Angel na-agbagha, dị ka atụmatụ 600, 601,686,688 & 725 boll-Chromium-Chromium-Chromium-movybdemum na-eguzogide elu. N'ihi nkwụsi ike ya dị elu, enwere ike iji ọgwụ mgbochi na okpomọkụ dị egwu site na krigonic ruo 2200¡Ãf (9820c). Ihe dị elu alloy nke Boll Bolts na-enyere ya aka iguzogide ụdị dịgasị iche iche siri ike.