GB/T 5235-2021Designation and chemical composition of wrought nickel and nickel alloy (English PDF)

Foreword

This document was drafted in accordance with the rules given in GB/T 1.1-2020 "Directives for standardization - Part 1: Rules for the structure and drafting of standardizing documents".

This document replaces GB/T 5235-2007 "Wrought nickel and nickel alloys - Chemical composition and forms of wrought products". Compared with GB/T 5235-2007, in addition to the structural and editorial changes, the main technical changes in this document are as follows:

a) Delete examples, names and groups of product shape (see Table 1 of Edition 2007);

b) Add the category of alloy designations; Add 24 designations of nickel-based superalloys and corrosion-resistant alloys (see Table 1 and Table A.1 of this Edition).

1 Scope

This document specifies the designation and chemical composition of wrought nickel and nickel alloy.

This document applies to nickel and nickel alloy products produced by press working and to ingots and billets used therefor.

2 Normative references

There are no normative references in this document.

3 Terms and definitions

There are no terms and definitions that need to be defined in this document.

4 Designation and chemical composition

4.1 The designations and chemical compositions of nickel and nickel alloys shall comply with the requirements in Table 1.

4.2 The content of each element in "chemical composition (mass fraction)" in Table 1 is in the range of matrix element or alloy element. If the element content is a single value, except for Ni+Co which is the minimum limit, the others are the maximum limit.

When the Co content is not specified, its content is allowed to be no more than 1.5%, which is counted as the nickel content. The elements corresponding to " - " in Table 1 shall not be tested unless there are special requirements.

4.3 The mass fraction of the allowance in Table 1 is the difference between 100% and the sum of all clearly required element contents in the table.

4.4 The sum of impurities in Table 1 is the sum of the measured values of non-matrix elements and non-alloy elements listed in the table.

4.5 For the comparison of the nickel and nickel alloy designations included in this document with the corresponding designations in domestic and foreign standards, see Annex A. […]