Custom Sand Casting Services | OEM Iron & Steel Castings Manufacturer – EATHU

Why Sand Casting Still Matters

Sand casting is one of the oldest and most versatile metal casting processes, yet it remains vital to modern industry. From simple machinery parts to large, complex components, sand casting provides the flexibility and cost-effectiveness that many manufacturing projects require.

At EATHU, we specialize in custom OEM sand casting services for global clients across a wide range of industries. With decades of foundry experience, a strong engineering team, and a commitment to ISO-certified quality, we deliver iron and steel castings tailored to your exact specifications.

What is Sand Casting?

Sand casting is a metal forming process in which molten metal is poured into a sand mold cavity formed by compacting sand around a pattern. Once the metal solidifies, the mold is broken, and the casting is retrieved.

This method is widely used for:

• Large or heavy components

• Low-to-medium volume production

• Complex geometries

• High-temperature metal alloys

Compared with die casting or investment casting, sand casting is more adaptable and cost-effective for projects with larger dimensions or lower production runs.

Why Choose EATHU for Sand Casting?

Here’s why hundreds of global clients trust EATHU as their long-term OEM sand casting supplier:

Wide Material Capability

We work with a broad range of materials:

• Gray Iron (HT200, HT250)

• Ductile Iron (QT450-10, QT500-7, QT600-3)

• Carbon Steel & Low Alloy Steel

• Stainless Steel (CF8, CF8M, etc.)

• Heat-resistant and wear-resistant grades

Advanced Foundry Facilities

• Resin sand casting line

• Clay green sand molding line

• Core-making & shell-molding technology

• Induction melting furnaces (up to 5 tons)

• Heat treatment, shot blasting, and stress relieving

OEM & Custom Manufacturing

• Pattern making (wood, resin, aluminum)

• Custom castings from 1kg to 3000kg

• Machining, coating, assembly & inspection

• Technical support in English & drawings review

Quality Control You Can Trust

• ISO 9001:2015 Certified

• Spectrometer, UT, MT, hardness & tensile testing

• Dimensional reports, 3.1 certificates, and full traceability

Sand Casting Process at EATHU

Our optimized process ensures quality and efficiency at every stage:

Pattern Design & Mold Preparation

We begin by designing or validating your 2D/3D drawings. Patterns are made based on part geometry and casting requirements. Molding sand is selected according to metal type and complexity.

Core Making (if needed）

Cores are used to form internal cavities or undercuts. We use resin-bonded or shell cores for high-precision castings.

Molding & Assembly

Sand molds are formed using flasks and compacted with vibration or pressure. Cores and mold sections are assembled with vents, risers, and gating systems.

Melting & Pouring

Metals are melted in induction furnaces and poured at controlled temperatures. Our team monitors chemical composition to ensure conformity with the desired standard.

Cooling & Shakeout

After cooling, the mold is broken to extract the raw casting. Sand is recycled where applicable.

Cleaning & Post-Processing

Castings undergo:

• Shot blasting

• Grinding/deburring

• Heat treatment (normalizing, annealing, quenching)

• CNC machining (as per drawing)

Applications of Sand Casting

EATHU's OEM sand castings are widely used in:

Construction & Infrastructure

• Pipe fittings

• Valve bodies

• Manhole covers

• Structural brackets

Agriculture & Mining

• Pump housings

• Gearbox cases

• Wear-resistant liners

Transportation & Rail

• Coupling components

• Brake shoes

• Suspension parts

Industrial Equipment

• Machinery bases

• Bearing housings

• Motor end caps

Energy & Marine

• Wind turbine hubs

• Engine blocks

• Turbine casings

Whether for a small batch of custom castings or a large production run, EATHU delivers consistent quality and on-time delivery worldwide.

Benefits of Sand Casting for Your Project

Choosing sand casting offers several unique advantages:

• Design Flexibility: Complex shapes and hollow sections with cores

• Material Versatility: Suitable for iron, steel, and alloyed materials

• Cost-Effective for Large Parts: Ideal for heavy and bulky items

• Low Tooling Cost: Especially compared to die casting

• Rapid Turnaround for Prototypes or Small Runs

Sand casting is especially valuable when you need durable components in moderate volumes, without compromising design freedom or mechanical properties.

Industries We Serve

Our sand casting services cater to clients in:

• Automotive Aftermarket & OEM

• Industrial Pumps & Valves

• Power Generation & Marine

• Oil & Gas Equipment

• Agricultural Machinery

• Municipal Construction

With decades of B2B export experience, we understand the documentation, packaging, and compliance standards required by customers in Europe, North America, the Middle East, and Southeast Asia.

From Foundry to Final Part – One-Stop OEM Service

EATHU doesn’t just cast metal — we deliver complete OEM solutions：

Need international shipping or container consolidation? We’ve got you covered.

Conclusion

Sand casting remains one of the most dependable and scalable casting methods for modern industry. At EATHU, we combine traditional craftsmanship with modern quality systems to produce precision iron and steel castings for customers around the globe. Let us help you bring your parts to life—cost-effectively and with confidence.