ISO 185:2020 灰口铸铁 分类

标准编号：ISO 185:2020

中文名称：灰口铸铁 分类

英文名称：Grey cast irons — Classification

发布日期：2020-05

标准范围

1范围本文件规定了在砂型或具有类似热性能的模具中制造的铸件所用的非合金和低合金灰铸铁的性能。本文件规定了灰铸铁的以下特性:a） 铸造样品的抗拉强度；b） 如果制造商和买方同意，从铸件上切下的样品的抗拉强度；c） 如果制造商和买方达成一致，则为铸件或铸造旋钮上确定的材料硬度。如果制造商和买方同意，可指定选项a）或选项b）的抗拉强度和选项c）的硬度的组合。附录B中给出了有关规定抗拉强度和硬度组合的信息。本文件根据抗拉强度（见表1）规定了八个等级的灰铸铁，根据布氏硬度（见表2）规定了六个等级的灰色铸铁。本文件不适用于用于管道和管件以及连续铸造产品的灰铸铁。本文件不包括灰铸铁件的技术交货条件。注:ISO/TR 10809-1中提供了灰铸铁工程性能的一般信息。

1 Scope This document specifies the properties of unalloyed and low-alloyed grey cast irons used for castings that have been manufactured in sand moulds or in moulds with comparable thermal behaviour.This document specifies the characterizing properties of grey cast irons by any of the following:a) the tensile strength of cast samples;b) if agreed by the manufacturer and the purchaser, the tensile strength of samples cut from a casting;c) if agreed between the manufacturer and the purchaser, the hardness of the material determined on castings or on a cast-on knob.If agreed by the manufacturer and the purchaser, the combination of tensile strength from option a) or option b) and plus hardness from option c) can be specified. Information on specifying a combination of tensile strength and hardness is given in Annex B.This document specifies eight grades of grey cast iron according to tensile strength (see Table 1) and six grades of grey cast iron according to Brinell hardness (see Table 2).This document does not apply to grey cast irons used for pipes and pipe fittings and continuous cast products.This document does not cover technical delivery conditions for grey iron castings.NOTE General information on the engineering properties of grey cast irons is provided in ISO/TR 10809-1.

标准预览图