Glossary |
Boiler and boiler tube industry terms and their definitions.
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| Fatigue Limit | (Synonymous with Endurance Limit) |
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| Ferritic Stainless Steels | "The designation used for certain straight chromium steels which exhibit microstructures consisting mainly of ferrite at ordinary temperatures. Ferritic stainless steels are divided into two classifications: hardenable, and non-hardenable. When rapidly cooled from elevated temperatures the non-hardenable grades (ferritic) have a ferritic microstructure. The hardenable grades (martensitic) will exhibit a martensitic microstructure when rapidly cooled." |
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| Finish | "In the steel industry, refers to the type of surface condition desired or existing in the finished product." |
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| Finish Anneal | See heat treatment. |
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| Finish Machine Size | Normally specified in terms of the maximum machined O.D. and the minimum machined I.D. as applied to tubular parts. Finish machine size represents the size or the part as it comes form the final machining operation. From this size the tube mill can calculate a tube size which will be guaranteed to cleanup upon machining. |
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| Flame Hardening | "A process of heating the surface layer of an iron-base alloy above the transformation temperature range by means of the flame of a high temperature torch, followed by quenching." |
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| Flanged End | In a flanged end the tube has been belled or expanded and a flange turned over until the wall of the tube end is at right angles to the wall of the tube. |
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| Flash Removed- | See Electric Resistance Welded Tubing. |
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| Flash-In Tubing | See Electric Resistance Welded Tubing. |
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| Flux Leakage Test | Non-destructive test which uses magnetic lines of force to recognize any discontinuity in the test piece. |
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| Forging | "Used as a general term to describe the rolling, pressing, or hammering of steel which displaces the metal under compression by a locally applied force, usually at hot working temperatures." |
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| Fracture Strength | "As usually related to the tensile test, fracture strength or true breaking strength is defined as the load on the specimen at the time of fracture." |
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| Full Anneal | See heat treatment. |
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