AWS : N/A

Length : 350mm

Packing : 5kg/tube

APPLICATIONS:

Hard surfacing of shovel teeth, cutter knives of dredger and speed mullers, etc.

DESCRIPTION:

NHF-950 obtain a weld metal which contains large quantity of dispersed tungsten carbide and withstands heavy soil impact-free abrasion. Machining as-welded condition is impossible.

NOTES ON USAGE:

• Usually over 200ºC preheating and 500~600ºC postheating are required.

• Take care of the increase of cracking tendency when used for over triplelayer welding.

• Underlaying with low hydrogen type electrodes (N-7016 or N-18) is required.

• Dry the electrodes at 150~200ºC for 30~60 minutes before use

TYPICAL CHEMICAL COMPOSITION OF WELD METAL (%)

C: 2.78

Si: 0.29

Mn: 3.22

Cr: 0.10

Mo: 0.12

W: 47.30

HARDNESS OF WELD METAL: 60-69 HRC (700-950 Hv)

WELDING POSITIONS: Flat, Fillet, Vertical up, Horizontal, Overhead