300系列的铬钢中，任何系列都含有17%或更多的经处理或焊接的铬，这些铬钢在使用前应钝化，并且在钝化前要做适当的清洁。
Any 300 series chromium steels containing 17% or more chromium that has been handled, welded, or worked should be passivated prior to service and suitably cleaned prior to passivation.
模具中的大型烧焊件必须在配合面上进行加工并用螺丝所在一起，在最终加工前必须焊接及处理。
Large weldments in die structure will be machined on the mating surfaces, screwed together, welded, and normalized before final machining.
采用合理的焊前表面处理工艺、全熔透焊接可获得无气孔的焊缝。
The weld can performed free of porosity for full penetration weld when proper surface treatment processing prior to welding is employed.
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