I-HASTELLOYC4yi-alloy eyenziwe yiNickel, ichromium, kunye ne-molybdenum. Ithathwa njengeyona ngxubevange isebenziseka kakhulu ekulweni nokugqwala. Le ngxubevange ibonisa ukumelana nokwakheka kwe-grain boundary precipitates xa iphantsi kobushushu be-welding, nto leyo eyenza ukuba ifaneleke kwiinkqubo ezahlukeneyo zeekhemikhali kwimeko yayo ye-welding. Ukongeza, i-Alloy C4 ibonakalisa ukumelana okugqwesileyo kwi-pitting, i-stress-corrosion cracking, kunye ne-oxidizing atmospheres ukuya kuthi ga kwi-1900°F. Inokuxhathisa okumangalisayo kwiindawo ezahlukeneyo zeekhemikhali.
ISICELO:
1. Ishishini lephepha: Ii-digesters kunye nezityalo ze-bleach.
2. Iindawo ezisebenzisa igesi emuncu: Izinto ezivezwa yigesi emuncu.
3. Izityalo zokususa i-flue-gas: Izixhobo ezisetyenziswa kwizityalo zokususa i-flue-gas.
4. Iindawo ze-asidi ye-sulfuric: Ii-evaporators, ii-heat exchangers, izihluzi, kunye nee-mixers ezisetyenziswa kwiindawo ze-asidi ye-sulfuric.
5. Iireactor ze-sulfuric acid: Izixhobo ezisetyenziswa kwiireactor ze-sulfuric acid.
6. Inkqubo ye-organic chloride: Izixhobo ezisetyenziswa kwinkqubo ye-organic chloride.
7. Iinkqubo ze-Halide okanye i-acid catalyst: Izixhobo ezisetyenziswa kwiinkqubo ezisebenzisa i-halide okanye i-acid catalysts.
| Ibanga | C276 | C22 | C4 | B3 | N | ||
| Ikhemikhali Ukwakhiwa (%) | 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 | ukuphumla | ukuphumla | ukuphumla | ukuphumla | ≥65 | ukuphumla | |
| Co | ≤2.5 | ≤2.5 | ≤2 | ≤1 | ≤3 | ≤0.2 | |
| I-Ti+Cu | – | – | ≤0.7 | – | ≤0.4 | ≤0.35 | |
| I-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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