7CrSiMnMoV steel round bar is a kind of flame quenching cold work die steel bar and alloy tool steel bar with high carbon content. 7CrSiMnMoV steel round bar has good good hardenability. The steel not only has high strength, but has good toughness.

6CrW2Si is under the standard GB/T1299—2000. 6CrW2Si a kind of steel formed by joining a certain amount of tungsten steel on the basis of chromium silicon steel.

5CrNiMo round bars have good toughness, high strength and abrasion resistance. Its mechanical properties at room temperature and 500 ~ 600 ℃ almost the same . When heated to 500 ℃,5CrNiMo round bars’s hardness can still maintain HB300.

5CrMnMo round bar is alloy tool steel round bar under the standard of GB/T 1299-1985. Except 5CrMnMo round bars’ harden ability and harmel fatigue resistance are poor, the other performance of 5CrMnMo round bar is similar to 5CrNiMo round bar.