Njenge-alloy, i-internel engama-625 iqulathe ikakhulu ye-nickel, iChromium kunye ne-molybdenum. Ukongeza kwezi zinyithi zintathu ziphambili, izixa ze-niobium zongezwa kwi-alloy. Ukwabela nayiphi na intsimbi akuyi kuphucula kuphela iipropathi zayo, kodwa kunye neepropathi zayo zoomatshini. Okwangoku, ukongezwa kwe-molybdenum kunye ne-niobium ukuya kwi-ASTM B446 I-Infoller 625 yeBig Bice I-Matrix ye-rigid matrix ye-Alloty engama-625 ibonelela ngamandla aphezulu ngaphandle kokusetyenziswa konyulo lokuqinisa unyango.