The majority of the structural components produced by fixed die pressing are iron-based. The powders are elemental, pre-alloyed, or partially alloyed.

大多数用固定模压制的结构件都是铁基的。粉末可以是单一元素、预先合金或部分合金。

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Elemental composition can vary within the same copper-ore lode, usually because of varying admixtures of other elements, especially iron, lead, zinc, and arsenic.

即使在同一铜矿矿脉中，元素构成也会发生差异，这一般是因为其它元素，尤其是铁、铅、锡、和砷等程度不同的混合。

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Iron has long been known to be an effective catalyst for the oxidation of H2S to elemental sulfur.

一直以来铁被认为是氧化h2s成为单质硫的有效催化剂。

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