TM 9-2350-277-20-4REPAIR HULL BY WELDING — Continued 0529 00MAGNESIUM CASTINGSWARNINGMagnesium may catch on fire if welded on or exposed to high temperatures. Do not weld onmagnesium castings or expose them to high temperatures.1. Welding on fan magnesium castings is not authorized. Do not attempt to weld on these parts.WARNINGFine particles of magnesium can catch fire and burn you. Be very careful when filing orgrinding on magnesium. Use grinding equipment marked FOR MAGNESIUM GRINDINGONLY. Keep a Class D fire extinguisher nearby.2. You must observe the following safety precautions when filing or grinding on magnesium:a. Use grinding equipment marked FOR MAGNESIUM GRINDING ONLY.b. Use a suitable coolant when grinding magnesium to keep temperatures below ignition point.c. Keep tools used on magnesium sharp.WARNINGWater and foam-type fire extinguishers will cause magnesium fires to flare up. Use a Class Dfire extinguisher or a sodium chloride base dry powder to fight magnesium fires.d. Keep a Class D fire extinguisher nearby for use on magnesium fires.e. Wear outer clothing of fire retardant cloth or leather. Brush clothing often to remove magnesium particles.f. Clean work area often. Do not let magnesium particles build up.0529 00-2
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