Allok baja Impen anu dicedoyed ku rupa-rupa unsur dina total jumlah antara 1.0% sareng 50% ku beurat pikeun ningkatkeun sipat mékanis. State State direcah jadi dua kelompok: bata aline anu rendah sareng steel alloy anu luhur. Bédana antara dua henteu dieusi. Smith sareng Hadhemi ngartikeun bédana dina 4.0%, bari degarmo, et al., Netepkeun dina 8,0%. [1] [2] [2] [2] [2] [2] [2] [2] [2] [2] [2] [2] [2] [2] [2] [2] [2] [2] [2] [2] [2] [2] [2] [2] [2] [2] [2] [2] [2] [2] [2] [2] [2] [2] [2] [2] [2] [2] [2] [2] [2] [2] [2] [2] [2] [2] [2] [2] [2] [2] [2] [2] [2] [2] [2] [2] [2] [2] [2] [2] [2] [2] [2] [2] [2] [2] [2] [2] [2] [2] [2] [2] [2] [2] Paling umum, frasa "alooy baja" ngarujuk kana steel rendah.
Baja stainless mangrupikeun alloy beusi anu tahan pikeun rusting. Éta ngandung sahenteuna 11% kromium sareng tiasa ngandung unsur sapertos karboh, nonmetals sanés sanés pikeun kéngingkeun sipat anu sanés. Securos tahan stel welata pikeun hasil korosi, anu nambihan pilem-pilem kesesuan anu tiasa ngajindungan bahan sareng nyalira diri dina ayana oksigén.