Molytherme-H4R - E8018-D3
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Electrodes for Creep Resisting Steels

MOLYTHERME-H4R

AWS: SFA 5.5 E7018-A1 H4R

Molytherme-H4R is moisture resistant hydrogen controlled basic coated electrode depositing 0.5Mo weld metal of radiographic quality. The weld metal possesses excellent mechanical properties at room and at elevated temperature. It is ideally suited for welding C - 0.5Mo steels, plates, pipes for pressure vessels, boilers etc. The weld metal possesses good creep strength up to 525°C.

Precaution

1. Restrict the heat input, use short arc and stringer bead.

2. Re-dry the electrodes at 250°C for one hour, if expose to atmosphere.

TYPICAL CHEMICAL COMPOSITION OF ALL WELD METAL (%)


Element
CMnSiSPMo
Percent
0.060.600.400.0100.0120.55


TYPICAL MECHANICAL PROPERTIES OF ALL WELD METAL


UTSYSElongationCreep Strength at 525°C
(MPa)
(MPa)
(L= 4d)%(1% offset in 10,000 hrs)
53044030.0120 MPa



DIFFUSIBLE HYDROGEN CONTENT:

4.0 ml/100 gms of weld metal

MOISTURE AS CONDITIONED:

0.30 Max.

MOISTURE AS EXPOSED (80% RH, 27°C FOR 9 HRS):

0.40 Max.

ADVANTAGE:

Electrodes are Vacuum packed, no need of drying and can be used straight on the job.

CURRENT AND PACKING DATA : DC(+)


Size (mm)
5x4504x350
3.15x350
2.5x350
Current Range (Amps)
170-240140-170
90-120
70-90
Qty. (Pcs./Carton)
2222


Electrodes for Creep Resisting Steels
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