Stainless Steel Grade 321: forms, specifications and uses
Stainless Steel Grade 321 (UNS S32100) is an austenitic chromium-nickel stainless steel that also contains titanium.
Titanium Industries offers Stainless Steel Grade 321 Round Bar and Stainless Steel Grade 321 Hex Bar from its locations.
Stainless Steel Grade 321 is supplied to specifications including AMS 5645, AMS-QQ-S-763, ASTM A276, ASTM A320, ASTM A479 and ASTM A484.
Typical uses of Stainless Steel Grade 321 include commercial and military aircraft, automotive, oil & gas, agricultural and forged valve bodies and pumps.
For Stainless Steel Grade 321, request a quote online or contact your nearest Titanium Industries location. Alloy data on this page is for reference only, not for design.
Stainless Steel Grade 321 | UNS# S32100 is an austenitic chromium-nickel stainless steel that also contains titanium. The addition of titanium reduces and prevents carbide precipitation during welding processes. Type 321 demonstrates excellent oxidation and corrosion resistance and possess good creep strength. Often used for service in the 1000° to 1600°F temperature range, Stainless Steel Grade 321 can be found in applications that involve continuous and intermittent service temperatures within the carbide precipitation range of 800° to 1500°F.
Stainless Steel Grade 321 Specifications:
Stainless Steel Grade 321 product forms offered at all Titanium Industries' locations:
Stainless Steel Grade 321 Applications:
- Commercial and Military Aircraft
- Automotive
- Oil & Gas
- Agricultural
- Forged Valve Bodies and Pumps
DISCLAIMER: Alloy data sheets are for reference only, not for design purposes.
| Chemical Composition | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Fe 69.53% | Cr 18.0% | Mn <=2.0% | C 0.080% | Si <=1.0% | |||||
| Ni 10.5% | S <=0.030% | Ti 0.40% | P <=0.045% | ||||||
| PHYSICAL PROPERTIES | ||||||
|---|---|---|---|---|---|---|
| Density | Electrical conductivity (% IACS) | Thermal conductivity (BTU-in/hr-ft²-°F) | Specific heat capacity | Thermal expansion (1/°F) | Melting Point (°F) | |
| 0.289 | 2.4 | 112 | 0.12 | 0.00000928 | 2550 | |
| Mechanical Properties | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Property | Minimum | Maximum | |||||||
| Yield Strength Range (Rp0.2 Offset) (ksi) | 30 | 34.8 | |||||||
| Tensile Strength Range (Rm) (ksi) | 74.7 | 89.9 | |||||||
| Elongation (AL=5 x Ø) | 40.0% | 55.0% | |||||||
| Brinell Hardness (H) | 187 | 215 | |||||||
| Modulus of Elasticity (ksi) (E): 28000 | |||||||||
| Machineability General Index: 36% | |||||||||
Stainless Steel Grade 321: questions and answers
What is Stainless Steel Grade 321?
What is Stainless Steel Grade 321?
Stainless Steel Grade 321 (UNS S32100) is an austenitic chromium-nickel stainless steel that also contains titanium.
Which Stainless Steel Grade 321 product forms does Titanium Industries stock?
Which Stainless Steel Grade 321 product forms does Titanium Industries stock?
Stainless Steel Grade 321 Round Bar and Stainless Steel Grade 321 Hex Bar.
Which specifications does Stainless Steel Grade 321 meet?
Which specifications does Stainless Steel Grade 321 meet?
AMS 5645, AMS-QQ-S-763, ASTM A276, ASTM A320, ASTM A479 and ASTM A484.
What is Stainless Steel Grade 321 used for?
What is Stainless Steel Grade 321 used for?
Commercial and military aircraft, automotive, oil & gas, agricultural and forged valve bodies and pumps.