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GB/T 21182-2022Scraps of cemented carbide (English PDF)

硬质合金废料

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

October 14, 2022

Implementation date

May 1, 2023

Scope

GB/T 21182-2022 is the English-translated version of 硬质合金废料.

GB/T 21182-2022 is the Chinese national standard for scraps of cemented carbide, the recyclable residues and wastes containing tungsten and cobalt that arise when cemented carbide products are made and used.

It gives the classification of the scraps, the technical requirements for general condition, appearance quality and chemical composition, the test methods, the inspection rules and the provisions on marking, packaging, transport, storage, accompanying documents and order form.

Composition is measured by X-ray fluorescence for W, Co, Fe, Ni, Ti, Ta, Nb, V, Cr, Mn and Mo, and by the cited methods for total and free carbon, aluminium, silicon, calcium, magnesium and oxygen.

An informative annex shows reference pictures of conventional bulk scraps. It replaces GB/T 21182-2007, was issued on 14 October 2022 and has applied since 1 May 2023.

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Document preview — GB/T 21182-2022

National Standard of the People's Republic of China

ICS: 77.120
Classification: H 69
Replacing: GB/T 21182-2007

Issued by: State Administration for Market Regulation; Standardization Administration of the PRC

Foreword3
1 Scope4
2 Normative references4
3 Terms and definitions5
4 Classification5
5 Technical requirements6
6 Test methods7
7 Inspection rules7
8 Marking, packaging, transportation, storage and accompanying documents8
9 Order form content9
Appendix A (Informative) Reference pictures of conventional bulk scraps of cemented carbide10

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 21182-2007 Scraps of cemented carbide; compared with GB/T 21182-2007, in addition to structural adjustments and editorial changes, the main technical changes are as follows:

a) Change the scope of application (see Chapter 1; Chapter 1 of the 2007 edition);

b) Change some normative references (see Chapter 2; Chapter 2 of the 2007 edition);

c) Add instructions for classification (see Chapter 4);

d) Add "profiles" to the group of "conventional bulk scraps of cemented carbide", including four varieties of "bars", "boards", "tubes" and "micro-drills" (see Chapter 4);

e) Add the general requirements (see 5.1);

f) Add the requirements for appearance quality (see 5.2);

g) Change the requirements for chemical composition (see 5.3; 3.2 of the 2007 edition);

h) Change the sampling method (see 7.4; 5.4 of the 2007 edition).

1 Scope

This document specifies the classification, technical requirements, test methods, inspection rules, marking, packaging, transportation, storage, accompanying documents and order form for scraps of cemented carbide.

This document applies to the recyclable residues and wastes containing tungsten and cobalt generated during the production and use of cemented carbide products (hereinafter referred to as scraps of cemented carbide).

2 Normative references

The following documents are normatively referenced in this document and are indispensable for its application. For dated references, only the version corresponding to that date is applicable to this document; for undated references, the latest version (including all amendments) is applicable to this document.

GB/T 4324.11, Methods for chemical analysis of tungsten - Part 11: Determination of aluminum content - Inductively coupled plasma atomic emission spectrometry

GB/T 4324.12, Methods for chemical analysis of tungsten - Part 12: Determination of silicon content - Chlorination-molybdenum blue spectrophotometry

GB/T 5124.1, Methods for chemical analysis of hardmetals - Determination of total carbon content - Gravimetric method

GB/T 5124.2, Methods for chemical analysis of hardmetals - Determination of insoluble (free) carbon content - Gravimetric method

GB/T 5158 (all parts), Metallic powders - Determination of oxygen content by reduction methods

GB/T 5314, Powders for powder metallurgical purposes - Sampling

GB/T 20255.1, Methods for chemical analysis of hardmetals - Determination of calcium, potassium, magnesium and sodium contents - Flame atomic absorption spectrometric method

GB/T 26050, Hardmetals - Determination of contents of metallic elements by X-ray fluorescence - Fusion method

6 Test methods

6.1 General requirements

The general requirements for scraps of cemented carbide are visually inspected or measured with a measuring tool of corresponding precision.

6.2 Appearance quality

The appearance quality of scraps of cemented carbide is visually inspected.

6.3 Chemical composition

6.3.1 The detection of W, Co, Fe, Ni, Ti, Ta, Nb, V, Cr, Mn, Mo element content in the chemical composition of scraps of cemented carbide shall be carried out according to the provisions of GB/T 26050.

6.3.2 The detection of the total carbon content in the chemical composition of scraps of cemented carbide shall be carried out according to the provisions of GB/T 5124.1.

6.3.3 The detection of free carbon content in the chemical composition of scraps of cemented carbide shall be carried out according to the provisions of GB/T 5124.2.

6.3.4 The detection of Al element content in the chemical composition of scraps of cemented carbide shall be carried out according to the provisions of GB/T 4324.11.

6.3.5 The detection of Si element content in the chemical composition of scraps of cemented carbide shall be carried out according to the provisions of GB/T 4324.12.

6.3.6 The detection of Ca and Mg element content in the chemical composition of scraps of cemented carbide shall be carried out according to the provisions of GB/T 20255.1.

6.3.7 The detection of oxygen content in the chemical composition of scraps of cemented carbide shall be carried out according to the provisions of GB/T 5158 (all parts).

7 Inspection rules

7.1 Inspection and acceptance

7.1.1 Scraps of cemented carbide shall be inspected by the supplier or a third party, to ensure that the quality complies with the provisions of this document and the order form.

7.1.2 The buyer can inspect the received scraps of cemented carbide in accordance with the provisions of this document and the order form. If the inspection results are inconsistent with the provisions of this document and the order form, they shall be sealed separately, and submitted to the supplier within one month from the date of receipt, and negotiated by both parties.

7.2 Batch

Scraps of cemented carbide shall be submitted for acceptance in batches, and each batch shall consist of scraps of the same type and composition.

7.3 Inspection items

Each batch of scraps of cemented carbide shall be inspected for general requirements and appearance quality, as well as chemical composition when it is specified in the order form.

7.4 Sampling

The sampling for testing the chemical composition of scraps of cemented carbide shall be representative. Each batch of bulk scraps can be divided into 2 ~ 3 types according to the principle of similar appearance, shape and size. For each type, take one sample, which is about 100 g. For powder scraps, after mixing evenly, take 2 ~ 3 parts according to the provisions of GB/T 5314. If there are special requirements, it shall be determined by the supplier and the buyer through negotiation.

7.5 Determination of the test result

7.5.1 When the inspection result of the general requirements or the appearance quality of scraps of cemented carbide is unqualified, judge the batch of scraps as unqualified.

7.5.2 When the inspection result of chemical composition of scraps of cemented carbide is unqualified, double sampling is allowed for repeated inspection. If any result of the repeated inspection is unqualified, judge the batch of scraps as unqualified.

8 Marking, packaging, transportation, storage and accompanying documents

8.1 Marking

Each batch of scraps of cemented carbide shall be labeled and indicated with:

a) name of the supplier;

b) category, variety;

c) batch number;

d) weight. […]

......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.

Referenced standards

Normative references

GB/T 5158

Similar standards

GB/T 10267.1-2025|GB/T 10267.2-2025|GB/T 10267.4-2025|GB/T 10267.5-2025|GB/T 22660.1-2008|GB/T 22660.4-2008

Editions of GB/T 21182

Edition	Title	Revision	Status
GB/T 21182-2022	Scraps of cemented carbide	current edition	Current
GB/T 21182-2007	Scraps of cemented carbide	previous edition	Superseded

This page sells the current edition, GB/T 21182-2022. Earlier editions are listed for reference only.

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