What material is best for your impact crusher blow bars? What material has the longest service life of a blow bar? These depend on the working conditions of your machine. There are two main aspects of the working conditions: the wear resistance and crushing difficulty of the material being crushed; and the type of material being crushed.
There are four kinds of material that we used in manufacturing crusher blow bars. Different materials suit different impact crusher working conditions.
- High Manganese. This material is widely used in crusher jaws, crusher cones, and crusher shells, not common in impact crushers. However, when crushing less abrasive and large feed material(such as limestone), the manganese blow bars are the best choice.
- Martensitic Steel. Martensitic steel lies between manganese and chrome steel. It’s used if the impact load is too little to harden the manganese steel, and good wear resistance is required along with good impact stress resistance.
- Chrome Steel. Chrome steel is the common material in casting HSI blow bars because it has a very good hardness. Regularly, chrome steel typically has a hardness of 60 to 65 HRC. And if we increase the elements’ “Mo” content, it also can get very toughness and wearable, not easy break.
- Metal Matrix Composites. This combination makes HSI blow bars very wear-resistant but at the same time very impact-resistant. With blow bars made of composites from the surface of ceramics, the working life can reach three to five times that of simple martensitic steel blow bars.
What material do you crush?
Every material has unique characteristics in terms of hardness, abrasion, and breaking characteristics. The harder the material, the more you need to watch your feed size.
MATERIAL |
HOW MUCH DOES
IT WEAR?
ABRASIVENESS |
HOW EASY DOES
IT BREAK?
CRUSHABILITY |
CONCRETE |
low |
easy |
ASPHALT |
high |
easy |
LIMESTONE |
low |
easy |
GRANITE |
high |
medium |
BASALT |
medium |
medium |
GRAVEL |
low |
easy |
What material of crusher blow bar is the best choice for crushing concrete?
Qiming Casting’s advice: Martensitic blow bars with ceramic inlays.
What material of crusher blow bar is the best choice for crushing asphalt?
Qiming Casting’s advice: Chrome steel or chrome steel blow bars with ceramic inlays.
What material of crusher blow bar is the best choice for crushing limestone?
Qiming Casting’s advice: In primary crushing, we suggest martensitic blow bars with
ceramic inlays; In secondary crushing, we suggest chrome steel or chrome steel blow bars with ceramic inlays.
What material of crusher blow bar is the best choice for crushing basalt?
Qiming Casting’s advice: In primary crushing, we suggest martensitic blow bars with
ceramic inlays; In secondary crushing, we suggest chrome steel or chrome steel blow bars with ceramic inlays.
What material of crusher blow bar is the best choice for crushing granite?
Qiming Casting’s advice: In primary crushing, we suggest martensitic blow bars with
ceramic inlays; In secondary crushing, we suggest chrome steel or chrome steel blow bars with ceramic inlays.
What material of crusher blow bar is the best choice for crushing sand & gravel?
Qiming Casting’s advice: In primary crushing, we suggest martensitic blow bars with
ceramic inlays; In secondary crushing, we suggest chrome steel or chrome steel blow bars with ceramic inlays.