GB/T 33370-2016 PDF English
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| GB/T 33370-2016 | English | 75 |
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The measuring method for copper and copper alloys soften temperature
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GB/T 33370-2016: The measuring method for copper and copper alloys soften temperature---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT33370-2016
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 77.040.99
H 13
GB/T 33370-2016
The measuring method for copper and copper alloys soften
temperature
Issued on: DECEMBER 30, 2016
Implemented on: NOVEMBER 01, 2017
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine of the People's Republic of China;
Standardization Administration of the People’s Republic of China.
Table of Contents
Foreword... 3
1 Scope... 4
2 Normative references... 4
3 Terms and definitions... 4
4 Method principle... 5
5 Instruments and equipment... 5
6 Test specimen... 5
7 Test steps... 6
8 Test method... 7
9 Test report... 8
Foreword
This Standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This Standard was proposed by China Nonferrous Metals Industry Association.
This Standard shall be under the jurisdiction of National Technical Committee on
Nonferrous Metals of Standardization Administration of China (SAC/TC 243).
Responsible drafting organizations of this Standard. China Aluminum Luoyang Copper
Co., Ltd., Heze Guangyuan Copper Belt Co., Ltd., Anhui Xinke New Materials Co.,
Ltd., Tongling Jinwei Copper Co., Ltd., National Copper and Aluminum Smelting and
Processing Product Quality Supervision and Inspection Center, Ningbo Xingye
Shengtai Group Co., Ltd., Anhui Chujiang Technology New Materials Co., Ltd.,
Taiyuan Jinxi Chunlei Copper Co., Ltd., Suzhou Nonferrous Metals Research Institute
Co., Ltd., Shaoxing Libo Electric Co., Ltd.
Main drafters of this standard. Lou Dongge, Li Xianghai, Wang Shidong, Wang Nan,
Jia Zhijun, Yu Liansheng, Gu Fengxian, Peng Zuohua, Ge Xiaoniu, Mao Yaodong, Liu
Qinglan, Chen Wei, Zheng Yun, Lin Yingbin, Meng Peiyi, Zhang Wenqin, Xu Gaolei.
The measuring method for copper and copper alloys soften
temperature
1 Scope
This standard specifies the terminology, test requirements, test steps, test methods and
test reports for the softening temperature determination method of copper and copper
alloys.
This standard is applicable to the determination of the softening temperature of copper
and copper alloy materials or products in a laboratory environment.
2 Normative references
The following referenced documents are indispensable for the application of this
document. For dated references, only the edition cited applies. For undated references,
the latest edition of the referenced document (including any amendments) applies.
GB/T 231.1 Metallic materials - Brinell hardness test - Part 1.Test method
GB/T 4340.1 Metallic materials - Vickers hardness test - Part 1.Test method
3 Terms and definitions
For the purpose of this document, the following terms and definitions apply.
3.1
soften temperature
The copper and copper alloy materials are taken out of the furnace after being kept
warm for 1 hour and naturally cooled to room temperature. The corresponding holding
temperature when the hardness drops to 80% of the original hardness.
Note. The softening temperature is a quantitative indicator for evaluating the high-
temperature softening resistance of alloy materials.
3.2
original hardness
The hardness of the original sample measured at room temperature.
3.3
soften temperature behavior curve
A curve used to reflect the high-temperature softening resistance of copper and copper
alloy materials, with the heating temperature as the horizontal axis and the
corresponding sample hardness as the vertical axis.
4 Method principle
Using an annealing furnace with corresponding accuracy, the copper and copper alloy
samples are annealed at different temperatures for a specified time of 1 hour. After the
annealing is completed, the hardness test is carried out together with the original sample.
The softening annealing curve is drawn with the holding temperature as the horizontal
axis and the hardness value as the vertical axis. Through the softening annealing curve,
it is determined that the holding temperature corresponding to the hardness dropping to
80% of the original hardness is the softening temperature of the sample.
5 Instruments and equipment
5.1 Annealing furnace
5.1.1 The accuracy of the annealing furnace shall not exceed ±0.5 ℃.
5.1.2 The temperature variation of the constant temperature zone in the annealing
furnace is less than 5 ℃.
5.2 Hardness tester
5.2.1 Vickers hardness tester.
5.2.2 Brinell hardness tester.
6 Test specimen
6.1 The material of the specimen shall be uniform and free of internal defects.
6.2 After the copper and copper alloy bars with a nominal outer diameter ≥15 mm are
subjected to insulation annealing, their Brinell hardness shall be measured to determine
the softening temperature of the material. After the copper and copper alloy bars with a
nominal outer diameter < 15 mm are subjected to insulation annealing, their Vickers
hardness shall be measured to determine the softening temperature of the material.
6.3 After the copper and copper alloy pipes with a nominal outer diameter ≥15 mm and
a wall thickness ≥4 mm are subjected to insulation annealing, their Brinell hardness
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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