Molybdenum et Chromium Molybdenum Heat Resistant Steel Welding Electrode
R717
AWS A5.5 E9015-B9
Descriptio: R717 electrode chalybis resistens est cum sodium humili hydrogenii membranarum continentis 9% Cr – 1% Mo-V-Nb.Usus DCEP (electro positivo directo) et in omnibus positionibus conflari potest.Ob parvam quantitatem Nb et V additionem, metallum depositum optimum caliditas resistentiae reptant.
Applicatio: Pro glutino superheato fistulae adhibito et capita calidissimae et altae pressurae boilers, ut A213-T91/A335-P1 (T/P91), A387Cr, 91 et aliae structurae ferro repugnante.
Compositio chemica metallici solidi (%):
| C | Mn | Si | Cr | Mo | V | Ni |
| 0.08 ~ 0.13 | ≤1.20 | ≤0.30 | 8.0 ~ 10.5 | 0.85 ~ 1.20 | 0.15 ~ 0.30 | ≤0.80 |
| Nb | Cu | Al | N | S | P |
|
| 0.02 ~ 0.10 | ≤0.25 | ≤0.04 | 0.02 ~ 0.07 | ≤0.01 | ≤0.01 |
|
Animadverte: Mn+Ni＜1.5%
Mechanica metallorum congeries;
| Test item | Distrahentes fortitudo Mpa | Cedat imperium Mpa | Prolongatio % |
| guaranteed | ≥620 | ≥530 | ≥17 |
Commendatur current:
| Rod diam mm） | 2.5 | 3.2 | 4.0 | 5.0 |
| Welding Current A） | 60 ~ 90 | 90 ~ 120 | 130 ~ 170 | 170 ~ 210 |
Animadverte:
1. Electrodum coquendum est per 1 horae 350℃ ante operationem glutinum;
2. Essentiale est mundare ferruginem, squamam olei, aquam et immunditias in partibus glutino ante glutino.
3. Preheat partem pactionem ad CC~ 260°C ante glutinosam, et temperatam interpassum debitam servet;
4. Tarde frigus ad 80~ 100°C pro 2 horis post glutino;si calor quam primum curatio fieri non potest, curatio siccitatis perfici potest ad CCCL°CX 2h.
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