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GB/T 5159-2025: Metallic powders, excluding powders for hardmetals - Determination of dimensional changes associated with compacting and sintering
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Std ID	Version	USD	Buy	Deliver [PDF] in	Title (Description)
GB/T 5159-2025	English	234	Add to Cart	3 days [Need to translate]	Metallic powders, excluding powders for hardmetals - Determination of dimensional changes associated with compacting and sintering
GB/T 5159-2015	English	214	Add to Cart	3 days [Need to translate]	Metallic powders, excluding powders for hard metals -- Determination of dimensional changes associated with compacting and sintering
GB/T 5159-1985	English	199	Add to Cart	3 days [Need to translate]	Metallic powders, excluding powders for hardmetals. Determination of dimensional changes associated with compacting and sintering

GB/T 5159-2025: Metallic powders, excluding powders for hardmetals - Determination of dimensional changes associated with compacting and sintering

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ICS 77.160 CCSH70 National Standards of the People's Republic of China Replaces GB/T 5159-2015 Metal powders (excluding powders for cemented carbide) Dimensional changes related to forming and sintering Determination methods (ISO 4492.2017, IDT) Published on 2025-10-31 Implemented on May 1, 2026 State Administration for Market Regulation The State Administration for Standardization issued a statement.

Foreword

This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1.Structure and Drafting Rules of Standardization Documents". Drafting. This document replaces GB/T 5159-2015 "Dimensional Variations in Metal Powders (excluding cemented carbide powders) Related to Forming and Sintering". The "Determination Methods" for [specific components] has undergone the following major technical changes compared to GB/T 5159-2015, in addition to structural adjustments and editorial modifications. a) The structure, dimensions, and dimensional tolerances of the upper and lower die punches in Figure 1 were modified, and the dimensional tolerances of the upper and lower die punches in Figure 2 were modified (see 7.1,.2015). (6.1 of the.2018 edition) b) The precision of the balance was changed to 0.001g (see 7.3, 6.3 in the.2015 edition); c) The precision of the "micrometer" has been changed to 0.005 mm (see 7.4, 6.4 in the.2015 edition); d) Added "The test powder to be pressed shall be tested in the receiving state" (see 9.1). This document is equivalent to ISO 4492.2017 "Metal powders (excluding powders for cemented carbide) – Dimensional variations in relation to forming and sintering". Determination methods for chemical substances. Please note that some content in this document may involve patents. The issuing organization of this document assumes no responsibility for identifying patents. This document was proposed by the China Nonferrous Metals Industry Association. This document is under the jurisdiction of the National Technical Committee on Standardization of Nonferrous Metals (SAC/TC243). This document was drafted by. Western Power Technology Co., Ltd., Northwest Nonferrous Metals Research Institute, China Iron & Steel Research Institute Co., Ltd., and Beijing... University of Science and Technology of China, Beijing Steel Research Institute Gaona Technology Co., Ltd. The main drafters of this document are. Liu Gaojian, Li Rong, Pu Bowen, Li Laiping, Li Aijun, Liu Yanning, Yi Feng, and Luo Zhiqiang. This document was first published in 1985, revised for the first time in.2015, and this is the second revision. Metal powders (excluding powders for cemented carbide) Dimensional changes related to forming and sintering Determination methods

1 Scope

This document specifies the dimensional changes related to forming and sintering after sintering metal powder and reference powder under the same conditions. Determination methods (see Chapter 4). This document applies to the determination of three dimensional changes in metal powders (excluding cemented carbide powders) during the forming and sintering processes.

2 Normative references

The contents of the following documents, through normative references within the text, constitute essential provisions of this document. Dated citations are not included. For references to documents, only the version corresponding to that date applies to this document; for undated references, the latest version (including all amendments) applies. This document. hardmetals - Tensiletestpieces) Note. GB/T 7963-2015 Sintered metallic materials (excluding cemented carbides) - Tensile test specimens (ISO 2740.2009, IDT)

3 Terms and Definitions

This document does not contain any terms or definitions that need to be defined. 4.Principles Metal powder, or metal powder mixed with lubricant, is pressed into a sample and sintered under specified conditions. The mold cavity dimensions and the pressed blank are measured. Dimensions and/or post-sintering specimen dimensions, calculate the required dimensional changes. Differences between these different measurements are expressed as mold cavity dimensions. Or, calculate the percentage of the compact size (see Chapter 9). Standard samples made from reference batch powder and samples made from test powder were tested together to obtain the dimensional change values of the two powders (the latter being...). His information can be found in Appendix A).

5 Test Parameters

The reference powder should be selected through consultation between the supplier and the buyer, and should have a composition and properties similar to the test powder. This document covers the following three dimensional variations. 5.1 From mold cavity size to blank size (elastic aftereffect). The increase in blank size in the direction perpendicular to the pressing direction after the blank is removed from the mold. 5.2 From compact size to sintered size (sintered size change). The change in sample size caused by sintering. 5.3 From mold cavity size to sintering size (total size change). ...