铸铁结构(The presence of other alloying elements also has an effect on the structure of cast iron; for example, chromium tends to produce a white cast iron and nickel to produce a grey one. 其他合金元素也会对铸铁结构产生影响，例如添加铬有助于生产白口铸铁，添加镍有助于生产灰铸铁。)
金属结构(The two cast irons contain 2.4 to 4.0 per cent of carbon but the difference lies in the condition in which the major portion of the carbon exists in the structure of the metal. 这两种铸铁都含有2.4% -4.0%的碳，但二者的大部分碳在金属结构中的存在状态却不相同。)
