... X 55,00MMHigh quality and purity Nitrided Manganese briquettes, MN briquettes, MN metal briquettes, Manganese ingot, Mn ingot,1)used for special steel alloy, ... N 0.05%max.SIZE:28*33*55mm(90%min)manganese briquettes1)improve strength,toughness efficiently2)higher recovery rate, easy store ... ,toughness efficiently2) dissolve fast, low dissolution temperature2)higher recovery manganese metal briquettes