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Electrodes for Creep Resisting Steels
CROMOTHERME-12
EN ISO CODE: 3580-A E CrMoWV12 B42
Cromotherme-12 is a lime-fluoride type electrode yielding a deposit containing 11Cr - 0.5Ni - 1.0Mo - 0.3V - 0.5W. The weld metal has excellent creep and oxidation resistant properties up to 700 C. The electrode is used for welding creep resistant 12Cr steels in turbines, steam boilers and chemical plant, where operating otemperatures of the order of 600 C are encountered. Following are some of the creep-resistant steels that can be welded.
DIN: X 20 Cr Mo 12 1, X 22 Cr Mo V 12 1 , X 20 Cr Mo W V 12 1, G X 22 Cr Mo MV 12 1
Precaution
1. Re-dry the electrodes at 250-300 C for one hour, as per our standard recommended practice.
2. Use short arc and stringer bead.
CHEMICAL COMPOSITION OF ALL WELD METAL (%)
| Element | C | Mn | Si | S | P | Cr | Mo | Ni | V | W |
| Percent | 0.18 | 0.90 | 0.40 | 0.020 | 0.020 | 11.0 | 1.00 | 0.50 | 0.30 | 0.50 |
MECHANICAL PROPERTIES OF ALL WELD METAL
(PWHT : 740°C-780°C FOR 2 HR)
| UTS | YS | Elongation | CVN Impact at minus (J) |
| (MPa) | (MPa) | (L= 5d)% | 24°C |
| 730 | 660 | 18 | 50 |
CURRENT AND PACKING DATA: DC (+)
| Size (mm) | 5x350 | 4x350 | 3.15x350 | 2.5x350 |
| Current Range (Amps) | 180-240 | 140-180 | 100-140 | 70-90 |
| Qty. (Pcs./Carton) | 35 | 55 | 75 | 125 |
Electrodes for Creep Resisting Steels
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