HASTELLOYC4Paduan iki kasusun saka Nikel, kromium, lan molibdenum. Iki dianggep minangka paduan sing paling serbaguna kanggo nglawan korosi. Paduan iki nduduhake resistensi marang pembentukan endapan wates butir nalika kena panas pengelasan, saengga cocok kanggo macem-macem aplikasi proses kimia ing kahanan dilas. Kajaba iku, Paduan C4 nuduhake resistensi sing luar biasa marang pitting, retakan stres-korosi, lan atmosfer oksidasi nganti 1900°F. Iki nduweni resistensi sing luar biasa kanggo macem-macem lingkungan kimia.
APLIKASI:
1. Industri kertas: Digester lan pabrik pemutih.
2. Lingkungan gas kecut: Komponen sing kena gas kecut.
3. Pabrik desulfurisasi gas buang: Peralatan sing digunakake ing pabrik desulfurisasi gas buang.
4. Lingkungan asam sulfat: Evaporator, penukar panas, filter, lan mixer sing digunakake ing lingkungan asam sulfat.
5. Reaktor asam sulfat: Peralatan sing digunakake ing reaktor asam sulfat.
6. Proses klorida organik: Peralatan sing digunakake ing proses klorida organik.
7. Proses katalis halida utawa asam: Peralatan sing digunakake ing proses sing nggunakake katalis halida utawa asam.
| Kelas | C276 | C22 | C4 | B3 | N | ||
| Bahan kimia Komposisi (%) | 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 | ngaso | ngaso | ngaso | ngaso | ≥65 | ngaso | |
| 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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