Pono nā mea paipu hydrogen HR31603 a i ʻole nā mea ʻē aʻe i hoʻāʻo ʻia e hōʻoia i ka hoʻohālikelike ʻana i ka hydrogen maikaʻi. Ke koho ʻana i nā mea kila kuhili ʻole austenitic, ʻoi aku ka nui o kona ʻike nickel ma mua o 12% a ʻaʻole e emi ka like o ka nickel ma lalo o 28.5%.