Star.—A brilliant spot in mid-section showing that the pipe is not all cut away. It should be removed from tool-steel especially, as it may have considerable depth. It is of no use in any steel.
Temper.—Used by the steel-maker it means the quantity of carbon present. It is low temper, medium, or high; or number so and so by his shop numbers.
Used by the steel-user or the temperer it means the color to which hardened steel is drawn: straw, brown, pigeon-wing, blue, etc., etc.
Or, it is the steel-maker’s measure of initial hardness; and it is the steel-user’s measure of final hardness.
Water-crack.—A crack caused in hardening; it may run in any direction governed by lines of stress in the mass. It is distinguished from a check by being larger, and usually plainly visible.
Wild Steel.—Steel in fusion that boils violently, and acts in the moulds like lively soda-water or beer does when poured into a glass.
Transcriber’s Notes:
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