Nickel-chromium white cast iron, known as Ni-hard in the industry, has been used for a long time, especially in crusher and grinding parts. In addition to the carbide-forming chromium mentioned above, these cast irons also contain some nickel.

Nickel, which is found at a rate of 3% to 5% in cast iron, prevents the high-temperature phase austenite from turning into pearlite. In this way, we can ensure that the austenite structure turns into martensite, which is a very hard phase, with rapid cooling. To avoid any misunderstanding, it may be useful to emphasize again: We are not talking about a transformation of carbide particles here, but a transformation of the structure of the matrix surrounding the carbide particles.
As can be understood from the above, carbide particles give white cast iron its hardness. Since these carbide particles are formed between both iron and carbon, and chromium and carbon, the amount of carbon may need to be kept around 3.5%, in addition to 1.5% - 4% chromium, to increase wear resistance. If the toughness of the material must be high, then we have to reduce the carbon amount to around 2.7%.
According to the ASTM A 532 standard, manganese added to cast iron at a maximum rate of 1.3% prevents the formation of pearlite and also has an austenite stabilizing effect. For this reason, we see that if the manganese is relatively high, the amount of residual austenite in the structure increases after the heat treatment, and accordingly the hardness remains at relatively lower levels. Silicon is added between 1% and 1.5% to high alloy cast irons because it both increases fluid fluidity and contributes to martensite formation.

Source: https://dokumhane.net/kutuphane/yuksek-alasimli-beyaz-dokme-demirler/