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For Stainless Steels Alloys

LoTherme-444L

AWS: SFA

EN ISO CODE:

Martensitic Stainless Steel Electrode with High Strength for increased resistance to cavitation erosion.

Approvals

Characteristics

LoTherme-444L especially designed for the fabrication and repair welding of hydro turbine components made of soft martensitic SS 13%Cr - 4%Ni alloyed steels and cast steel. Suitable for reclamations of ASTM CA6NM casting, Continuous Casting Rolls, etc.

Applications

LoTherme-444L is well suited welding electrode for joining and building up on corrosion resistant martensitic Cr - Ni steels and the corresponding cast steels. The welding deposit has an increased resistance against cavitations and erosion also at working temperatures up to 350°C.

Typical Mechanical Properties Of All Weld Metal

Ultimate Tensile Strength : 775 MPa

Elongation (L=4d) : 17%

Weld Metal Hardness : 330-400 BHN

CVN Impact Strength at RT : 60 Joules

Welding Technique

Weld the electrode slightly inclined with a short arc. Re-dry 2-3 hours at 250-300°C. For wall thickness more than 10mm, preheating base metal to 150°C is recommended.

Current Conditions : DC (+) /AC

Size (mm)

Dia x Length

5x350

4x350

3.15x350

2.5x350

Current Range (Amps)

150-180

110-150

80-110

60-90