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  • Alloy
321

Stainless 321 Product Guide

Applications | Specifications | Mechanical and Chemical Data | Tolerances

Overview

Reinforced with titanium, 321 stainless steel excels in high temperature environments, providing resistance to cracking and corrosion. Additionally, 321 stainless resists scaling at higher temperatures. The addition of titanium means that welding is not suggested for this alloy. Typically used in aircraft engines, expansion joints, thermal equipment, refinery equipment, and high temperature chemical processing equipment.

 

Common Trade Names

UNS S32100, AISI 321, Alloy 321, T 321, T-321, austenitic stainless steel

 

Other Resources

Safety Data Sheet | Weight Calculator | Mill Test Reports

Products

Purchase Hex Bar 321 | Round Bar 321 | Sheet/Plate 321 | Foil 321 | Foil Ticronic 321

Applications

  • Aircraft Engines
  • Expansion Joints
  • Thermal Equipment
  • High Temperature Chemical Processing

Stainless 321 Specifications

 

ASTM

AMS

A167 5510
  5645



Physical Properties 321
 
Density0.287 lb/in3
Ultimate Tensile Strength 92.5 ksi
Yield Tensile Strength 41.5 ksi
Shear Modulus 11,000 ksi
Shear Strength 64 ksi
Fatigue Strength 36 ksi
Hardness Rockwell | Brinell B92 | 190
Elongation at Break Percentage 42%
Reduction of Area 65%
Modulus of Elasticity29,000 ksi
Poisson's Ratio 0.28
Machinability Percentage36%
Melting Point2,550-2,600 °F
Specific Heat 1.1 x 10^-1 BTU/lb-°F
Thermal Conductivity 108 BTU-in/hr-ft^2-°F
Electrical Conductivity 2.4% IACS


Chemistry Information
Element
Percentage
C 0.08
Cr 18
Fe 68
Mn 2
P 0.045
S 0.03
Ni 11
Si 1
Ti 0.15
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