Explanation
white cast iron mainly composed of nickel and chromium, nickel hard No. 1 contains (%): C3.0-3.6, Si0.3-0.5, Mn0.3-0.7, Ni3.3~4.8, Crl_ 5-2.6; Nickel hard No. 2 contains (%>) C<2.9, Si0.3-0.5, Mn0.3-0.7, Ni3:3-5.0, Crl4-2.4; nickel hard No. 4 contains (%) C2, 6-3.2, Sil.8-2.0. MnO.4-0.6, Ni5.0-6.5, t'r8.0-9.0. They are mainly martensite, with some bainite and austenite.
Classification
Metals -> Special purpose metals -> Wear-resistant metals