Corrosion Resistance of 321 Stainless Steel

321 stainless steel offers similar corrosion resistance to 304, with added resistance to intergranular corrosion due to its titanium content.

Heat Resistance of 321 Stainless Steel

Good resistance to oxidation in intermittent service up to 900°C and in continuous service to 925°C.

Machinability of 321 Stainless Steel

321 stainless steel is similar to 304 in terms of machinability, with a hardening rate that makes it less machinable than 410 stainless steel. It is more difficult to machine due to its titanium stabilization.

Welding of 321 Stainless Steel

321 stainless steel is similar to 304 in terms of machinability, with a hardening rate that makes it less machinable than 410 stainless steel. It is more difficult to machine due to its titanium stabilization.

Hot Working of 321 Stainless Steel

321 stainless steel is similar to 304 in terms of machinability, with a hardening rate that makes it less machinable than 410 stainless steel. It is more difficult to machine due to its titanium stabilization.

Annealing of 321 Stainless Steel

Solution heat treatment should be conducted at 920-1150℃ with rapid cooling. Stabilization treatment can be performed at 850-930℃ if specified. The solution temperature should not exceed 1066℃ to avoid chromium precipitation.

Heat Treatment of 321 Stainless Steel

321 stainless steel cannot be hardened by heat treatment; it can only be hardened by cold working​.

Cold Working of 321 Stainless Steel

321 stainless steel is similar to 304 in terms of machinability, with a hardening rate that makes it less machinable than 410 stainless steel. It is more difficult to machine due to its titanium stabilization.

• Corrosion Resistance: 321 offers better resistance to intergranular corrosion than 304, especially after exposure to high temperatures.
  
  
• High-Temperature Performance: 321 can withstand higher temperatures than 304, maintaining mechanical properties and preventing carbide precipitation.
  
  
• Cost: 304 is generally more cost-effective for general-purpose applications, but 321 is preferred for high-temperature environments and specific corrosion-resistant applications.

• Corrosion Resistance: 316 stainless steel provides better overall corrosion resistance, particularly in marine and chloride environments, due to its molybdenum content.
  
  
• High-Temperature Performance: 321 is better suited for high-temperature applications up to 900°C, whereas 316 performs well up to 800°C (1472°F).
  
  
• Application Specifics: Choose 316 for environments with severe corrosion issues and 321 for applications requiring high-temperature stability and resistance to intergranular corrosion.