From the top table you can choose the right material as soon as possible. With the material level up, the performance also promote a lot. But this is not mean to choose the best material, it also depends the operation line running stage. Normally at the prototype stage we should focus on the "anti-accident" ,if at the normal production phase, we should focus on the "anti-wear" and "Anti-accident", and if at the output promote stage, we should consider all the features. So it is not to find the best material but to find the right one.