The Collaborative International Dictionary
Manganese steel \Man`ga*nese" steel\ Cast steel containing a considerable percentage (10-14) of manganese, which makes it very hard and tough and highly resistant to wear. See Alloy steel, above.
WordNet
n. a steel with a relatively large component (10-14%) of manganese; highly resistant to wear and shock [syn: austenitic manganese steel]
Usage examples of "manganese steel".
There was still two or three inches of manganese steel protecting the contents, wedged in so tight that it must have seemed that nothing could budge it.
And this here is probably manganese steel with a protective coating of….
And this here is probably manganese steel with a protective coating of.
And I know what has happened to the warehouses of neo-manganese steel that have utterly disappeared and have been replaced by a half-grown jungle.