310 vs 330 Stainless Steel: High-Temperature Powerhouses

 

How do their chemical compositions differ?​

310 contains 24-26% chromium, 19-22% nickel, and 0.20% max carbon. 330 has 17-20% chromium, 34-37% nickel, and 0.15% max carbon, with higher nickel for enhanced high-temperature stability.​

 

Which performs better at extreme temperatures?​

310 excels in continuous use up to 1150°C, resisting oxidation and scaling. 330 handles slightly lower temps (up to 1038°C) but offers better carburization resistance, making it ideal for reducing atmospheres in furnaces.​

 

How do they compare in corrosion resistance?​

310 has better resistance to sulfidation and high-temperature corrosion, suitable for chemical processing. 330 resists carburization well, making it better for furnace parts in carbon-rich environments, though both lag behind 316 in aqueous settings.​

 

What about their fabrication properties?​

310 is more formable and weldable, with good ductility for complex shapes. 330 work-hardens more quickly, requiring annealing during cold working, but its high nickel content makes it stable in prolonged heat.​

 

Where are 310 and 330 commonly used?​

310 is used in incinerators, boiler parts, and chemical reactors. 330 finds applications in furnace retorts, heat-treating baskets, and kilns, especially in carburizing or reducing atmospheres.