HOUGHTO-QUENCH G quenching oil is suitable for various sealed and open quenching oil tanks. Including sealed box carburizing, carbonitriding furnace (i.e. multi-purpose furnace), continuous carburizing and quenching furnace, shaking hearth furnace, rolling furnace, continuous mesh belt/caterpillar conveyor, cast chain plate conveyor furnace and vacuum quenching Furnace and so on. The workpiece heated by pit gas carburizing furnace, fluid particle furnace and salt bath furnace can also be cooled by HOUGHTO-QUENCH G quenching oil, the oil quality is stable and lasting. The surface of the workpiece is clean and bright.