Grade Hardness (Hv) Applications DA2200 9,000-10,000 Finishing, roughing and interrupted machining of aluminum and non-ferrous materials DA10 10,000-12,000 Machining of aluminum, copper, wood, rubber, graphite and carbide DA200 8,000-10,000 Interrupted cutting of non-ferrous alloys and plastics DA90 10,000-12,000 High-silicon aluminum alloys, ceramics and carbide cutting
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