m303BÖHLER M303 HHHARD is a corrosion-resistant Cr-Mo steel, pre-hardened to approx. 1200 MPa with optimised toughness and polishability for processing corrosive mouldingM303 or M-303 may refer to: M303 Special Operations Forces demolition kit; FN 303, a semi-automatic non-lethal launcher manufactured by Fabrique Nationale de Herstal This page