Because the high temperature strength of the ferrite stainless steel is low, the breadth of the slab made from the vertical-arc continuous casting machine do not reach tolerance.

铁素体不锈钢由于高温强度低，直弧型连铸机生产的板坯宽度尺寸难以满足公差要求。

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It points that the lead tolerance in molten iron should be under 0.0008% if the reject rate is controlled under 0.5% in casting the complicated engine cylinders.

指出在生产这类复杂零件时，要将缸体渗漏废品率控制在0.5%以下时，铁液中铅的含量要控制在0.0008%以下。

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