oven temperature

[jniolon]

got a good deal on a rod oven... free...

now I've got all my 6011s and 6012 and 7018 and such all warm and toasting...

the thermostat has temps from 100° up to about 300° (boy, I could bake bisquits !!)

what is the best average temp to maintain on my rods???.. we don't do much x-ray certification in my home garage I just want to keep them dry and useable..

thanks

john

[Sberry]

Keep the 7018 in the oven at 300 and keep the others on the shelf dry somewhere.

[jgor]

jniolon,

Your note about the biscuits reminded me of a movie my welding instructor showed us about the construction of the Alaskan pipeline. It seems that the guys in one of the repair shops used their oven for heating their meals.

Maybe someone should wite a book about cooking with welding equipment! Cooking things in your oven, turn your OA torch into a griddle heat source, etc.

John

[Mike Sherman]

sberry is correct, keep only your low hydrogen in the oven. 250 - 300 degrees F.

[Sberry]

At a nuke I worked on we would short out the remote welding machines and cook on them all the time. You could adjust the heat by turning the amp control. We made little sheet metal ovens to put on them. Or a couple seconds to reheat coffee in a soup can with the torch, or another one was knock the flux of a rod or get a piece of copper wire and short it out with he welder and stick in the coffee to heat it right in the cup. And newbies dont even really know how we kept beer cold,,, haha

[Stu Bass]

rod oven

jniolon: Work with exray and guided bend testing all the time. We open new cans of 7018 cook at 350-400, about 3hrs. then turn to 125-150 degrees lasts forever. To hot of oven sometimes the flux gets flaky&brittle. The 60 series room temp should be fine as long as it don't get wet, and discolors the flux. Stu

[Mike Sherman]

Stu, if you are keeping your lo-hy rod oven at 150 deg. F you are not in compliance with D1.1/D1.1M:2000, see section 5.3.2.1, 5.3.2.2, 5.3.2.3, 5.3.2.4 and table 5.1

[Sberry]

They must have improved the fluxes, when i was going to school the recomend was 300 storage and 800 rebake. I see from a tech site that is 250 to 300 and only 500 or 550 for 3 or 4 hrs. The focus on moisture is on Xray work or heavy weldments but I think even on mild steel in single pass there can be gas pressure effected zone underbead where cracks are created and when subjected to repeated stress often let go. With 6010 you can see ultimate failures where it has just ripped the weld out but no underbead cracking. I think that big convex beads add to the problem. You get a little work or stress crack next to the edge of the bead and it follows it all the way thru.

[Stu Bass]

oven temp

Originally posted by Mike Sherman
Stu, if you are keeping your lo-hy rod oven at 150 deg. F you are not in compliance with D1.1/D1.1M:2000, see section 5.3.2.1, 5.3.2.2, 5.3.2.3, 5.3.2.4 and table 5.1

Mike: I agree with what you are saying.I checked my aws book. It says 250 for holding oven 7018 4hrs. atmospheric exposure. Used to keep our rod between 250-300,and we got fingernailing and flux popping off when left in the oven for a couple wks. Thought was bad rod. We keep linc. and chemtron in the ovens and both did the same thing. Although the linc. wasn't quite as bad as the other. opened new can, fresh from box, problem solved. I know it must be kept dry ,so my partner and I decided try 150 haven't any problem since. This is shop invirement. Out in the field yes 250. Home hoby long term storage I can't really see that much need for so much heat after the problems I've had. Probably use less elect. to. What is the recondition spec. on 7018? I don't have any idea what that is. My last welding book I can find is aws welding handbook volume 4 ,7th edition maybe it's out dated by now. Gotta be 30yr anyway. Thanks Stu