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1.3207
HS10-4-3-10
1.3207 (HS10-4-3-10) is a high-alloy [[glossary:schnellarbeitsstahl|high-speed steel]] with 10 % [[element:W|tungsten]], [[element:Mo|molybdenum]], and 10 % [[element:Co|cobalt]]. The high cobalt content gives maximum [[glossary:warmhaerte|hot hardness]]. Applications: high-performance milling cutters, tools for hard-to-machine materials.