used at higher temperatures. Meanwhile, due to its high carbon content, the anti-corrosion performance of SA304H stainless steel plate is lower than that of SA240 304 stainless steel plate and SA240 304L stainless steel plate.

 

Which is better, 304 stainless steel or 316 stainless steel?
316 stainless steel is more corrosion-resistant than 304 stainless steel, especially chloride. This makes it a common choice for applications where marine equipment and other materials are exposed to extremely high concentrations of chlorides or other oxidants

 

What do you use to weld 304H?
Carbide precipitation is harmless to high-temperature mechanical properties. 304/304H is welded using 22Cr 11Ni filler wire (ER308) or covered electrode (E308).