I just got a call from the guy I buy my compressed gasses from wanting me to weld up some cracks in a stove grate . I'm thinking plain phosphor bronxe filler might not take the heat , and am looking for opinions on what to use . Looks like my choices are Ni-99 , Ni-55 , silicon bronze . or cast iron filler . Will CI or SB require peening , like the nickel does ? Or is
the grate in/on firebricks to retain the heat while I work on it or possibly bury it in dry sand . Which would you use ? I do know that whatever I use it's going to need preheat and a slow cooldown . I'm thinking a nice wood fire should handle both since I don't have anything else to preheat a piece about 11 x 13 . He won't be bringing it for a couple of weeks , so I have time to order some filler as soon as I decide which to use .