How to choose jaw plate material based on actual working conditions?

1、 Step 1: Determine the core characteristics of the material (selection basis)

This is the key to determining the material, directly corresponding to the material's wear/impact resistance requirements.

Material hardness (determined by Mohs hardness pen or simple engraving)

Mohs ≤ 6 (medium low hardness): For materials such as limestone, dolomite, and construction waste, high manganese steel is preferred.

Mohs 6-7 grade (medium high hardness): such as quartz, hematite, sandstone, choose high manganese chromium steel (Mn13Cr2).

Mohs ≥ 7 grade (high hardness): For granite, basalt, corundum, choose high chromium cast iron.

Material abrasiveness (based on silicon content or degree of wear)

Low abrasion (SiO ₂<40%): Suitable for coal, gypsum, shale, and high manganese steel.

Medium to high abrasion (SiO ₂ ≥ 40%): such as river pebbles, quartz sand, high silicon ores, choose high manganese chromium steel or high chromium cast iron.

Material impurity content

Containing a large amount of iron blocks and large hard impurities (such as construction waste and mixed ores): High manganese steel (with strong toughness and no cracking) must be selected.

The material is pure and free of impurities (such as single hard rock): high chromium cast iron (wear-resistant priority) can be selected.

2、 Step 2: Refine the selection based on the crushing conditions

Under the same material, different working conditions can also affect the material life, and targeted adjustments are needed.

Crushing volume and downtime cost

High production capacity (over 10000 tons per day) and high downtime losses: prioritize wear-resistant materials (high manganese chromium steel/high chromium cast iron) to reduce replacement frequency.

Small production capacity and minimal impact of downtime: High manganese steel (with low procurement cost) is optional.

Moisture and viscosity of materials

High humidity (moisture content>15%), easy to adhere: choose high manganese chromium steel (with a surface hardening layer that is not easy to adhere to materials) to avoid "material blockage and wear" of high manganese steel.

Dry materials: Simply match the material according to its hardness.

Crusher type and extrusion strength

Rough jaw fracture (high squeezing impact): Priority should be given to tough materials (high manganese steel/high manganese chromium steel) to avoid cracking of high chromium cast iron.

Fine jawbone fracture (gentle squeezing): High chromium cast iron (more prominent wear resistance advantage) can be selected.

3、 Step 3: Common working conditions and material correspondence table (apply directly)

Recommended materials for actual working conditions and scenarios, core reasons

Crushed limestone, construction waste (including impurities), high manganese steel (Mn13) with strong toughness and impact resistance, suitable for low abrasion and miscellaneous material working conditions

Crushed quartz, hematite (medium high hardness), high manganese chromium steel (Mn13Cr2) has a wear resistance 40% higher than high manganese steel, while also considering toughness

Crushed granite, basalt (high hardness and high grinding), high chromium cast iron with a hardness of HRC58-65, has a lifespan 3-5 times that of high manganese steel

Crushed wet sticky sandstone, high silicon coal gangue, high manganese chromium steel (Mn18Cr2), resistant to adhesion and wear, suitable for complex humidity conditions

Low production capacity, low budget, low abrasion material, and low procurement cost of high manganese steel meet the needs of basic crushing

4、 Step 4: Compromise solution for special working conditions

When encountering mixed working conditions (such as "medium hard materials+a small amount of impurities"), composite materials with balanced performance can be selected:

Composite jaw plate (high manganese steel matrix+high chromium cast iron wear-resistant layer): The matrix is impact resistant, the surface is highly wear-resistant, and it is suitable for "medium hard+miscellaneous material" working conditions.

Inlaid alloy jaw plate: Hard alloy is embedded and welded in key wear areas of high manganese steel jaw plate, balancing toughness and local wear resistance, suitable for "intermittent high abrasion" working conditions.