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321 Stainless Steel

UNS S32100

Type 321 contains a titanium addition of at least five times the carbon content to overcome the sensitizing tendency during welding. Its corrosion resistance is similar to Type 304 but 321 performs better in the 800°-1650°F sensitization range. In Type 321, the oxide or carbonitride of titanium may develop minute black or dark gray inclusions. When the metal is ground or buffed these inclusions may appear and destroy surface appearance, although it will not damage the utility or workability of the metal. Resistance to abrasion is favorable.

Uses include aircraft engine components, chemical kilns, exhaust systems and stack liners, flash boilers and welded equipment.

Slitting Capabilities
Gauge Range
.004" to .190" (.102 mm to 4.826 mm)
Width Range
.250" to 60" (6.365 mm to 1524 mm)
ID
8, 12, 16 or 20 (inches)
OD
78" maximum
Coil Weight
40,000 lbs maximum
MECHANICAL PROPERTY LIMITS
Temper Tensile Strength Yield Strength Elongation Rockwell
KSi MPa KSi MPa in 2 inches %
Annealed 75 -515 30 -205 40 B-95 max.
CHEMICAL COMPOSITION LIMITS (%)
C
Carbon
Mn
Manganese
P
Phosphorus
S
Sulfur
Si
Silicon
Cr
Chromium
Ni
Nickel
N
Nitrogen
Mo
Molybdemum
Other
0.08 2 0.045 0.03 1 17.00-19.00 9.00-12.00 5 x C+N –0.70 - -
  • Chemical composition is percent maximum unless shown as a range or a minimum.
  • Source: Aluminum Standards and Data – The Aluminum Association, Inc.
  • Information presented as a guide for reference purposes only and is not intended to be used for product design or application.
Almetals is a world-class specialty aluminum supplier and metal supplier slitter and distributor for industries such as stamping, roll forming, and tube producers. Our coil products include: aluminum, brass & copper, clad metals, cold rolled, fin stock, and coated & stainless steels.
51035 Grand River Avenue
Wixom
Michigan
48393
United States