6000MM BMH6000 Aluminium Feed Beam Profiles For Underground Mining Rock Drilling Equipment FEATURES BMH6000 ALUMINUM FEED BEAM PROFILES 1. Material: Aluminum Alloy 7020 With Heat Treatment T6 2. Compliant with Standard of GB/T6892-2006 3. Tolerance: twist degree--- less than 1degree per meter and 5 degrees for whole length; curvature--- less than 1mm per meter and 5mm for whole length 4. Mechanic: σb≥320MPa, σ0.2≥270MPa, δ5≥8% 5. The surface is free from manufacturing defects