Incoloy 800* * Trade name of Special Metals Group of Companies
W.NR 1.4875
UNS N08800
AWS 020
UNS N08800
AWS 020
This Nickel-Iron-Chromium alloy has good strength and
excellent resistance to oxidation and carburisation in high
temperature atmospheres.
excellent resistance to oxidation and carburisation in high
temperature atmospheres.
Incoloy 800 also resists corrosion in many aqueous environments.
Applications include:
- Process Piping
- Heat Exchangers
- Carburising Equipment
- Heating Element Sheathing
| Approximate Chemical Composition | |
| Ni | 30-35% |
| Fe | 39.5% min |
| Cr | 19-23% |
| C | 0.1% max |
| Al | 0.15 - 0.6% |
| Ti | 0.15 - 0.6% |
| DENSITY | 7.94 g/cm3 | 0.287 lb/in3 |
| MELTING POINT | 1385 oC | 2525 oF |
| COEFFICIENT OF EXPANSION | 14.4 µm/m °C ( 20 - 100°C) |
7.9 x 10-6 in/in
°F ( 70 - 212°F) |
| MODULUS OF RIGIDITY | 78.9 kN/m2 | 11444 ksi |
| MODULUS OF ELASTICITY | 196.5 kN/m2 | 28500 ksi |
| CONDITION OF SUPPLY | HEAT TREATMENT (AFTER FORMING) |
| Annealed/Spring Temper | Stress relieve at 450 - 470oC (840 - 880oF) for 30-60 minutes and air cool. |
| CONDITION |
APPROX TENSILE STRENGTH |
APPROX SERVICE TEMPERATURE |
||||
| Annealed | 600-800 N/mm2 | 87-116 ksi | -200o to +815oC | -330o to +1500oF | ||
| (for lightly stressed applications) | ||||||
| Spring Temper | 800-1100 N/mm2 | 116-159 ksi | -200o to +815oC | -330o to +1500oF | ||
| (for lightly stressed applications) | ||||||
| STANDARDS |
| BS 3075 & 3076 NA 15 |
