What are the advantages and disadvantages of high manganese steel jaw plates compared to high chromium cast iron jaw plates?

This comparative question is very practical and directly hits the core of selection! The core difference between high manganese steel jaw plate and high chromium cast iron jaw plate is: * * High manganese steel is strong in toughness and impact resistance, weak in wear resistance; High chromium cast iron is strong in wear resistance and weak in brittleness. Specific advantages and disadvantages can be clearly divided according to the following dimensions.

###1、 Core advantages of high manganese steel jaw plate

1. Extremely strong toughness and impact resistance without cracking: The fracture toughness of high manganese steel is 3-5 times that of high chromium cast iron, which can cope with iron blocks and large hard impurities mixed in during the crushing process, and will not fracture due to instantaneous impact.

2. Work hardening adaptation to extrusion conditions: In extrusion crushing, the surface hardness can be increased from 200HBW to over 500HBW, and the harder it is used, adapting to the working principle of jaw crushers.

3. Compatible with complex mixed materials: Strong compatibility with materials with uneven composition such as construction waste and mixed ores, without strict screening of raw materials, reducing pre-treatment costs.

4. Stable service life (under suitable working conditions): In the crushing of medium and low hardness materials (Mohs ≤ 6), although the single piece has a short service life, it is not easy to suddenly fail, and replacement cycles can be planned.

###2、 The core disadvantage of high manganese steel jaw plate

1. Significant lack of wear resistance: In high hardness (Mohs>6) and highly abrasive materials, the service life is only one-third to one-fifth of that of high chromium cast iron jaw plates, requiring frequent replacement.

2. Dependent on work hardening conditions: If the crushed material is too soft (such as clay) or wet and sticky, it cannot trigger the surface hardening layer, and the wear rate will double.

3. High overall cost (high wear and tear conditions): Frequent replacement results in downtime losses, labor costs, and combined with the consumption of the jaw plate itself, making long-term usage costs higher than high chromium cast iron.

4. Not suitable for high silicon and high hardness materials: Faced with highly abrasive materials such as quartz and granite, the surface hardening speed cannot keep up with the wear rate, which can easily lead to the situation of "softer with more use".

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###3、 Summary of Advantages and Disadvantages Comparison (Key Dimensions)

|Comparison dimension | High manganese steel jaw plate | High chromium cast iron jaw plate|

|----------------|---------------------------|---------------------------|

|Core performance | High toughness, impact resistance | High hardness (HRC58-65), high wear resistance|

|Applicable material hardness | Mohs ≤ 6 (medium low hardness) | Mohs ≥ 6 (medium high high hardness)|

|Anti impurity ability | Strong (able to withstand impacts from iron blocks, etc.) | Weak (prone to breakage and cracking when encountering hard impurities)|

|Single piece service life | Short (1-3 months) | Long (3-12 months)|

|Comprehensive usage cost | lower under medium low hardness conditions | lower under high abrasion conditions|