Selecting the correct blow bar(hammer) material is critical to achieving optimal performance, long service life, and low operating costs for a mobile impact crusher . Different materials behave very differently depending on feed material, application, and operating conditions.

Below are the key considerations and common blow bar material options to help you make the right choice.

1. Understand Your Material Characteristics

Before selecting a blow bar, evaluate the following factors:

·        Material hardness – Harder rock requires higher wear resistance

·        Abrasiveness – High quartz content increases wear rate

·        Impact load – Large feed size and heavy impact require higher toughness

·        Moisture content – Wet or sticky material can accelerate wear and clogging

Correct material matching is essential to balance wear life and impact resistance.

2. Common Blow Bar Materials and Applications

▲ Manganese Steel Best for: High-impact applications 

Typical applications: Large feed size, demolition waste, mixed materials
(Not ideal for highly abrasive applications)

▲ Martensitic Alloy Steel Best for: Medium-hard materials with moderate impact

Typical applications: Limestone, recycled asphalt, mixed aggregates

▲ High Chromium Cast Iron Best for: Hard and abrasive materials

Typical applications: Granite, basalt, hard limestone, concrete recycling

▲ Martensitic With Ceramic Insert Best for: Medium-hard materials with moderate impact at least twice lifetime than Martensitic without ceramic.

Typical applications: Limestone, recycled asphalt, mixed aggregates

▲ High Chrome With Ceramic Insert Best for: Extremely abrasive materials with stable feed, at least twice lifetime than Chrome without ceramic.

Typical applications: Hard rock crushing with consistent feed size, Small feed size, Limestone, recycled asphalt.

3. Operating Conditions Matter

·        Wet or sticky material: Choose materials with smooth wear surfaces

·        High throughput demand: Prioritize wear life and consistency

·        Frequent material change: High chrome or martensitic options offer flexibility

Proper rotor speed, feed control, and correct crusher setup are equally important to maximize blow bar performance.

4. Cost vs. Performance

The cheapest blow bar is rarely the most economical.
A well-selected material can:

·        Reduce downtime

·        Lower replacement frequency

·        Improve overall crushing efficiency

Always consider cost per ton, not just purchase price.

📞 Contact Greentrack for professional guidance and customized wear part solutions for your mobile impact crusher.