The overall material of a hand chain hoist trolley can vary depending on the specific design, manufacturer, and intended application. However, several common materials are typically used in the construction of hand chain hoist trolleys:

1. Steel: Steel is one of the most commonly used materials for constructing hand chain hoist trolleys, particularly for heavy-duty industrial applications. Various types of steel, including carbon steel and alloy steel, may be used depending on the specific requirements for strength, durability, and corrosion resistance.

2. Aluminum: Some hand chain hoist trolleys may be constructed partially or entirely from aluminum, which offers advantages such as lightweight construction, corrosion resistance, and ease of handling. Aluminum hoist trolleys are often preferred for applications where weight is a concern or where corrosion resistance is important.

3. Cast Iron: In some cases, components of hand chain hoist trolleys, such as gears, wheels, or housings, may be made from cast iron. Cast iron is valued for its strength, wear resistance, and ability to withstand heavy loads, making it suitable for certain components of the hoist assembly.

4. Plastics and Polymers: Certain parts of hand chain hoist trolleys, such as handles, grips, or protective covers, may be made from plastics or polymers. These materials offer benefits such as corrosion resistance, impact resistance, and insulation properties, enhancing the overall performance and safety of the hoist.

5. Bronze or Brass: Bearings and bushings within the hoist mechanism may be made from bronze or brass, which provide excellent wear resistance and self-lubricating properties. These materials are often used in areas where high loads and frequent movement occur, requiring reliable and low-friction components.

6. Stainless Steel: In environments where corrosion resistance is critical, components of hand chain hoist trolleys may be made from stainless steel. Stainless steel offers excellent resistance to rust, corrosion, and staining, making it ideal for applications in harsh or corrosive environments, such as marine or chemical industries.

Overall, hand chain hoist trolleys are typically constructed from a combination of materials chosen to provide the necessary strength, durability, and performance characteristics required for the specific application and operating conditions. The selection of materials may vary based on factors such as load capacity, environmental conditions, and cost considerations.