Alloy B2
2.4617 – N10665
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Material description
The material 2.4617 is a nickel-molybdenum alloy with a low carbon and silicon content. This ensures good corrosion properties – even when welded.
2.4617 (Alloy B2) exhibits excellent resistance to stress corrosion cracking, pitting and knife-edge corrosion. The alloy is also highly resistant to corrosion in reducing media such as hydrochloric acid – even at high temperatures.
AN OVERVIEW OF THE PROPERTIES OF 2.4617:
- Excellent resistance to stress corrosion cracking
- Resistant to pitting
- Resistant to blade line corrosion
- Corrosion-resistant in reducing media (e.g. hydrochloric acid)
- Can be used in oxidising gases (up to approx. 530 °C)
Applications
- Chemical industry
- Production of acetic acid
Chemical composition in %
| ASTM B335/564 | VdTÜV Material sheet 436 | |
|---|---|---|
| Ni | Rest | Rest |
| Fe, max. | 2,0 | 2,0 |
| Mn, max. | 1,0 | 1,0 |
| C, max. | 0,02 | 0,01 |
| Si, max. | 0,10 | 0,08 |
| S, max. | 0,03 | 0,015 |
| Cr, max. | 1,0 | 1,0 |
| Mo | 26,0 – 30,0 | 26,0 – 30,0 |
| P, max. | 0,04 | 0,03 |
| Co, max. | 1,00 | 1,00 |
Mechanical properties
| solution annealed | Bar | forging 7,94mm ≤ D ≤ 88,9mm ASTM B335 | ASTM B564 | Bar | forging D ≤ 90 mm VdTÜV Werkstoffblatt 436 |
|---|---|---|
| Rm (MPa) | ≥ 760 | 745 – 950 |
| Rp 0,2 (MPa) | ≥ 350 | ≥ 325 |
| Rp 1,0 (MPa) | ≥ 370 | |
| A (%) | ≥ 40 | ≥ 40 |
| Av (J) | ≥ 120 |
The specified values are non-binding guide values.