Stainless Steel 321

Stainless Steel 321

Working with 321 stainless

321 stainless materials cannot be hardened through heat treatment, only cold working.It is easily welded by all standard methods, and post-weld annealing is not required.This product is ductile and can be formed with ease.While corrosion resistance is generally excellent, especially against dilute organic acids, 321 SS is not suitable for chloride solutions, where it is susceptible to pitting and crevice corrosion.

Machining 321 stainless

Alloy 321 is prone to work hardening and can be difficult to machine due to the addition of titanium – recommend rigid, powerful machining with minimal vibration and a quality lubricant, with tools kept sharp at all times. Avoid interrupted cuts to prevent unnecessary work hardening.

Purchasing 321 stainless steel in sheet, coil, round bar, and hex bar

We are suppliers of 321 stainless steel sheet, coil, hex bar, and round bar stock in a variety of lengths and widths, and we can custom cut this material to your exact specifications. Our stainless steel coil can also be slit to your desired width.

Standard Inventory Specifications

• UNS S32100
• UNS S32109
• AMS 5510
• AMS 5645
• ASTM A 167
• ASTM A 240
• ASTM A 276
• ASTM A 479
• ASME SA 167
• ASME SA 240

Other industry standards we comply with:

• PWA-LCS
• GE Aircraft Engine (GT193)
• RR SABRe Edition 2
• DFARS Compliant

Common Trade Names

ATI 321 (™ Allegheny Technologies)

Common Applications of 321

• Useful in the chromium carbide precipitation range (800-1500°F, 427-815°C)
• Aircraft exhaust stacks
• Manifolds
• Chemical processing equipment
• Welded equipment
• Jet engine parts
• Heat Exchangers
• Expansion joints