This you have to see the actual wear, because there are a lot of tracks on the market now are Q235, and ordinary steel plate is a model, and is 55Q is better, but the price is expensive, now there are 42CrMo, 65Mn material crane wheel, especially 65Mn material crane wheel cost performance is higher. Crane wheel forgings are generally no. 45 steel after heat treatment and no. 55 just quenching and tempering heating treatment, there is a lower grade of iron wheel.
If the hardness, depends on how you match, good wheel forgings with ordinary rail, if there is gnawing rail, the track must grind but the wheel, if it is high quality configuration, gnawing rail, should be said to be lose-lose. If not gnaw track, ordinary enough for you to use for several years.