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GB/T 3074.1-2008 PDF in English


GB/T 3074.1-2008 (GB/T3074.1-2008, GBT 3074.1-2008, GBT3074.1-2008)
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GB/T 3074.1-2008: PDF in English (GBT 3074.1-2008)

GB/T 3074.1-2008
ICS 29.050
Q 51
GB
National Standard
of the People’s Republic of China
Replacing GB/T 3074.1-1982
Method for the determination of the flexure
strength of graphite electrodes
ISSUED ON. MAY 13, 2008
IMPLEMENTED ON. NOVEMBER 1, 2008
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine;
Standardization Administration Committee.
Table of Contents
Foreword ... 3
1 Scope ... 5
2 Normative references ... 5
3 Principle ... 5
4 Instruments & equipment ... 6
5 Samples ... 7
6 Test procedure ... 7
7 Result calculation ... 7
8 Test report ... 8
Foreword
GB/T 3074 "Method for the determination of graphite electrodes" is divided into
5 parts.
- Method for the determination of the flexure strength of graphite electrodes;
- Method for the determination of the flexure strength of graphite electrodes;
- Method for the determination of the oxidation resistance of graphite
electrodes;
- Method for the determination of the coefficient of thermal expansion of
graphite electrodes;
- Method for sample preparation for the determination of the coefficient
thermal expansion (CTE) of petroleum coke for graphite electrodes.
This Part is Part 1 of GB/T 3074.
This Part replaces GB/T 3074.1-1982 "Determination of flexural strength of
graphite electrodes".
Compared with GB/T 3074.1-1982, the main changes of this Part are as
follows.
- ADD articles of scope, normative references, and principle;
- ADD measurement requirements for electrodes with specifications of
above Φ500 mm;
- DELETE article of definition;
- The flexural strength unit in calculation formula is changed to MPa.
This Part was proposed by China Iron and Steel Association.
This Part is under the jurisdiction of Metallurgical Industry Information
Standards Institute.
Drafting organization of this Part. Sinosteel Jilin Carbon Co., Ltd., and
Metallurgical Industry Information Standard Institute.
The main drafters of this Part. Zhu Lijuan, Kang Jian, and Sun Wei.
This Part was first released in 1982.
Method for the determination
of the flexure strength of graphite electrodes
1 Scope
This Part specifies the measurement principle, instruments & equipment,
samples, test procedure, and result calculation for flexure strength of graphite
electrodes.
This Part applies to the measurement of graphite electrodes’ flexure strength
at room temperature.
2 Normative references
The following documents contain provisions which, through reference in this
Standard, become provisions of this Standard. For dated references, their
subsequent amendments (excluding corrections) or revisions do not apply to
this Standard. However, the parties who enter into agreement based on this
Standard are encouraged to investigate whether the latest versions of these
documents are applicable. For undated reference documents, the latest
versions apply to this Standard.
GB/T 1427 Sample method of carbon material
GB/T 8170 Rules of rounding off for numerical values & expression and
judgement of limiting values
3 Principle
Flexure strength is a measure of the material that can withstand the maximum
load of the external forces bent. Its value is the normal stress on cross section,
when the sample is bent and fractured.
millimeter, mm.
d – Sample’s diameter, in unit of millimeter, mm.
Calculation result shall retain 1 decimal digit. The value shall be rounded
according to the provisions of GB/T 8170.
8 Test report
The test report shall include the following content.
a) Commissioned organization;
b) Sample name;
c) Sample identity;
d) Test result;
e) Test organization;
f) Test personnel;
g) Test date.
......
 
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.