71M

Date 04-22-2006 04:17

HELLO EVERYONE.

ER 71-M

I WORK FOR A HEAVE EQUITMENT CO. JHONSON MASHINERY.
AND AT WORK I LIKE TO WEAVE TO GET THE STACKED DIME LOOK IN MY WELD BEADS. IT ALLSO LOOKS BETTER.
IM TOLD THAT THIS IS A BAD HABIT AND THAT DOING SO WEAKENS THE WELD METAL. AND HAS A HIGHER POTENTIAL FOR CRAKING. AND THAT I SHUOLD USE THE DRAG TECHNIC.
I DONT SEE HOW WEEVING WOULD WEAKEN ANYTHING. I THINK THAT WEAVING OR DRAGING IS ONLY A MATER OF PREFRANCE.

DOES ANY ONE KNOW WHAT THE PROPER TECHNIC.

By ajoy

Date 04-23-2006 10:15

Theoretically weaving results in a higher heat input in the weld. A high heat input weld will have comparatively coarser grains than that welded with low heat input for the same material composition.

Coarser grains have compartively lower grain boundary lengths and consequently the toughness would be reduced.

However, limited weaving upto bead widths of 12 mm to 14 mm is acceptable in GMAW process for carbon steel applications.