Glossary |
Boiler and boiler tube industry terms and their definitions.
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| Gauges | "A measurement of thickness. There are various standard gages such as United States Standard Gage (USS), Galvanized Sheet Gage (GSG), Birmingham Wire Gage (BWG)."
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| Grain Size | A measure of the size of individual metallic crystals usually expressed as an average. Grain size is reported as a number in accordance with procedures described in ASTM Grain size specifications. |
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| Grain Size - Apparent Ferrite | Apparent Ferrite Grain Size is average of the size of the ferrite grains as microscopically viewed in the normalized or annealed condition. |
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| Grain Size - Austenitic | "Austenitic Grain Size, which is usually measurement by the McQuaid-Ehn method, represents the austenitic grain size of a material at a prescribed temperature above the upper critical, frequeintly 1700F. For austenitic stainless steels the grain size does not change upon cooling and is that observed microscopically at room temperature." |
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