ASTM C467-14(R2018) pdf free download

ASTM C467-14(R2018) pdf free download.Standard Classification of Mullite Refractories
1. Scope
1.1 This classification covers refractory products consisting predominantly of mullite (3Al 2 O 3 ·2SiO 2 ) crystals that are formed by either converting any of the sillimanite group of minerals, or synthesizing from appropriate materials in a melt or sinter process. 1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard. 1.3 This international standard was developed in accor- dance with internationally recognized principles on standard- ization established in the Decision on Principles for the Development of International Standards, Guides and Recom- mendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
2.1 ASTM Standards: 2 C16 Test Method for Load Testing Refractory Shapes at High Temperatures C832 Test Method of Measuring Thermal Expansion and Creep of Refractories Under Load N OTE 1—Chemical analysis of refractory products is determined by a combination of X-ray fluorscence (XRF) and inductively coupled plasma (ICP) using standard reference materials (SRM), including various types ofminerals and refractory materials which are available from the National Institute of Standards and Technology and other appropriate sources.
3. Significance and Use
3.1 The mullite content of an alumina-silica refractory material has an important influence on volume stability, load- bearing properties, and its satisfactory use in refractory appli- cations. This classification is considered useful for purchase specifications and quality control.
4. Basis of Classification
4.1 The refractory products falling within the scope of this classification are classified by chemical and physical tests to meet the following requirements:
5. Test Specimens
5.1 Testing for compliance with this classification shall be performed on 9 by 4 1 ⁄ 2 by 2 1 ⁄ 2 -in. (228 by 114 by 64-mm) rectangular brick as made, or on specimens of this size cut from larger shapes, utilizing existing plane surfaces as much as possible.
6. Test Methods
6.1 The properties enumerated in this classification shall be determined in accordance with the following ASTM methods: 6.1.1 Alumina Content—XRF and ICP. 6.1.2 Load Test—Schedule 6 ofTable 1 in Test Method C16. 6.1.3 Thermal Expansion and Creep—Test Method C832.
7. Retests
7.1 Because of possible variables that may result from sampling or an unsatisfactory reproducibility of tests by different laboratories, the material may be resampled and retested at the request of either the manufacturer or the purchaser. This could apply where the first test results may not conform to the requirements prescribed in this classification. Therefore, the final results to be used shall be the average of at least two series of tests, each of which has been obtained by following the specified testing procedures in detail.
8. Keywords
8.1 alumino-silicate; classification; mullite; refractorie