surface-hardening steel
121fat and oil processing — ▪ chemistry Introduction method by which animal and plant substances are prepared for eating by humans. The oil and fat products used for edible purposes can be divided into two distinct classes: liquid oils, such as olive oil, peanut …
122Yield (engineering) — The yield strength or yield point of a material is defined in engineering and materials science as the stress at which a material begins to deform plastically. Prior to the yield point the material will deform elastically and will return to its… …
123Pattern welding — is the practice in sword and knife making of forming a blade of several metal pieces of differing composition that are forge welded together and twisted and manipulated to form a pattern. Often incorrectly called Damascus steel (which is produced …
124Bladesmith — Bladesmithing is the art of blacksmithing that relates specifically to creating knives, swords, daggers and other blades using a forge, hammer, anvil, and other smithing tools. Bladesmiths employ a variety of metalworking techniques used by… …
125dam — dam1 /dam/, n., v., dammed, damming. n. 1. a barrier to obstruct the flow of water, esp. one of earth, masonry, etc., built across a stream or river. 2. a body of water confined by a dam. 3. any barrier resembling a dam. v.t. 4. to furnish with a …
126Dam — /dam, dahm/, n. (Carl Peter) Henrik /kahrl pee ter hen rik/; Dan. /kahrddl pay teuhrdd hen rddik/, 1895 1976, Danish biochemist: Nobel prize for medicine 1943. * * * I Barrier built across a stream, river, or estuary to conserve water for such… …
127Alloy — This article is about the type of material. For the specification language, see Alloy (specification language). For lightweight auto wheels, see alloy wheel. Steel is a metal alloy whose major component is iron, with carbon content between 0.02%… …
128Wrought iron — is commercially pure iron. In contrast to steel, it has a very low carbon content. It is a fibrous material due to the slag inclusions (a normal constituent). This is also what gives it a grain resembling wood, which is visible when it is etched… …
