Print

[mlappin]

You guys that have repaired 409, any need to preheat or anneal when finished?

Can’t find it know but came across some data that recommended preheating/annealing 409, of course they could have been referring to the manufacturing of car exhausts where the temperature fluctuations are much greater.

[shepherd boy]

I am no pro so someone else can give you better advice, but last I used was 308L trimix gas(90%heilum, 7.5%argon, 2.5%carbon dioxide). Never worried about preheating etc. But again I'm not a pro.

[heat550]

You guys that have repaired 409, any need to preheat or anneal when finished?

Can’t find it know but came across some data that recommended preheating/annealing 409, of course they could have been referring to the manufacturing of car exhausts where the temperature fluctuations are much greater.

Something crazy my suitcase style Lincoln 175 plus 220amp says it can weld stainless 409 10 gauge with 308 wire states on there website .  I'm sure 309 309l work also 98 argon/ 2 % oxygen . its a mig welder . Now find someone that's tried it .  Not a word about preheat . But im still researching.

Heat550

[heat550]

... has anyone else cracked the 200 cord oak threshold.

The old mans stove is only about 4 years old and his usade is has been as follows:
2012 - 10 cords (only heating detached 4000sf garge)
2013 - 12 cords (only heating detached 4000sf garge)
2014 - 23 cords (Heating house and garage, and burning a ton of junky poplar and birch, and super cold here in MN last year)
2015 - 16 cords (Addded a side arm heater, so fire will never go out now)

I am thinking he will get to the 200 cord mark soon enough

your on your way  

Heat550

[mlappin]

You guys that have repaired 409, any need to preheat or anneal when finished?

Can’t find it know but came across some data that recommended preheating/annealing 409, of course they could have been referring to the manufacturing of car exhausts where the temperature fluctuations are much greater.

Something crazy my suitcase style Lincoln 175 plus 220amp says it can weld stainless 409 10 gauge with 308 wire states on there website .  I'm sure 309 309l work also 98 argon/ 2 % oxygen . its a mig welder . Now find someone that's tried it .  Not a word about preheat . But im still researching.

Heat550

Like I said, came across it once where it said preheating/annealing was the recommended way to weld 409, haven’t seen it since either. I didn’t do that on the 409 tubing I used in my waste oil boiler, but I also used a $23/pound wire that was for joining 409 to dissimilar stainless or mild steel.

[WB Guy]

I have only used 309stick in the field to weld 409 but in the shop i would use 309 wire in a mig as long as it is acontroled environment. ie no wind.

[heat550]

You guys that have repaired 409, any need to preheat or anneal when finished?

Can’t find it know but came across some data that recommended preheating/annealing 409, of course they could have been referring to the manufacturing of car exhausts where the temperature fluctuations are much greater.

Something crazy my suitcase style Lincoln 175 plus 220amp says it can weld stainless 409 10 gauge with 308 wire states on there website .  I'm sure 309 309l work also 98 argon/ 2 % oxygen . its a mig welder . Now find someone that's tried it .  Not a word about preheat . But im still researching.

Heat550

Like I said, came across it once where it said preheating/annealing was the recommended way to weld 409, haven’t seen it since either. I didn’t do that on the 409 tubing I used in my waste oil boiler, but I also used a $23/pound wire that was for joining 409 to dissimilar stainless or mild steel.

Came across this local guy that welds stainless . 
Have you ever heard if welds gets to hot it burns the nickle out and it basically turns them hot spots to mild steel ?
might be why if they fail its always at a weld joint .   

Heat550

[heat550]

I have only used 309stick in the field to weld 409 but in the shop i would use 309 wire in a mig as long as it is acontroled environment. ie no wind.

Came across this local guy that welds stainless . 
Have you ever heard if welds gets to hot it burns the nickle out and it basically turns them hot spots to mild steel ?
might be why if they fail its always at a weld joint .   

Heat550

[WB Guy]

I have not heard that ?? I will ask some of the mill guys I know and see if that could be the case .. thanks