| Customization: | Available |
|---|---|
| Type: | 300 Sreise Tube |
| Standard: | AISI, ASTM, DIN, JIS, GB, BS |
Suppliers with verified business licenses
Audited Supplier Audited by an independent third-party inspection agency
Type 321 is a titanium stabilized chromium nickel austenitic stainless steel with corrosion resistance similar to 304/304L. This grade is typically used in the 800-1500˚F temperature range where it is stabilized against chromium carbide precipitation by the addition of titanium, which results in the precipitation of titanium carbides. Type 321 has excellent intergranular corrosion resistance after exposure to this temperature range, and this grade resists oxidation up to 1500˚F and has higher creep and stress rupture properties than 304/304L. It also possesses good low temperature toughness and is non-magnetic in the annealed condition.
Chemical Composition (wt%) limits as specified in ASTM A240 and ASME SA240
| Element | 321 |
| Carbon | 0.08 |
| Chromium | 17.0-19.0 |
| Nickel | 9.0-12.0 |
| Manganese | 2.00 |
| Silicon | 0.75 |
| Nitrogen | 0.10 |
| Phosphorus | 0.045 |
| Sulfur | 0.030 |
| Titanium | 5(C+N) min / 0.70 max |
| Grade | UNS | DIN | EN | ASTM | AMS | JIS |
| 321 |
UNS S32100 |
1.4541 | ASTM A313 ASTM A240 ASTM A479 |
|
SUS 321 |
Mechanical property requirements for annealed product as specified in ASTM A240 and ASME SA240
| Property | 321 |
| Yield Strength, min. (ksi) | 30 |
| Tensile Strength, min. (ksi) | 75 |
| Elongation, min. (%) | 40 |
| Hardness, max. (Rb) | 95 |
Typical physical properties for annealed grade 321 stainless sheets of steel are given in table.
Physical properties of 321-grade stainless steel in the annealed condition
| Grade | Density (kg/m3) | Elastic Modulus (GPa) | Mean Coefficient of Thermal Expansion (μm/m/°C) | Thermal Conductivity (W/m.K) | Specific Heat 0-100 °C (J/kg.K) | Electrical Resistivity (nΩ.m) | |||
| 0-100 °C | 0-315 °C | 0-538 °C | at 100 °C | at 500 °C | |||||
| 321 | 8027 | 193 | 16.6 | 17.2 | 18.6 | 16.1 | 22.2 | 500 | 720 |
Possible alternative grades to grade 321 stainless sheets of steel are given in table.
Possible alternative grades to 321-grade stainless steel
| Grade | Why it might be chosen instead of 321 |
| 3CR12 | Only a mild "high temperature" environment is present… up to about 600 °C. |
| 304H | Only a mild "high temperature" environment is present… up to about 800 °C. |
| 310 | The temperature of the operating environment is up to about 1100 °C - too high for 321 or 321H. |
| S30815 (253MA) |
The temperature of the operating environment is up to about 1150 °C- too high for 321 or 321H. |
Solution Treatment (Annealing) - heat to 950-1120 °C and cool rapidly for maximum corrosion resistance.
Stabilizing - heat to 870-900 °C for 1 hour per 25mm of thickness and air cool. Stabilization is recommended for most severe service conditions (above 425 °C) and particularly for material annealed at the upper side of the annealing temperature range.
Stress Relief - Heat to 700 °C for 1 to 2 hours and air cool.
These grades cannot be hardened by thermal treatment.
Typical applications include:
){kind=link}