ASTM-C374 › Historical Revision Information
Standard Test Methods for Fusion Flow of Porcelain Enamel Frits (Flow-Button Methods)
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These test methods cover evaluation of the relative fusion flow characteristics of samples of a given porcelain enamel by comparison with an established standard for that frit. Two test methods are included, differing only in certain details of the samples and in the apparatus and procedure for preparation of test specimens. Both test methods give equally reproducible results and provide a satisfactory basis for comparison of fusion flow of the sample with that of the established standard. Test Method A employs granular particles of frit to which a bonding agent has been added. Button specimens are formed under high pressure in a hydraulic press. Test Method B employs crushed, sized particles of frit to which a bonding agent has been added. Button specimens are formed in a steel mold by hand. Both Test Methods use a hard steel mortar that is resistant to abrasion by the porcelain enamel frit, a hydraulic press, and a fusion flow rack. The test methods use sieves of different specifications. The steel mold assembly of both test methods consists of a die and plunger, however, Test Method B has an additional back-up disk.
Scope
1.1 These test methods cover evaluation of the relative fusion flow characteristics of samples of a given porcelain enamel frit by comparison with an established standard for that frit.
1.2 Two methods are included, differing only in certain details of the samples and in the apparatus and procedure for preparation of test specimens. Both methods give equally reproducible results and provide a satisfactory basis for comparison of fusion flow of the sample with that of the established standard.
1.2.1 Method A employs granular particles of frit to which a bonding agent has been added. Button specimens are formed under high pressure in a hydraulic press.
1.2.2 Method B employs crushed, sized particles of frit to which a bonding agent has been added. Button specimens are formed in a steel mold by hand.
Keywords
Flow and flow rate; Fusion; Porcelain enamel products-frit; fusion flow of porcelain enamel frits, by flow button methods, test; ICS Number Code 25.220.50 (Enamels)
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02.05 (Metallic and Inorganic Coatings; Metal Powders and Metal Powder Products)
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Document Number
ASTM-C374-70(2004)e1
Revision Level
1970 R04(E1) EDITION
Status
Superseded
Modification Type
Reapproval with Ed Change
Publication Date
June 15, 1970
Document Type
Test Method
Page Count
5 pages
Committee Number
B08.12