question

By CBISTEEL Date 01-15-2006 18:36

What is charpy v notch i just bought two new lincon gas welders 305 amp. and it talked about it ino the specs. i also bought 2 ln-25 does it apply to there welds to.i do mostly structural steel welding

By jwright650 (*****)

Date 01-16-2006 00:40

Charpy V-notch is referring to the mechanical properties of either the base material or weld material in the as welded condition.
John Wright

By fbrieden (***)

Date 01-16-2006 01:12

Mr. Wright,
Isn't Charpy V-notch particular to the impact properties of a material/weld at a certain temperature?
Fran Brieden

By jwright650 (*****)

Date 01-16-2006 01:21

Yes, but I didn't want to get too technical due to the way the question was asked. It is measured in ft/lbs @ a given temperature (usually at 0F or -20F).
John Wright

edit: This is very important information when dealing with Seismic Welded Connections. FEMA 350 spells out the minimums that the materials need to meet. The job specs should indicate what values the engineer wants, this is usually decided by whether or not the structure will be heated or conditioned while in service.