Investment Casting

Investment CastingHigh-quality castings for a variety of applications
Investment casting is a precision casting process known for producing high-quality, complex, and precise metal parts, offering advantages over methods like sand casting. It supports various materials, including aluminum alloys, copper alloys, and stainless steel, making it ideal for intricate and high-precision castings.
The use of wax patterns allows investment casting to capture fine details, enabling the production of components with complex features and tight tolerances, often reducing the need for additional machining. This method is particularly suitable for industries requiring precise and durable parts, such as aerospace, automotive, and medical sectors.
Additionally, investment casting is highly flexible, supporting both small-batch and large-scale production. Whether you need prototypes, custom designs, or specialized components, this process ensures consistent quality and reliability, making it a trusted solution for high-performance metal parts tailored to your needs.
High Dimensional Accuracy
Fine Surface Finish
Wide Selection of Metal Materials
Customized Solutions Available
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ISO9001:2015 Certified

12K+Precision Castings Produced Monthly,3D printing wax model process accounts for 30%

40+Different Casting Materials

50+Countries Shipped

Our Core Casting Capabilities And Technological Advantages

High-Precision Tolerance Control
Two investment casting processes are used to meet the needs – water glass casting (ISO 8062 CT7-CT8 grade, suitable for excavator bucket teeth, etc.) and silica sol casting (ISO 8062 CT4-CT6 grade, suitable for high-precision scenarios such as medical devices).
High-Quality Surface And Post-Processing
The surface roughness of water glass casting is Ra12.5, which meets functional requirements; the surface roughness of silica sol casting reaches Ra6.3, which can reduce subsequent processing and shorten delivery cycle.
Complex Design Adaptation
It supports customization based on 3D drawings, CAD models or physical objects, and is capable of casting complex structures such as thin walls, inner cavities, and special shapes. It can flexibly undertake single-piece trial production and mass production.
Wide Material Coverage
Investment casting of stainless steel (304, etc.), carbon steel (45 steel, etc.), alloy steel (42CrMo, etc.), aluminum alloy (ZL101, etc.) can be used to meet different performance requirements.
Full-Cycle Customization Support
From structural optimization, mold design, process simulation, to trial production, mass production and quality inspection, we provide one-stop services to help products go from concept to implementation.

Advantages of Investment Casting

Investment casting produces components with high surface precision and allows for complex shapes. It is an ideal choice for customers who require specific dimensional accuracy, smooth surface finishes, and the production of small to medium-sized components.
High Precision
Investment casting offers exceptional dimensional accuracy, with tolerances as tight as ±0.05mm, minimizing or eliminating the need for post-machining. It is ideal for precision components with strict requirements.
Customization
This process supports both small-batch and large-scale custom production. Parts can be manufactured based on customer-provided drawings or samples, ensuring tailored solutions for specific needs.
Smooth Surface Finish
Investment casting produces high-quality surface finishes, typically achieving Ra 1.6-3.2μm. This reduces the need for additional surface treatments, enhancing the appearance and functionality of the final product.
Design Freedom
The process allows for complex geometries, internal cavities, thin walls, and intricate details that are difficult to achieve with other casting methods. This provides greater flexibility in engineering design.
High-Quality Materials
Investment casting supports a wide range of high-performance materials, including stainless steel, carbon steel, alloy steel, and aluminum alloys. This ensures optimal material selection for various industrial applications.
Wide Size Range
Investment casting can produce parts ranging from a few grams to dozens of kilograms, making it suitable for various industries such as aerospace, automotive, medical, and machinery manufacturing.

Our Core Casting Capabilities and Technological Advantages

High-Precision Dimensional Control and Tight Tolerance Enforcement
We utilize two primary investment casting processes to meet the diverse precision and cost requirements of various customers:
Water Glass Casting: Suitable for customers with medium-to-high precision requirements, it can achieve linear tolerances of ISO 8062 CT7-CT8. It is suitable for applications requiring a high balance between cost and precision, such as excavator bucket teeth, truck components, and agricultural machinery accessories.
Silica Sol Casting: Targeted for applications requiring high precision and surface quality, it can achieve internal diameter tolerances of ISO 8062 CT4-CT6. It is widely used in stainless steel castings, medical device components, and automotive precision structural parts.
Excellent Surface Quality and Post-Processing Optimization
We understand that surface quality not only impacts appearance but also directly influences product assembly performance and service life:
Water glass casting: Achieves an average surface roughness of Ra12.5, suitable for products with moderate aesthetic requirements but prioritized functionality. Silica sol casting: Achieves an excellent surface finish of Ra6.3. In high-end applications, this significantly reduces subsequent polishing, machining, and other processing steps, shortening overall lead times.
Strong Design Adaptability and Complex Structure Casting Capabilities
We support customized development based on 3D drawings, CAD models, or physical samples. We can create complex geometries such as thin-walled structures, internal cavities, and special-shaped contours, breaking through the limitations of traditional casting processes. Whether it’s a single trial or mass production, we offer flexible solutions to ensure the complete realization of design intent.
Wide Range of Material Adaptability
We support investment casting of a variety of high-performance metal materials, including but not limited to:
Stainless steel (such as 304, 316, 17-4PH), carbon steel (such as 45 steel, 20# steel), alloy steel (such as 42CrMo, 20CrMnTi), and aluminum alloy (such as ZL101, A356),ASTM A743 CA6NM material. This material diversity enables us to provide customers with optimal material matching solutions to meet the strength, corrosion resistance, wear resistance, and other performance requirements under different working conditions.
Customized Services and Full-Cycle Technical Support
We are not just a foundry, but also a product development partner for our customers. We provide a full range of services from product structure optimization, mold design, casting process simulation, trial production and proofing to mass production and quality inspection, ensuring a seamless transition from concept to finished product.
Process TypeDimensional Accuracy (IS0 8062)Surface Roughness (Ra)Cost LevelTypical Application Scenarios
Water Glass CastingCT7-CT812.5MiddleExcavator Parts, Agricultural Machinery, Truck Structural Parts
Silica Sol CastingCT4-CT66.3
High		Medical Equipment, Automotive Precision Parts, Stainless Steel Castings

Why Choose Investment Casting In Leierwo?

Precise Dimensional Control and Stable Tolerance Performance
High Surface Quality, Reducing Subsequent Processing Costs
Powerful Complex Structure Casting Capabilities to Meet Personalized Design Needs
Wide Range of Material Adaptability, Adaptable to Various Industry Application Scenarios
Full-Process Services From Design to Mass Production Help Customers Quickly Launch Their Products
We are committed to providing high-quality, cost-effective, and highly reliable metal parts solutions to our global customers through advanced investment casting technology. Whether your project is in the early stages of R&D or mass production, we can provide you with professional and customized casting services.

If you have specific product requirements or drawings, please feel free to contact our technical team. We will provide you with professional casting advice and cost optimization solutions.

Customizable Surface Treatment Options

Shot Blasting
Shot blasting is a surface treatment process that involves propelling abrasive materials at high speeds to remove surface contaminants, scale, or rust. This process enhances surface adhesion for subsequent coatings and improves fatigue resistance.
Machining
Machining is a precision process used to achieve tight tolerances and smooth surface finishes. It includes milling, turning, drilling, and grinding to meet specific dimensional and functional requirements.
Paint Coating
Paint coating provides a protective and decorative finish to alloy steel surfaces. It enhances corrosion resistance and allows for various color and texture options, making it ideal for aesthetic and functional purposes.
Powder Coating
Powder coating is a dry finishing process that creates a durable, wear-resistant, and corrosion-resistant surface. It offers a uniform appearance and is available in a variety of colors and textures.
Galvanized Coating
Galvanization involves applying a layer of zinc to the steel surface, offering excellent corrosion protection. Hot-dip galvanizing and electro-galvanizing are common methods used to extend the lifespan of steel components.
Black Oxide Coating
Black oxide treatment creates a thin, black protective layer on the steel surface to improve corrosion resistance and reduce light reflection. It is commonly used in automotive, aerospace, and tooling applications.

Investment Casting Samples

Investment Casting Materials

We specialize in creating precision castings that meet the stringent standards of various industries and meet diverse needs with our professional capabilities:
Material Coverage
Cast steel, stainless steel, alloy steel, aluminum alloy, copper alloy, high temperature alloy, etc., adapted to different working conditions.
Complete Technology
Master the core processes of wax casting, sand casting, lost foam casting, die casting, gravity casting, etc. to ensure the accuracy of castings.
Widely Used
The products can be used in pump and valve parts, rail transportation systems, automobile and motorcycle parts, aerospace parts, petrochemical equipment and other fields.
We always focus on durability, high performance and flexible customization, and strive to make every casting exceed application expectations.

Castings Products

Wax Model Precision Casting
Sand Casting
Lost Foam Casting
Die Casting and Gravity Casting
Stainless Steel

Due to its excellent durability and corrosion resistance, stainless steel has become one of the most popular materials in investment casting production. At Leierwo, we can cast various types of stainless steel, including martensitic stainless steel, ferritic stainless steel, austenitic stainless steel, precipitation-hardened stainless steel, and duplex stainless steel.

Alloy Steel

Alloy steel castings are steel castings alloyed with elements such as molybdenum, manganese, nickel, chromium, vanadium, silicon, and boron. Precision-cast alloy steel parts offer enhanced strength, hardness, wear resistance, and toughness. Typical alloy steel grades for precision casting include AISI 4130, AISI 4140, AISI 8620, and AISI 8630.

Carbon steel is an investment casting material that primarily contains carbon as the main alloying element. It is cost-effective, readily available, strong, wear-resistant, and easy to machine. These advantages make it a popular material for investment casting. Common carbon steel grades for investment casting include AISI 1020, AISI 1030, AISI 1035, AISI 1045, AISI 1060, Q235, and Q345.


Nickel-based alloys are also widely used in investment casting, consisting mainly of nickel along with other alloying elements. Nickel-based alloy castings are known for their exceptional corrosion resistance and strength. Due to their outstanding heat resistance, they are commonly used in high-temperature environments.

In addition to advanced casting technology, we implement strict quality control measures, including material certification, dimensional inspection, mechanical property testing, and even non-destructive testing (NDT) when required. Furthermore, we are ISO and TS 16949 certified, ensuring that our high-quality castings meet or exceed customer expectations.

How The Production Process Works

We want to make working with us on a production project as smooth and streamlined as possible.

1

Speak with a manufacturing expert who will help you customize your production quote around a complete bill of materials.

2

Work with our team to optimize your project for production, including design for manufacturability and cost reduction options.

3

An initial sample run of the part is manufactured and sent to you to ensure the part meets your standards before full production begins.

4

Gain process transparency and quality control when full production begins.

5

Apply post-processing and final quality measures before parts are shipped.

6

Place subsequent batch production orders for your project at any time through our virtual warehouse.

Start Your Project with Leierwo

1. Submit Your Inquiry
Send your CAD drawings and 3D files via email, specifying material grade, order quantity, surface finish, or any other relevant details.
2. Cost Calculation
Once we receive your design, our engineering team will carefully evaluate the drawings and calculate the price based on actual production costs as soon as possible.
3. Start Production
Upon pricing approval, our production team will prepare the materials and schedule production promptly. Leierwo always ensures on-time delivery.
4. Arrange Delivery
After production is completed, we will provide packaging details and arrange shipment via sea or air. We support global shipping for every order.

FAQ

We are a factory with over 20 years of experience in casting and machining. We have rich expertise in this industry. If you come across suppliers claiming to produce castings in a wide range of materials (such as steel, iron, stainless steel, copper, etc.), they are likely trading companies. If you see workshops actively producing parts, you can be assured that we are a genuine manufacturer.

Yes, as long as we receive CAD files or compatible 3D models that can be viewed with software like First Quote or Firstcut browser, we can provide a quotation. Please note that 2D drawings alone are insufficient for manufacturing precision components.

We support 3D CAD models from SolidWorks (.sldprt), ProE (.prt), and other CAD systems, commonly in IGES (.igs), STEP (.stp), ACIS (.sat), or Parasolid (.sat) formats.

We have an internal service system that responds to emails within 4 hours. If your request is urgent, please specify it in your email so we can prioritize your inquiry.

For rapid prototyping:
Silica sol casting: 20–30 days
Sand casting: 7–10 days
For mass production with machining included, the typical lead time is 45–60 days.
More complex parts may require a different delivery schedule.

Yes, we provide samples based on your drawings for you to confirm structure and quality. If the sample does not meet your requirements, we will replace it free of charge until it is qualified.

We accept T/T (bank transfer), Alipay, credit card, etc. Typically, we require a 30% down payment upon order confirmation and the remaining 70% before shipment. For custom parts with complex requirements, additional pricing terms may apply.

We have a comprehensive quality control system that covers every step, from raw material procurement to machining processes and final inspection. For critical components, we strictly follow drawing standards and customer specifications.

All customer data is kept confidential. Only trained engineers are authorized to handle production orders. Third-party inspection or factory audits are welcome, or you may use our in-house quality team for final inspection.

Yes, we guarantee that all materials used are 100% genuine and as specified.

We value long-term cooperation and support our customers’ production needs.

We believe every honest customer is a friend, and we treat our partnerships sincerely—building friendships and strong teams regardless of where our customers come from.

Contact us now

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