310S vs 330 Stainless Steel: High-Temp Nickel-Alloyed Alloys

 

How do their chemical compositions differ?​

310S contains 24-26% chromium, 19-22% nickel, and carbon ≤0.08%. 330 has 17-20% chromium, 34-37% nickel, plus silicon and manganese, with higher nickel enhancing resistance to high-temperature corrosion.​

 

Which performs better at extreme temperatures?​

330 thrives in continuous use up to 1150°C, outperforming 310S in carburizing environments (e.g., furnace interiors with carbon-rich gases). 310S excels in oxidizing conditions like industrial ovens.​

 

How do they compare in corrosion resistance?​

330 resists carburization and sulfidation better than 310S, making it ideal for reducing atmospheres. 310S offers better oxidation resistance in high-heat air, suitable for kiln linings and incinerators.​

 

What about their fabrication properties?​

310S is more weldable and formable than 330, with good ductility for bending. 330 requires careful welding to avoid hot cracking, though it maintains strength in welded joints at high temperatures.​

 

Where are 310S and 330 commonly used?​

310S is in furnace linings, heat exchanger tubes, and incinerators. 330 finds applications in petrochemical furnace parts, annealing boxes, and components in carbon-rich high-heat environments.