Welding an unknown material

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Hey guys,Fun little project, a brass/bronze fitting rolled into the shop, and I couldn't for the life of me braze it!One of the valve crew snapped it off with an extra long pipe wrench trying to "exercise the valve"I preheated and used a CuSi rod, welded her up and am currently cleaning it up on the latheI ran two beads with this rod on both known brass and bronze and did a destructive test, brass held way better but the bronze took a few really hard smashes to break it offIts a bandaid until the new part comes in, whenever that might be! Miller Spoolmate 200 w/t S-52 WirefeederMM 211'09 Miller Trailblazer 302
Reply:Oilite? Bronzish self lurcating bushing material. Pilot bushings mostlyesab 260 multimasternew tech 150 invertorlincoln 140 cheapo
Reply:Gold ?
Reply:I'm going to guess that it's brass.  You can see a white-gray haze of smoke residue on the flange in the second photo.  My guess is this is zinc oxidizing and fuming off from the heat applied during brazing.I'm also going to guess this was a fatigue failure.  You can see the ratchet marks in the photos of the fracture surfaces.  You can also see the flange side fracture surface is two colors.  A darker, oxidized brass, and a bright brass.  The darker areas would be from exposure to air for a period of time before the part actually failed.  Looks like the fracture had progressed about half way through the thickness of the material before your workman twisted it off.  Might be a cast part, judging from the pores in the machined flats.Nice repair for having to work on a complete unknown.Last edited by A_DAB_will_do; 04-14-2015 at 03:39 PM.Benson's Mobile Welding - Dayton, OH metro area - AWS Certified Welding Inspector
Reply:Originally Posted by A_DAB_will_doI'm going to guess that it's brass.  You can see a white-gray haze of smoke residue on the flange in the second photo.  My guess is this is zinc oxidizing and fuming off from the heat applied during brazing.I'm also going to guess this was a fatigue failure.  You can see the ratchet marks in the photos of the fracture surfaces.  You can also see the flange side fracture surface is two colors.  A darker, oxidized brass, and a bright brass.  The darker areas would be from exposure to air for a period of time before the part actually failed.  Looks like the fracture had progressed about half way through the thickness of the material before your workman twisted it off.  Might be a cast part, judging from the pores in the machined flats.Nice repair for having to work on a complete unknown.
Reply:WHAT! no after pic, now that's just rude. lol. glad it came out right though.There are no problems. There are only solutions. It's your duty to determine the right one.Hobart Handler 210Airco 225 Amp MSM Stinger
Reply:Originally Posted by ThorsHammerWHAT! no after pic, now that's just rude. lol. glad it came out right though.