Brazing Cast Iron?

[PavePogue]

Not so sure I would bother brazing it, put a ratchet strap around it to close up the gap and use countersunk bolts through the cast iron drum into steel straps on the inside.

Bob

Now thats an idea

 

[PavePogue]

When you have drilled the end use that as your start point for welding and work towards the edge, this will allow a little movement of the open end of the crack as the weld progresses and reduce the chance of it cracking while welding, make short runs say around an inch maximum and allow to cool between welds, do not quench it,
I wouldn't attempt to fully weld it, half a dozen short runs evenly spaced out will be good enough for that,

Paul, thank you for this advice. This is what I will do. I’ll go forward with this plan. I like it.

 

[PavePogue]

Can I get a suggestion on a nickel electrode?

 

[The_Yellow_Ardvark]

Can I get a suggestion on a nickel electrode?

Nip along to your local welding shop and tell them your machine and what you plan they will be able to advise.

 

[chris pruteanu]

I will tig weld it with copper rods/wire from a thick electric cable, it works wonders. I weld all sorts of critical cast iron parts with either monel 625 rods or copper wire then wash it with stainless steel tig rods... they hold well.

 

[PavePogue]

Nip along to your local welding shop and tell them your machine and what you plan they will be able to advise.

I’m not too sure I have s local welding shop. There might be one in Norwich, but you know...self isolation and all.

 

[The_Yellow_Ardvark]

I’m not too sure I have s local welding shop. There might be one in Norwich, but you know...self isolation and all.

Are you in a "At risk group"? If so wise move.

If not, are you showing symptoms?

It not you will be safe to go out doors.

 

[Bill Edwards]

It is vital that you get good rods.
Some rods are sold for welding cast iron but are useless. Don't get ones that are suitable for welding cast to steel as they will fail, you want proper cast iron to cast iron rods which have a high nickel content. I think they're something like £1.50/£2 per rod, quite pricey.

It's important that you keep it cool at all times, just weld an inch at a time then peen it (tap the weld metal with the chipping hammer which causes it to expand, very important to do this while it cools).

It's going to be a little tedious on a long crack like that but it's a very reliable method.

 

[PavePogue]

Are you in a "At risk group"? If so wise move.

If not, are you showing symptoms?

It not you will be safe to go out doors.

At risk group...Diabetes for me. Also my wife beat Stage 4 Hodgkin's Lymphoma and as a result of the cancer & chemo...she has a **** immune system. So, we’re riding it out.

 

[PavePogue]

It is vital that you get good rods.
Some rods are sold for welding cast iron but are useless. Don't get ones that are suitable for welding cast to steel as they will fail, you want proper cast iron to cast iron rods which have a high nickel content. I think they're something like £1.50/£2 per rod, quite pricey.

It's important that you keep it cool at all times, just weld an inch at a time then peen it (tap the weld metal with the chipping hammer which causes it to expand, very important to do this while it cools).

It's going to be a little tedious on a long crack like that but it's a very reliable method.

So the 99% Nickel rods?

 

[The_Yellow_Ardvark]

At risk group...Diabetes for me. Also my wife beat Stage 4 Hodgkin's Lymphoma and as a result of the cancer & chemo...she has a **** immune system. So, we’re riding it out.

Very wise.
The shop and the job will be there afterwards.

 

[Bill Edwards]

So the 99% Nickel rods?

To be honest I'm not able to tell you, I don't think they're all nickel but my knowledge is how to use them, not the science behind them. I go to my welding supplier who knows what is what and sell good quality gear and I can't advise you to do any different - but of course I understand that the present situation makes that rather difficult.

 

[Retired]

Hi,

I've a small brazing job to do and wondered if I could use my tig welder; looking for filler rods I found these on eBay;

20 X SILICON BRONZE C9 TIG BRAZING FILLER RODS 1.6MM X 300MM

AWS ERCuSi-A (CuSi3Mn1) C9

Copper rod containing 3% silicon and 1% manganese



TIG brazing filler rods for fusion welding metals of similar composition, copper alloys (brass) and TIG brazing steels. Ideal for joining dissimilar metals

CAN ALSO BE USED WITH OXYACETYLENE

I also bought 20 normal brazing rods for use with my canister blow torch; I don't know what difference there is between the two types of rod so it's a case of suck it and see.

Kind regards, Colin.

 

[outofthefire]

Hi,

I've a small brazing job to do and wondered if I could use my tig welder; looking for filler rods I found these on eBay;

20 X SILICON BRONZE C9 TIG BRAZING FILLER RODS 1.6MM X 300MM

AWS ERCuSi-A (CuSi3Mn1) C9

Copper rod containing 3% silicon and 1% manganese



TIG brazing filler rods for fusion welding metals of similar composition, copper alloys (brass) and TIG brazing steels. Ideal for joining dissimilar metals

CAN ALSO BE USED WITH OXYACETYLENE

I also bought 20 normal brazing rods for use with my canister blow torch; I don't know what difference there is between the two types of rod so it's a case of suck it and see.

Kind regards, Colin.

There's zinc in gas rods that's why they spit tig welding, it's like welding galv. There's also different types of gas rod for different applications though I can't tell you what the differences are or the applications.

 

[jordan1]

Are you in a "At risk group"? If so wise move.

If not, are you showing symptoms?

It not you will be safe to go out doors.

You can be a carrier without showing any symptoms.

 

[TheJay]

Sooooo, how did it go?