Standard Test Method of Measuring Thermal Expansion and Creep of Refractories Under Load
This method determines thermal expansion and creep under a 25 psi compressive stress for 50 hours. Other compressive stresses, up to 100 psi can be specified. The percent linear change is recorded continuously during the heat up and creep period under load. Specimen size is 1 1/2" square by 4 1/2" long. Two specimens are suggested by ASTM.
|TEMPERATURE||PER TEST OF 1||PER TEST OF 1||PER TEST OF 1|
|(50 hr hold)||(100 hr hold)||(EUL only)|
|1400°C (2552°F) or less||$900||$1135||$480|
|1400°C to 1500°C (2732°F)||$1030||$1270||$620|
|1500°C to 1600°C (2912°F)||$1160||$1410||$715|
|1600°C to 1650°C (3002°F)||$1350||$1590||$810|
|1650°C to 1700°C (3092°F)||$1420||$1675||$850|
|Alcoa Modified (2600°F)||$3200|
|Flexural Test Configuration||Quote||Quote||Quote|
|Other Test Conditions||Quote||Quote||Quote|
SIGNIFICANCE AND USE
The thermal expansion under load and the 20 to 50 h creep properties of a refractory are useful in characterizing the load bearing capacity of a refractory that is uniformly heated. Directly applicable examples are blast furnace stoves and glass furnace checkers.
1.1 This test method covers the procedure for measuring the linear change of refractory specimens that are subjected to compressive stress while being heated and while being held at elevated temperatures.
1.2 This test method does not apply to materials whose strength depends on pitch or carbonaceous bonds unless appropriate atmospheric control is used (see 7.3).
1.3 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.
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
Extracted, with permission, from ASTM C832 Standard Test Method of Measuring Thermal Expansion and Creep of Refractories Under Load, copyright ASTM International, 100 Barr Harbor Drive, West Conshohocken, PA 19428. A copy of the standard may be purchased from ASTM International, phone 610-832-9555, e-mail: firstname.lastname@example.org, website: www.astm.org.
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