When it comes to material selection in sand casting, manufacturers offer a wide range of options to suit various applications and requirements. The choice of material depends on factors such as mechanical properties, corrosion resistance, heat resistance, cost, and specific application considerations. Here are some common materials used in sand casting and the manufacturers who offer them:

1. Gray Iron: Gray iron, also known as gray cast iron, is a popular choice for sand casting due to its excellent castability, good machinability, and cost-effectiveness. It is widely used in automotive, machinery, and general engineering applications. Manufacturers such as Xinxing Ductile Iron Pipes Co., Ltd., and Elyria Foundry provide gray iron castings.
2. Ductile Iron: Ductile iron, also known as nodular cast iron, offers improved strength, ductility, and impact resistance compared to gray iron. It is suitable for applications that require higher mechanical properties and toughness. Manufacturers like Waupaca Foundry and Dotson Iron Castings produce high-quality ductile iron castings.
3. Steel: Steel is a versatile material that offers excellent strength, durability, and heat resistance. It is commonly used in applications that require high-performance properties, such as structural components, machinery parts, and tools. Sand casting manufacturers like Steel Cast Ltd. and CPM Industries specialize in steel casting production.
4. Aluminum: Aluminum castings are lightweight, have good corrosion resistance, and offer excellent thermal conductivity. They are widely used in industries such as automotive, aerospace, and electronics. Manufacturers like The Eagle Group and Aluminum Castings Company produce aluminum castings using sand casting processes.
5. Bronze: Bronze is an alloy of copper and tin that offers good strength, corrosion resistance, and wear resistance. It is commonly used in applications that require high durability and resistance to harsh environments, such as marine components, valves, and fittings. Manufacturers like Spuncast Inc. and Lawton Bronze Foundry provide bronze castings.
6. Brass: Brass is an alloy of copper and zinc that offers good strength, corrosion resistance, and machinability. It is widely used in applications such as plumbing fixtures, electrical connectors, and decorative components. Manufacturers such as Brass Founders Sheffield (BFS) and LeClaire Manufacturing specialize in brass casting production.
7. Other Materials: Sand casting manufacturers also offer casting services in other materials such as iron-chromium alloys, nickel-based alloys, and various specialty alloys. These materials are used in industries such as aerospace, power generation, and chemical processing. Manufacturers like Barron Industries and CIREX produce castings in a wide range of specialty alloys.

When selecting a sand casting manufacturer, it is important to consider their expertise and experience in working with specific materials. Look for manufacturers who have a proven track record in producing high-quality castings in the desired material and who can provide material certifications and quality assurance documentation.