GB/T 34217-2017Refractory products—Determination of torsion strength at elevated temperature (English PDF)
耐火材料 高温抗扭强度试验方法
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
September 7, 2017
Implementation date
August 1, 2018
Scope
GB/T 34217-2017 is the English-translated version of 耐火材料 高温抗扭强度试验方法.
GB/T 34217-2017 is the Chinese national test method for the torsion strength of refractory products at elevated temperature.
Clause 1 states that it specifies the terminology and definitions, the principle, the equipment, the samples, the test procedure, the calculation of results and the test report of the high temperature torsion strength test method for refractory materials, and that it applies to the determination of the high temperature torsion strength of refractories; no exclusion is stated.
The clauses shown on the page are 1 Scope, 2 Normative references, 3 Terms and definitions and 4 principle, and the draft breaks off in the middle of the sentence that states the principle, so the equipment, sample, procedure and report clauses announced in clause 1 are not shown in text.
Clause 2 cites GB/T 7321, GB/T 8170, GB/T 10325, GB/T 17617, GB/T 18930 and YB/T 5202.1.
Clause 3 takes the definitions of GB/T 18930 and adds four of its own: high temperature torsion strength, the ultimate shear stress the specimen withstands before failure when torque is applied at a specified loading rate at high temperature; torsion fracture temperature, the temperature at which the specimen ruptures under constant torque as the temperature rises, with the starting point of torsion angle deformation and the point of 20% torque reduction identified as T0 and T20; high temperature torsion creep; and torsion angle, the deformation angle from the beginning to the end of the test.
The introduction records a patent declaration covering 5.4, 5.5 and 5.6 of clause 5 and 7.3 and 7.5 of clause 7, with the patent holder named as Wuhan University of Science and Technology and stated to have undertaken to negotiate licences with any applicant on reasonable and non-discriminatory terms.
The standard is administered by the National Refractory Standardization Technical Committee (SAC/TC193). The page declares no replaced edition; it was issued on September 7, 2017 and has applied since August 1, 2018.
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Document preview — GB/T 34217-2017
National Standard of the People's Republic of China
- ICS
- 81.080
- Classification
- Q 40
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- Foreword
- Introduction
- 1 Scope
- 2 Normative references
- 3 Terms and definitions GB/T 18930 defined and the following
- 4 Principle
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
Introduction
The issuing authority of this document draws attention to the fact that statements that conform to this document may relate to Articles 5.4, 5.5 and 5.6 of Chapter 5 and 7.3, 7.5 of Chapter 7 Article related to the use of patents.
The issuing authority of this document has no position whatsoever about the truthfulness, validity and scope of this patent.
The patentee has assured the issuing authority of this document that he is willing to work with any applicant on reasonable and non-discriminatory terms and conditions, Negotiate a patent license. The patent holder's statement has been filed with the issuing authority of this document. Related information can be passed below Contact to get. Patent holder name. Wuhan University of Science and Technology.
1 Scope
This standard specifies the terminology and definitions, principles, equipment, samples, test procedures, the results of the test method of high temperature torsion strength of refractory materials Calculate and test report.
This standard applies to refractory high temperature torsion strength determination.
2 Normative references
The following documents for the application of this document is essential. For dated references, only the dated version applies to this document. For undated references, the latest edition (including all amendments) applies to this document.
GB/T 7321 shaped refractory products sample preparation method
GB/T 8170 rounded repair rules and limit values of the representation and judgment
GB/T 10325 Shaped refractory products acceptance inspection sampling rules
GB/T 17617 refractory raw materials and amorphous refractory samples
GB/T 18930 refractories terminology
YB/T 5202.1 amorphous refractory sample preparation methods - Part 1 refractory castables
3 Terms and definitions
GB/T 18930 defined and the following terms and definitions apply to this document.
3.1 High temperature torsion strength
At high temperatures, the sample is loaded at a specified rate of loading torque, the specimen can withstand the failure of the ultimate shear stress.
3.2 Torsion fracture temperature
Under constant torque, the temperature at which the specimen ruptures with increasing temperature. Torsion angle of deformation of the starting point of temperature (T0) and Torque reduction at 20% of the temperature (T20).
3.3 High temperature torsion creep
The torque or temperature at which the specimen is set, the angle of twist or breakage caused by the specimen during the holding process or within a certain period of time.
3.4 Torsion angle
Deformation angle from the beginning of the test to the end of the test.
4 Principle
At the set temperature, the specified size of the sample at a constant rate of torque until the fracture, that is, the sample can not afford to go further
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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 7321Sample preparation for testing of shaped refractory products
- GB/T 8170Rules of rounding off for numerical values & expression and judgement of limiting values
- GB/T 10325Shaped refractory products -- Rule of acceptance, sampling and inspection
- GB/T 17617Rule of sampling and inspection for refractory raw materials
- GB/T 18930Terminology for refractories
- YB/T 5202.1Preparation of specimen for unshaped refractories - Part 1: Refractory castables
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Related Standards
GB/T 10325-2012 — Shaped refractory products -- Rule of acceptance, sampling and inspection
GB/T 17617-2018 — Rule of sampling and inspection for refractory raw materials
GB/T 18930-2020 — Terminology for refractories
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