Alloy 800
1.4876 – N08800
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Material description
Material 1.4876 is an austenitic iron-nickel-chromium alloy available in several variants (1.4876H + 1.4876HT).
The nickel content of 1.4876 (Alloy 800) is above 30%, which reduces the tendency to form sigma phases. In addition, the alloy has good long-term mechanical properties and is resistant to oxidation and nitridation. The material has a good resistance to nitric acid and organic acids but only restricted resistance to sulphuric and hydrochloric acid. It also has a good resistance to reducing salt solutions.
An overview of the properties of 1.4876:
- Good long-term mechanical properties
- Good resistance to oxidation
- Good resistance to reducing salt solutions, nitric acid and organic acids
- Good resistance to oxidising, reducing and nitriding conditions
Applications
- Chemical and petrochemical industry
- Furnace construction
- Power plant industry
- Hydrogen industry
Chemical composition in %
| ASTM B408/564 | VdTÜV Material Sheet 412 | |
|---|---|---|
| Ni | 30.0 – 35.0 | 30.0 – 34.0 |
| Co, max. | 1.0 | |
| Ni + Co | 30.0 – 34.0 | |
| Cr | 19.0 – 23.0 | 19.0 – 23.0 |
| Fe, min. | 39.5 | |
| Mn, max. | 1.5 | 1.50 |
| C, max. | 0.10 | 0.04 – 0.10 |
| Cu, max. | 0.75 | 0.75 |
| Si, max. | 1.0 | 1.0 |
| S, max. | 0.015 | 0.020 |
| Al | 0.15 – 0.60 | 0.15 – 0.60 |
| Ti | 0.15 – 0.60 | 0.15 – 0.60 |
| Al + Ti, max. | 0.7* or 1.0 | |
| P, max. | 0.030 |
Mechanical properties
| solution annealed | Bar | Forging ASTM B408 | ASTM B564 | Bar/forging |
|---|---|---|
| Rm (MPa) | ≥ 515 | ≥ 517 | 450 – 700 |
| Rp 0.2 (MPa) | ≥ 205 | ≥ 207 | ≥ 170 |
| Rp 1.0 (MPa) | ≥ 200 | |
| A(%) | ≥ 30 | ≥ 30 | l ≥ 35, q/t ≥ 30 |
| Av (J) | l ≥ 160, q/t ≥ 80 | |
| Grain size | ≤ 5 |
Mechanical properties
| Soft-annealed | Bar/forging | |
|---|---|---|
| Rm (MPa) | 500 – 750 | |
| Rp 0.2 (MPa) | ≥ 210 | |
| Rp 1.0 (MPa) | ≥ 240 | |
| A (%) | l ≥ 35, q/t ≥ 30 | |
| A (J) | l ≥ 160, q/t ≥ 80 | |
| Grain size | ≤ 5 |
The specified values are non-binding guide values.