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As for the type of steel
Carbon Steel
is steel with carbon, or low alloy level, of chemical composition
defined in broad ranges.
Special/Alloy
Steel is alloy or high carbon steel or, of chemical
composition defined in narrow ranges for all elements and
strict specifications.
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Mechanical construction steel: carbon
and low alloy steel for forgery, rolling bearings, springs,
axis, etc.
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Tool steel: high carbon or high alloy
steel, for the production of tools or matrixes, for hot
or cold work, including high-speed stee
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