The Top Chinese Vacuum Casting Partner
We Offer a Variety of Vacuum Casting Materials
Material selection determines whether a part works, lasts, can be made cost-effectively, and meets all functional and regulatory demands. Skipping this step leads to redesigns, production delays, or field failures.
Check out our wide selection of quality materials, those materials meeting the needs of different projects for strength, corrosion resistance, and specialized physical properties for customized parts by CNC machining, injection molding, sheet metal fabrication and 3D printing, vacuum casting, die casting for both prototyping and production stages.
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- RPD Provide 24/7 Engineering Support All Year Round.
- All tools and dies are engineered and produced in house
- More Than 60+ Certified Materials for Choose. Offer CoCs, Material Certifications, Inspection Reports.
- ISO 9001:2015 quality standards.
- Expert DFM & process optimization
Why does material selection matter so much for custom parts?
Choosing the right material for custom parts is critical because it directly impacts performance, cost, manufacturability, and longevity.
Mechanical & Physical Properties
Application Environment
Manufacturing Compatibility
Cost & Lead Time
Surface Finish & Aesthetics
Regulatory & Safety Requirements
Custom Parts with More than 60+ Materials
Provide Various Materials of Vacuum Casting One-Stop Services for Different Industries.
Vacuum Casting or Urethane Casting material is not a regular plastic or rubber silicone material. They belong to a type of plastic-like or rubber-like material.
Vacuum Casting Materials: ABS like material, PC like material, PMMA like material, PP like material, RUBBER/SILICONE,POM like material, PA like material, PA+Glassfibre,TPU like material
Vacuum Casting ABS Like Material Features
| Type | Feature | Color | Tensile strength | Flexural strength | Flexural modulus | Impact strength | Elongation | Shrink Rate | Heat deflection temp℃ |
| Hei-Cast 8150 | Excellent physical properties, fast curing speed, good fluidity, mostly used for shell manufacturing. | black/white/cream white | 740Kg/cm2 | 1790Kg/cm2 | 18300Kg/cm2 | 12-15Kg/cm2 | 16% | 0.30% | 100 |
| Hei-Cast 8158 | Excellent physical properties, fast curing speed, good fluidity, mostly used for shell manufacturing. | black/white/cream white | 30-60Mpa | 80Mpa | 2000-2200Mpa | 12-14kJ/m2 | 5-15% | 0.26-0.3% | 90 |
| PX-223 | Low viscosity, impact resistance, high temperature resistance, corrosion resistance. | black | 60Mpa | 80Mpa | 2300Mpa | ＞60kJ/m2 | 11% | 4% | 120 |
| Hei-Cast 8263 | Flame-retardant material UL94-V0 (the highest-level flame retardant certification for injection molding resins). | black/white | 68Mpa | 93Mpa | 2200Mpa | 10kJ/m2 | 15% | 0.003 | 80 |
| 3118 | similar to ordinary ABS features | black/white | 45Mpa | 70Mpa | 1700Mpa | 35kJ/m2 | 10% | 2% | 80 |
| UP 6160 | Withstands high temperatures up to 200°C, high replication accuracy, easy to color | Tranparent with light yellow | 59-69Mpa | 108-128Mpa | 2100-2200Mpa | 34-44J/m | 15-16% | 0.7-0.9% | 190 |
| MU55 | Good impact resistance, the product does not become brittle even used in winter. | black/white/cream white | / | 96Mpa | 2100Mpa | 16kJ/m2 | 无 | 0.30% | 93 |
Vacuum Casting PC Like Material Features
| Type | Feature | Color | Tensile strength | Flexural strength | Flexural modulus | Impact strength notched Izod, | Elongation at break | Shrink Rate | Heat deflection temperature ℃ |
| PX-700 | Good transparency, low shrinkage. | Tranparent | 40 MPa | 90 MPa | 1800 MPa | 18KJ/m2 | 10% | 0.50% | 60 |
| PX520 | Good transparency, low shrinkage. | Tranparent | 50 MPa | 100 MPa | 2000 MPa | 20 KJ/m2 | 10% | 0.50% | 70 |
Vacuum Casting PMMA Like Material Features
| Type | Feature | Color | Tensile strength | Flexural strength | Flexural modulus | Impact strength notched Izod, | Elongation at break | Shrink Rate | Heat deflection temperature ℃ |
| UPX 5210 | High transparency, easy to polish, good UV resistance, good thermal stability, and high replication accuracy | Tranparent | 65-70Mpa | 90-95Mpa | 2000-2200Mpa | 80-90KJ/m2 | 15-20% | 0.4-0.45% | 70-90 |
| Z1940 | Good fluidity, non-yellowing, corrosion protection, UV resistance,suitable for automotive light manufacturing | Tranparent | 60Mpa | 80Mpa | 2000 MPa | 10kJ/m2 | 30% | 0.30% | / |
Vacuum Casting PP Like Material Features
| Type | Feature | Color | Tensile strength | Flexural strength | Flexural modulus | Impact strength notched Izod, | Elongation at break | Shrink Rate | Heat deflection temperature ℃ | Density |
| UP 5690 | The hardness is adjustable, it releases from the mold quickly, has high elongation, is not prone to breakage, and offers high strength | black/white | 25-35Mpa | 20-50Mpa | 600-1300Mpa | 75-100kJ/m2 | 50-90% | 0.35% | / | 1.13 |
Vacuum Casting RUBBER/SILICONE Like Material Features
| Type | Feature | Color | Tensile strength | Flexural strength | Flexural modulus | Impact strength notched Izod, | Elongation at break | Shrink Rate | Heat deflection temperature ℃ | Density |
| Hei-Cast 8400 | Low viscosity, very good fluidity, fast curing, good elasticity. The hardness is adjustable; professional paint is required for spray painting | black/white | 1.5-18Mpa | / | / | / | 200-490% | 0.4-0.6% | Placed in a 120°C hot air circulating constant for 100 hours, no change occurs except for temperature fluctuations within 30°C. | 1.03-1.13 |
| MU-89 | The hardness is adjustable from 20A-90A | black/white | 17Mpa | 270% | 1.12 | |||||
| T0387 | Good transparency, adjustable hardness, not suitable for spray painting | Tranparent | 1.5-40Mpa | 260-300% | 1.15 |
Vacuum Casting PA Like Material Features
| Type | Feature | Color | Tensile strength | Flexural strength | Flexural modulus | Impact strength notched Izod, | Elongation at break | Shrink Rate | Heat deflection temperature ℃ | Density |
| 2180 | Ultra-high heat resistance up to 135°C, high hardness of 87D, extremely low shrinkage of 0.2%, corrosion resistance, acid and alkali resistance, and high abrasion resistance | black | 60Mpa | 92Mpa | 1950Mpa | 17kJ/m2 | 12% | 0.20% | 135 | 1.27 |
Vacuum Casting POM Like Material Features
| Type | Feature | Color | Tensile strength | Flexural strength | Flexural modulus | Impact strength notched Izod, | Elongation at break | Shrink Rate | Heat deflection temperature ℃ | Density |
| XU-50 | Ultra-high heat resistance up to 150°C, high hardness of 87D, extremely low shrinkage of 0.2% | black/white | 54Mpa | 87Mpa | 1900Mpa | 13kJ/m2 | 15% | 0.20% | 145 | 1.22 |
Comparsion of CNC Materials
Blog & News
What is a CNC Machining Center?
A CNC machining center is an advanced, computer-controlled machine tool capable of performing multiple machining operations—such as milling, drilling, tapping, boring, and sometimes turning.
Ashely . March 9, 2026
How many kinds of Types in CNC Machining Centers?
There are at least 5 different CNC lathes type in Machining Centers: Vertical Machining Center, Horizontal Machining, 5-Axis Machining Center, Gantry / Bridge Mill, Turn-Mill Center (Multi-Tasking).
Ashely . March 9, 2026
What is CNC Machining?
CNC (Computer Numerical Control) machining is a subtractive manufacturing process in which pre-programmed computer software controls the movement of factory tools and machinery to remove material from a solid workpiece, creating a finished part or product.
Ashely . March 9, 2026
Would you like to start a project with us?
FAQs About Our NPI Solutions Services
Why Tooling?
Tooling is the foundation of high-volume, repeatable manufacturing. Tooling turns a slow, manual process into a fast, automated, high-volume production system. If you need mass production, you must be choose tooling and molding production.
What kind of equipment do you use?
The molding workshop includes EDM, wire EDM, 50+CNC machining center, 50+injection machines ranging from 80 to 1000 tons, ect to meet different production requirements. Request equipment list, contact our team: ashely@rpdmfg.com.
Do you support export mold or production?
Yes, exactly. We support both. You can either for use at your own facility or leave it with us for long-term molding production.
What is your quality control system?
We operate under a rigorous Quality Management System (QMS) aligned with ISO standards. Our 5 Steps QC process is including IQC (Incoming Quality Control) , FQC (Final Quality Control) , OQC (Outgoing Quality Control) for routine production.
QE (Quality Engineering) / CAPA (Corrective and Preventive Actions) implemented throughout the entire product lifecycle, especially during the post-sale stage, to drive continuous improvement. Simply speaking 100% inspection before shipment to ensure zero defects.
What kind of quality assurance or warranty do you offer on orders?
One of the reasons engineers purchase from RPD is that we take on all the risks for you. We guarantee you’ll love what you get. Not happy with it? We’ll either redo it or give you a full refund. Your purchase is completely risk-free.
Why injection tooling is so expensive?
Material – Hardened steel (costly but durable for high volume)
Complexity – CNC, EDM, polishing; multi-cavity, undercuts add cost
Precision – Tight tolerances require advanced equipment & skilled labor
Customization – Every mold is custom-built for a specific part
Engineering – Significant design time for cooling, ejection, and geometry
Which kind of file formats can I send for tooling& production?
We accept STEP, IGES, STL, DWG, DXF, and other common CAD formats.
What Factors will Influence Tooling Design?
1. Part Geometry – Shape, size, and complexity drive mold design. Thin walls, intricate details, and complex geometries require specialized features like additional cooling or advanced gating systems.
2. Material Selection – The plastic type affects cooling rates, shrinkage, and flow. Polypropylene shrinks more; polycarbonate needs higher mold temperatures. Abrasive or corrosive plastics also demand wear-resistant mold materials.
3. Tolerances & Precision – High-precision parts (automotive, medical) require tighter mold tolerances — which complicates design and increases cost.
4. Ejection System – Ejector pins, air blasts, or stripper plates must be carefully integrated to remove parts without damage — affecting both design and cycle time.
5. Gate Design – Gate type and location (direct, pin, edge) control how molten plastic enters the mold, impacting part quality, surface finish, and cycle time.
6. Undercuts & Parting Lines – Undercuts or complex shapes may require side actions or lifters to release the part, increasing mold complexity and cost.
Can we store the mold at your facility for future production orders? Do you provide free maintenance for the mold?
Yes, we offer two key benefits for molds set up at our facility: free storage and free maintenance.