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 temperatures 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. Ensure the electrodes are dry. Re-dry the electrodes at 300 C for 2 hours.

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 Strength
(MPa)	(MPa)	(L= 5d)%	At +20oC (Joules)
730	660	18	50

CURRENT AND PACKING DATA: DC (+)

Size (mm)	5x350	4x350	3.15x350	2.5x350
Current Range (Amps)	180-220	140-180	100-140	70-90
Qty. (Pcs./Carton)	35	55	75	125