Chromium crusher parts with 18% Cr up to 26% Cr and a hardness from 56 HRc up to 62 HRC; ... BLOW BAR. Details. VSI PARTS. Details. Key words. Bowl liner, mantle, concave, Jaw plate, cheek plate, blow bar, breaker Plate, wear liner, distribution cone, impact block. Manganese steel, high chrome cast steel. Links.