Custom Metal Casting for Industrial Applications
From prototype development to volume production, we deliver reliable casting solutions with consistent quality and controlled lead times.
- Wide range of ferrous and non-ferrous casting processes
- Tight tolerance control with optional CNC post-machining
- Flexible volumes — from small batches to mass production
Our Casting Services
Flexible casting solutions tailored to different part sizes, tolerances, and production volumes.
Sand Casting
A versatile and economical casting solution for large or low-volume components.
- Suitable for prototypes and small batches
- Wide size range from ~0.5 kg to large castings
- Supports steel, iron, and aluminum parts
Investment Casting
A high-precision casting process ideal for small to medium-sized parts with complex geometries.
- Thin-wall castings from ~0.5 mm
- Excellent surface finish and dimensional accuracy
- Suitable for stainless steel, alloy steel, and superalloys
Die Casting
A high-efficiency casting method designed for high-volume production with tight tolerances.
- Aluminum, zinc, and magnesium alloy casting
- Consistent quality for complex structures
- Cost-effective for mass production
Materials & Surface Finishes
A comprehensive selection of casting materials and finishing options to meet functional, mechanical, and environmental requirements.
Surface Finishes
Shot Blasting / Sand Blasting
Remove burrs and surface defects
Machining Finish
Precision machined for tight tolerances
Heat Treatment
Normalizing, quenching, tempering & annealing
Powder Coating / Painting
Superior durability,environmental friendliness
Zinc / Nickel Plating
Zinc, nickel, chrome plating
Casting Materials
Carbon Steel
1010, 1020, 1045, 1060, 1080
super Alloy
Inconel 625, 718, Hastelloy X
Stainless Steel
304,316,17-4PH, 410, 2205
Aluminum Alloy
A357,A380,A443,A514
Titanium Alloy
Grade 2, Grade 3, Grade 4
Magnesium Alloy
AZ91D, AM50A, AM60B
Custom material grades and surface treatments are available upon engineering review.
One-Stop Casting & Machining Solutions
From design support and process selection to production and global delivery,
RPA offers integrated casting solutions to simplify sourcing and ensure consistent quality.
Industries We Serve
Delivering precision cast components across key industries with proven manufacturing expertise.
Why Choose Our Foundry
Decades of casting expertise supporting reliable, scalable metal component production.
Technical Expertise
Experienced metallurgical and process engineering team
Optimized casting parameters for strength and consistency
In-house control of melting, pouring, and solidification
Support for complex geometries and critical components
Production Capacity
Stable casting output supporting medium to high volumes
Flexible production from prototypes to serial orders
Multiple casting methods operated under one system
Reliable capacity planning to meet project timelines
Global Reach
Long-term experience serving international customers
Familiar with global quality and documentation requirements
Coordinated logistics for worldwide delivery
Clear communication throughout the production cycle
Custom Solutions
Application-driven material and process selection
Tooling, sampling, and process validation support
Design-for-manufacturing optimization
Integrated casting, machining, and finishing services
Custom Casting Service Workflow
A clear, structured casting workflow designed to ensure quality, efficiency, and on-time delivery.
Quotation
Upload your drawings or specifications.
We provide a detailed casting quotation typically within 24 hours.
Design Review
Our engineers review your requirements and
optimize design for manufacturability and cost efficiency.
Prototyping
Prototype samples are produced for approval
before proceeding to full-scale production.
Production
Mass production begins under controlled processes
with ongoing quality monitoring and status updates.
Delivery
Final inspection, secure packaging,
and worldwide shipment with full traceability.
What is Casting
Casting is a metal manufacturing process in which molten metal is poured into a mold cavity shaped to the desired part geometry.
After filling the mold through gravity, pressure, or vacuum, the metal cools and solidifies, forming a near-net-shape component.
Casting is widely used for producing parts with complex geometries, internal features, or varying wall thicknesses that are difficult or inefficient to achieve through machining or forging alone.
Advantages of Casting
Process Flexibility
Multiple casting methods are available to suit different materials, tolerances, and production volumes.Material Versatility
Supports a wide range of metals, including steel, stainless steel, aluminum, and copper alloys.Complex Shape Capability
Enables the production of intricate geometries, internal cavities, and thin-wall structures.Cost Efficiency for Volume Production
Tooling reuse makes casting economical for medium- to high-volume manufacturing.
Common Metal Casting Methods Comparison
A practical comparison of casting processes by materials, dimensional accuracy, surface finish, and production efficiency.
| Casting Process | Mold / Pattern Type | Typical Materials | Dimensional Accuracy & Surface Finish | Production Efficiency |
|---|---|---|---|---|
| Die Casting | Metal mold with high pressure | Al, Mg, Zn alloys | Very high (CT6–8), excellent finish | Very High |
| Low Pressure Casting | Metal mold with low pressure | Mainly aluminum & magnesium alloys | High (CT7–9), smooth | Medium–High |
| Lost Foam Casting | Sand mold + foam pattern | Cast iron, steel, aluminum | Medium–High (CT6–9), smooth | Medium–High |
| Sand Casting | Disposable sand mold | Most metals (steel, iron, aluminum, etc.) | Low (CT11–14), rough surface | Low–Medium |
| Investment Casting | Ceramic shell (disposable) | Wide range, incl. stainless & superalloys | High (CT4–7), smooth | Low |
| Centrifugal Casting | Rotating metal or sand mold | Steel, iron, copper, aluminum | Good OD surface; ID typically machined | High |
| Permanent Mold Casting | Reusable metal mold | Low-melting alloys (Al, Mg, Cu) | Medium–High (CT8–10), smooth | High |
FAQs
What casting processes does RPA offer?
We provide sand casting, investment casting, die casting, permanent mold casting, low pressure casting, lost foam casting, and centrifugal casting. Process selection is based on geometry, tolerance, and production volume.
Do l need to pay for the mold?
In most cases, tooling or mold costs are required upfront, depending on part design and production volume.
For long-term or qualified production programs, tooling costs may be partially or fully refundable based on order agreements.
What tolerances can be achieved with casting?
Tolerance depends on the casting method. Investment casting achieves high precision (CT4–7), while sand casting suits larger parts with looser tolerances (CT11–14). CNC machining is available for critical dimensions.
How long does the production process take?
Lead times vary by complexity and quantity:
Prototypes: approx. 3–6 weeks
Small–mid volumes: approx. 4–8 weeks
Large production: approx. 6–12 weeks
Expedited timelines may be available upon request.
Can RPA provide CNC machining after casting?
Yes. We offer integrated CNC machining to achieve tight tolerances, accurate dimensions, and improved surface finish.
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