Re: 7018 storage
Posted: Sun Jun 04, 2017 12:27 pm
hello ,
great boxes you have there, I never seen of that sort,
I did exchange with a formula engineer from a well known electrode maker (selectarc, I am in France)
He told me that 7018 type accept to be cooked at 662 F for 30 hours , that mean about 15 cookings without degradation.
but also, if they took a little humidity but you do non critical weld , a gentle drying can be done as one hour at 212 F
adding small pouches of sillicate is a good solution (it keep air moisture at approx 16% humidity , it is really low) BUT ,
one need to buy sillicate bags with colored crystals , that shows you the crystals did take their maximum moisture (about half their weight) and need to be cooked (along with electrodes could be an option I think)
If not , you do not know when the bag is full of moisture and if the electrodes touch it they will get moisture , somewhat counterproductive indeed
another information I did obtain, is that all the 'all positions including descending' electrodes, contain a good percentage of cellulose in the coating (even some 6013 or 6012 )
they can be gently dried if necessary but the cellulose is degraded at about 600 F your electrodes will not burn with a good gaz shield then.
cellulose, mean a paste, or wood flour, or may be paper (I did read that on Lincoln web site)
when it burns it generate hydrogen so obviously you will have zero cellulose in the low hydrogen rods .
Best regards from France, I hope you did get some info
Here is a cooking drying table but all in French with celsius temp.
https://drive.google.com/file/d/0B6GjQD ... sp=sharing
you can see that some electrodes get 3 times less heat than the low hydrogen or some stainless types,
and that a stronger cooking can be applied when welding stainless steel with 6013 or 'acid' electrodes (widely used here in mixed types as cellulosic and acid, or low hydrogen and acid)
so one need to be sure he is not using electrodes all positions then, as the proposed heat is about 480- 572F for one hour.
great boxes you have there, I never seen of that sort,
I did exchange with a formula engineer from a well known electrode maker (selectarc, I am in France)
He told me that 7018 type accept to be cooked at 662 F for 30 hours , that mean about 15 cookings without degradation.
but also, if they took a little humidity but you do non critical weld , a gentle drying can be done as one hour at 212 F
adding small pouches of sillicate is a good solution (it keep air moisture at approx 16% humidity , it is really low) BUT ,
one need to buy sillicate bags with colored crystals , that shows you the crystals did take their maximum moisture (about half their weight) and need to be cooked (along with electrodes could be an option I think)
If not , you do not know when the bag is full of moisture and if the electrodes touch it they will get moisture , somewhat counterproductive indeed
another information I did obtain, is that all the 'all positions including descending' electrodes, contain a good percentage of cellulose in the coating (even some 6013 or 6012 )
they can be gently dried if necessary but the cellulose is degraded at about 600 F your electrodes will not burn with a good gaz shield then.
cellulose, mean a paste, or wood flour, or may be paper (I did read that on Lincoln web site)
when it burns it generate hydrogen so obviously you will have zero cellulose in the low hydrogen rods .
Best regards from France, I hope you did get some info
Here is a cooking drying table but all in French with celsius temp.
https://drive.google.com/file/d/0B6GjQD ... sp=sharing
you can see that some electrodes get 3 times less heat than the low hydrogen or some stainless types,
and that a stronger cooking can be applied when welding stainless steel with 6013 or 'acid' electrodes (widely used here in mixed types as cellulosic and acid, or low hydrogen and acid)
so one need to be sure he is not using electrodes all positions then, as the proposed heat is about 480- 572F for one hour.