| Meaning | An alloy of iron with small amounts of carbon; widely used in construction; mechanical properties can be varied over a wide range. |
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| Narrower | Damascus steel, Damask steel | A hard resilient steel often decorated and used for sword blades |
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| alloy steel | steel who characteristics / characteristics are determined by the addition of other elements in addition to carbon |
| austenitic steel | steel that has enough nickel and chromium or manganese to retain austenite at atmospheric temperatures |
| carbon steel | steel whose characteristics / characteristics are determined by the amount of carbon it contains |
| case-hardened steel | steel with a surface that is much harder than the interior metal |
| chisel steel | steel used in making chisels |
| crucible steel | steel made by the mixture of molten wrought iron, charcoal, and other substances in a crucible |
| hard steel | steel with more than 0.3% carbon |
| medium steel | steel with 0.15-0.3% carbon |
| mild steel, low-carbon steel, soft-cast steel | steel with less than 0.15% carbon |
| quenched steel | steel that has been hardened by immersing it in water or oil to cool it |
| structural steel | A strong steel that is rolled into shapes that are used in construction |
| Broader | alloy, metal | A mixture containing two or more metallic elements or metallic and nonmetallic elements usually fused together or dissolving into each other when molten |
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| Substances | iron, Fe, atomic number 26 | A heavy ductile magnetic metallic element |
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| pearlite | A lamellar mixture of cementite and ferrite formed during the cooling of austenite |
| Spanish | acero |
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| Catalan | acer |
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| Adjectives | steely | resembling steel in hardness |
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| Verbs | steel | cover, plate, or edge with steel |
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