HASTELLOYC4O se u'amea fa'afefiloi e aofia ai le Nickel, chromium, ma le molybdenum. E lauiloa tele o le u'amea fa'afefiloi e sili ona aogā mo le tete'e atu i le 'ele. O lenei u'amea fa'afefiloi e tete'e atu i le fausiaina o ni mea e fa'aputu ai le laina o fatu pe a fa'avevela, ma talafeagai ai mo le tele o fa'agasologa fa'akemikolo i lona tulaga fa'afefiloi. E le gata i lea, o le Alloy C4 e tete'e atu i le pitting, stress-corrosion cracking, ma le oxidizing atmospheres e o'o atu i le 1900°F. E iai lona tete'e atu i le tele o siosiomaga fa'akemikolo.
TALOSAGA:
1. Alamanuia pepa: O falegaosimea e fa'amama ai mea'ai ma falegaosimea e fa'apa'epa'e ai.
2. Siosiomaga kasa oona: Vaega e fa'aalia i le kasa oona.
3. La'au e fa'amamā ai le kesi asu: Meafaigaluega e fa'aaoga i la'au e fa'amamā ai le kesi asu.
4. Siosiomaga o le sulfuric acid: Evaporators, exchanger heat, filters, ma mixers e faʻaaogaina i siosiomaga o le sulfuric acid.
5. Reactors o le sulfuric acid: Meafaigaluega e faʻaaogaina i reactors o le sulfuric acid.
6. Fa'agasologa o le chloride fa'alenatura: Meafaigaluega e fa'aaogaina i le fa'agasologa o le chloride fa'alenatura.
7. Fa'agasologa o le halide po'o le acid catalyst: Meafaigaluega e fa'aaogaina i fa'agasologa e fa'aaogaina ai le halide po'o le acid catalysts.
| Vasega | C276 | C22 | C4 | B3 | N | ||
| Kemikolo Fa'atulagaga (%) | C | ≤0.01 | ≤0.015 | ≤0.015 | ≤0.02 | ≤0.01 | 0.04-0.08 |
| Mn | ≤1 | ≤0.5 | ≤1 | ≤1 | ≤3 | ≤1 | |
| Fe | 4-7 | 2-6 | ≤3 | ≤2 | ≤1.5 | ≤5 | |
| P | ≤0.04 | ≤0.02 | ≤0.04 | ≤0.04 | – | ≤0.015 | |
| S | ≤0.03 | ≤0.02 | ≤0.03 | ≤0.03 | – | ≤0.02 | |
| Si | ≤0.08 | ≤0.08 | ≤0.08 | ≤0.1 | ≤0.1 | ≤1 | |
| Ni | malolo | malolo | malolo | malolo | ≥65 | malolo | |
| Co | ≤2.5 | ≤2.5 | ≤2 | ≤1 | ≤3 | ≤0.2 | |
| Ti+Cu | – | – | ≤0.7 | – | ≤0.4 | ≤0.35 | |
| Al+Ti | – | – | – | – | ≤0.5 | ≤0.5 | |
| Cr | 14.5-16.5 | 20-22.5 | 14-18 | ≤1 | ≤1.5 | 6-8 | |
| Mo | 15-17 | 12.5-14.5 | 14-17 | 26-30 | ≤28.5 | 15-18 | |
| B | – | – | – | – | – | ≤0.01 | |
| W | 3-4.5 | 2.5-3.5 | – | – | ≤3 | ≤0.5 | |
| V | ≤0.35 | ≤0.35 | – | 0.2-0.4 | – | ≤0.5 | |
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