321
Wst. 1.4541
UNS S32100
Stock program: Some sizes on stock, mainly on request
Specification: ASTM A 269/A 213/ASME SA 213 / EN 10216-5/EN 10305 / NACE MR0175/PED 97/23 EC
Maximum service temperature: 650°C / 1205°F
Alloy 321 stainless steel is a titanium-stabilized version of alloy 304, used in particular applications within the sensitizing temperature range. It’s resistance to sensitization, coupled with it higher strength, at high temperatures makes it suitable in application where alloy 304 will become sensitized, or where 304L has insufficient hot strength.
Characteristics
- Excellent resistance to high-temperature corrosion
- Excellent formability
- Higher creep resistance
- Good resistance for intergranular corrosion when expose in midly corrosive environments
Market applications:
- Chemical & refineries
- Power plants
- Super heater and after burner parts
- Furnace components
Technical details
| Technical composition (%) | Fe | Cr | Ni | Mn | Si | P | C | S | Ti | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 321 | min | Bal. | 17.0 | 9.0 | – | – | – | – | – | – | |||||||||
| max | – | 20.0 | 13.0 | 2.00 | 0.75 | 0.030 | 0.080 | 0.040 | 0.040 | ||||||||||
| Mechanical properties | 321 | |
|---|---|---|
| Tensile strenght (mpa, min) nl | 500 – 730 | |
| Yield strength (0.2% offset mpa, min) | 200 | |
| Elongation (%, min) | 35 | |
| Density / weight (g / cm3 / kg) | 7.90 |