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Welding & Fabrication Forum
Welding Cast Iron
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[QUOTE="Spectre32, post: 740247, member: 2478"] If you really want to weld it solid, you should really use Oxy Acetylene and a applicable filler material that would be suitable for the base metal and service applications. Pre and Post weld heating is a must but using a non arc welding process would help to keep the temperature fluxes not as severe. When you arc weld you create a highly non equilibrium state and by using the oxy/acc process you will more uniformity heat the parts up. Cooling rate is the other important side to that equation. Most of the time you can use a pure nickel rod (ERNi-Cl). The high nickel content allows for better contraction with out cracking when everything solidifies and then during subsequent post welding cooling. If the part is subject to some high stresses then the weld becomes much more critical and using a traditional arc welding process might not work. [/QUOTE]
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