* the delivery date is not guaranteed until you have checked out using an instant payment method. if your guaranteed delivery item isn’t on time, you can (1) return the item, for a refund of the full price and return shipping costs; or (2) keep the item and get a refund of your shipping costs (if shipping was free, get a $5 ebay voucher). All india metal corporation is a trusted independent boron carbide powder exporter in india, shipping to over 60 countries. all india metal has been a trusted boron carbide b4c powder suppliers as well as distributor & dealer in your country. American elements specializes in producing high purity boron carbide powder with the smallest possible average grain sizes for use in preparation of pressed and bonded sputtering targets and in chemical vapor deposition (cvd) and physical vapor deposition (pvd) processes including thermal and electron beam (e-beam) evaporation, low temperature ... Boron carbide, black powder, is the hardest of the conventional abrasives. its mohs hardness is 9.36, melting point 2350 ℃ , density 2.51g/cm3. it has following unique features: neutron absorbing, of semi-conductivity,low thermal conductivity conductivity , high grinding efficiency and no reaction with either acids or alkali etc.