| NOUN | substance | Ni-hard, Ni-hard iron | cast iron to which nickel has been added to make it resist abrasion |
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| Meaning | cast iron to which nickel has been added to make it resist abrasion. | |
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| Synonym | Ni-hard iron | |
| Broader | alloy iron, alloy cast iron | cast iron containing alloying elements (usually nickel or chromium or copper or molybdenum) to increase the strength or facilitate heat treatment |
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