Alloy 28
Wst. 1.4563
UNS N08028
Stock program: Some sizes on stock, mainly on request
Specification: ASTM B668 / EN 10216-5
Maximum expose temperature: 600°C / 1110°F
Alloy 28 is a nickel-iron-chromium alloy with additions of molybdenum and copper. It has a high resistance to pitting, cursive corrosion and to stress-corrosion. Developed as a material for service in highly aggressive and corrosive environments, this alloy is especially resistant to sulfuric and phosphoric acid. The alloy 28 has a similar specification as alloy 825 tubes.
Characteristics
- Excellent abrasion and corrosion resistance
- Very good resistance to oxidizing media and strong acids
- Good resistance to sulphide cracking
- High resistance to inter granular, pitting and crevice corrosion
- Good weld ability and formability
Market applications:
- Chemical processing
- Oil and gas industry
- Pollution control equipment
- Acid production
- Hydraulic systems
Technical details
| Technical composition (%) | Fe | Cr | Ni | Mo | Mn | Cu | Si | P | N | C | S | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 28 | min | Bal. | 21.0 | 4.5 | 2.5 | - | - | - | - | 0.08 | - | - |
| max | - | 23.0 | 6.5 | 3.5 | 2.00 | 1.0 | 1.00 | 0.030 | 0.20 | 0.030 | 0.020 |
| Mechanical properties | 28 |
|---|---|
| Tensile strenght (mpa, min) | 550 - 750 |
| Yield strength (0.2% offset mpa, min) | 220 - 250 |
| Elongation (%, min) | 40 |
| Density / weight (g / cm3 / kg) | 7.9 |