What Materials Are High Manganese Chromium Steel Impact Crusher Plate Hammers Mainly Used To Crush?

High manganese chromium steel impact hammer (such as Mn13Cr2, Mn18Cr2, etc.) is a wear-resistant material optimized by adding chromium element on the basis of high manganese steel. Its core advantage lies in the balance of high hardness, impact resistance, and wear resistance, especially suitable for crushing medium to high hardness and high abrasion ores and rocks. The following are its main application scenarios and material classifications:

1、 Core application area: High hardness ore crushing

1. Hard rock materials (Mohs hardness level 6-7)

Granite: commonly used as building aggregate and highway pavement stone, the work hardening characteristics of high manganese chromium steel can effectively cope with its high quartz content and strong abrasion resistance.

Basalt: commonly used for railway ballast and wear-resistant concrete. The surface hardness of Mn18Cr2 material plate hammer under impact can reach 550HBW or more, and its wear resistance is 2-3 times that of ordinary high manganese steel.

Diabase: commonly used in chemical acid resistant lining and cast stone raw materials. The corrosion resistance enhanced by chromium element can reduce the erosion of plate hammers by acidic media.

2. High silicon content ore (SiO ₂ ≥ 60%)

Quartz stone: high hardness (Mohs 7) and strong abrasion resistance. The carbide strengthening layer of high manganese chromium steel (such as (Cr, Fe) ₇ C ∝) can resist the cutting wear of quartz particles.

River pebbles: The surface is smooth and the texture is hard. The toughness of high manganese chromium steel can prevent the plate hammer from breaking under high-frequency impact.

3. Highly abrasive metal ores

Iron ore (magnetite, hematite): High hardness (Mohs 5.5-6.5), Mn13Cr2 plate hammer has a lifespan 30% -50% longer than ordinary high manganese steel in iron ore crushing.

Gold and copper mines: containing associated minerals such as quartz, the wear resistance of high manganese chromium steel can reduce the cost of frequent replacement of plate hammers.

2、 Extended application: Efficient crushing under complex working conditions

1. High temperature or corrosive environment

Metallurgical slag treatment: such as steel slag and blast furnace slag, the enhanced oxidation resistance of chromium element can cope with high-temperature oxidation atmosphere.

Crushing of sulfur-containing ores: When crushing sulfur-containing ores such as pyrite, high manganese chromium steel has better corrosion resistance than ordinary high manganese steel.

2. High humidity or viscous materials

Wet sandstone and shale: Although high manganese steel is prone to clogging in wet viscous materials, the surface hardening layer of high manganese chromium steel can reduce adhesion and improve crushing efficiency.

Coal gangue (high sulfur/high ash content): The corrosion resistance enhanced by chromium element can extend the service life of the plate hammer in acidic coal gangue crushing.

3. Recycling resource processing

Construction waste (concrete blocks, waste bricks): The composition is complex and contains steel bars. The impact resistance of high manganese chromium steel can meet the crushing needs of mixed materials.

3、 Performance comparison and selection suggestions

Material type Applicable hardness range Typical material Advantages of high manganese chromium steel

High manganese steel (Mn13) with low to medium hardness (≤ Mohs 6), limestone, dolomite, and coal gangue have good toughness, but insufficient wear resistance, making it suitable for low abrasion scenarios.

High manganese chromium steel (Mn13Cr2) with medium to high hardness (Mohs 6-7) improves the wear resistance of granite, basalt, and quartz by 30% -50%, can withstand moderate impact, and has high cost-effectiveness.

Ultra high manganese chromium steel (Mn18Cr2) has high hardness (Mohs 7) and higher hardness (≥ 550HBW after work hardening) for quartz, river pebbles, and iron ores. Its service life is 2-3 times longer than Mn13Cr2, making it suitable for high impact and high abrasion conditions.

High chromium cast iron has extremely high hardness (Mohs 7 or above), while corundum and silicon carbide have a hardness of HRC58-65. However, it is brittle and requires hammer support, making it suitable for low impact scenarios.

4、 Precautions

Working condition matching: When crushing high hardness materials, it is necessary to ensure that the crusher power is sufficient (such as rotor speed ≥ 650r/min) to fully stimulate the work hardening effect of high manganese chromium steel.

Heat treatment process: High manganese chromium steel (such as ZG120Mn13Cr2) smelted with alkaline furnace lining has better performance, can reduce phosphorus content, and improve impact toughness.

Cost balance: Mn18Cr2 is priced 15% -20% higher than Mn13Cr2, but has a longer lifespan and lower long-term comprehensive costs.

summary

High manganese chromium steel impact breaking plate hammer is an ideal choice for crushing materials with medium to high hardness and high abrasion, especially in the crushing of hard rocks such as granite, basalt, and quartz. The carbide structure and work hardening characteristics reinforced by chromium elements significantly improve the wear resistance of high manganese steel while maintaining its toughness, making it suitable for efficient crushing needs in industries such as mining, building materials, and metallurgy. In actual selection, comprehensive consideration should be given to material hardness, impact strength, and budget. If necessary, composite hammers (such as high chromium cast iron+high manganese steel) can be used to further optimize performance.