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unloader chute plates ASTM A532
unloader chute plates ATSMA532 refers to abrasion-resistant plates used in the construction of unloader chutes, designed to handle heavy wear from materials like aggregates, ores, or grains.
1. Unloader Chute Plates
Function: These plates line the chute (a channel guiding bulk materials during unloading) to protect against abrasion, impact, and corrosion.
Applications: Common in mining, agriculture, cement, and material handling industries.
1. Material
Standard name: ASTM A532
Material type: (High Chromium White Iron), belongs to wear-resistant alloy cast iron.
Core ingredients:
Chromium (Cr): 15%~30% (forming high hardness carbide, resistant to wear).
Molybdenum (Mo): 1%~3% (enhanced high temperature strength and impact resistance).
nickel (Ni)
manganese (Mn)
2. Key features
Ultra high hardness: the surface hardness can reach 500800 BHN (Brinell hardness), 3~5 times higher than ordinary steel.
Wear resistance: can resist the long-term wear of sharp materials such as ore, coal, sand and stone.
Impact resistance: Some categories (such as Class III) can withstand moderate impact loads.
Corrosion resistance: high chromium content provides a certain oxidation and corrosion resistance.
3. The ASTM A532 classification of No
The criteria are divided into three main categories, selected based on the composition and performance differences:
Category typical components, applicable scenario Class I | 15 25% Cr, 1 3% Mo | extreme wear (e. g. mine crusher lining plate) Class II | 1 2 20% Cr, 1 2% Ni | wear + medium impact (e. g. conveyor chute) Class III | 8 12% Cr, 4 5% Ni, 1.5% Mo | high impact + wear (e. g. ball mill)
4. Typical applications
Mine equipment: crusher lining plate, chute, bucket teeth.
Cement industry: raw material grinding roller, clinker conveying pipeline.
Power industry: coal-fired boiler to drop coal pipe, slag removal equipment.
Agricultural machinery: feed grinder hammer chip, grain conveying system.
5. Precautions
Welding difficulty: high chrome cast iron welding requires special welding materials and process (such as preheating and slow cooling).
Procurement Tip: Identify the requirements (wear type, impact strength) to select the appropriate category.
ASTM A532 Chemical composition list
| 标准 | 化学成分(W%) | 对应国际标准 | ||||||||
| C | Si | Mn | Ni | Cr | Mo | Cu | P | S | ||
| ISO 21988/JN/ HBW555XCr13 |
1.8-3.6 | ≤1.0 | 0.5-1.5 | ≤2.0 | 11.0-14.0 | ≤3.0 | ≤1.2 | ≤0.08 | ≤0.08 | EN-GJN-HV600(XCr11) ASTM A532 12%Cr |
| ISO 21988/JN/ HBW555XCr16 |
1.8-3.6 | ≤1.0 | 0.5-1.5 | ≤2.0 | 14.0-18.0 | ≤3.0 | ≤1.2 | ≤0.08 | ≤0.08 | EN-GJN-HV600(XCr14) ASTM A532 15%Cr-Mo AS2027 CrMo 15 3 G-X 300CrMoNi 15 2 1 |
| ISO 21988/JN/ HBW555XCr21 |
1.8-3.6 | ≤1.0 | 0.5-1.5 | ≤2.0 | 18.0-23.0 | ≤3.0 | ≤1.2 | ≤0.08 | ≤0.08 | EN-GJN-HV600(XCr18) ASTM A532 20%Cr-Mo AS2027 CrMo 20 1 G-X 260CrMoNi 20 2 1 |
| ISO 21988/JN/ HBW555XCr27 |
1.8-3.6 | ≤1.0 | 0.5-1.5 | ≤2.0 | 18.0-23.0 | ≤3.0 | ≤1.2 | ≤0.08 | ≤0.08 | EN-GJN-HV600(XCr23) ASTM A532 25%Cr-Mo AS2027 Cr27 LC&Cr27 HC G-X 260Cr27 |
| ISO 21988/JN/ HBW600XCr35 |
3.0-5.5 | ≤1.0 | 1.0-3.0 | ≤1.0 | 30.0-40.0 | ≤1.5 | ≤1.2 | ≤0.06 | ≤0.06 | AS2027 Cr35 |
| ISO 21988/JN/ HBW600XCr20Mo2Cu |
2.6-2.9 | ≤1.0 | ≤1.0 | ≤1.0 | 18.0-21.0 | 1.4-2.0 | 0.8-1.2 | ≤0.06 | ≤0.06 | AS2027 CrMo2Cu 20 21 |
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