OEM Lost Wax Investment Casting Cast Iron CNC Machining Casting Centrifugal Pump Impeller Stainless Steel Casted Parts

Product Description

Product Name	Machinery Casting Parts
Standard /Non- Standard	Non-Standard Products
Material	Stainless steel
Classification	Machinery Casting Part
Process	Silica Sol Investment Casting +CNC machining
Certification	ISO9001:2015+SGS
Service	OEM/ODM One-Stop Service

 

 

Product General Specs:
Material	Austenitic stainless steel: 201, 303, 304, 316, 316L, 1.4581, scs14, scs16
	Hardened stainless steel:17-4PH, 410, 420, 440C
	Alloy cast steel: 4140, 4150, 4340, 8620, GS-25CrMo4
	Casting alloy tool steel: CS-2, CS-7, CrWMn
	Carbon steel: 1020, 1025(WCB), 1030, 1040, 1045, 1050
Weight	1g-30kg
Casting tolerance	CT4-CT7/GBT6414-1999; VDG Merkblad P690
Surface Roughness	Ra1.6-Ra6.3
Thickness	Min 2mm (1mm in Micro-region)
Casting Radius	Round radius ≥0.3mm, Internal fillet radius≥0.5mm
Blind Hole Depth	Max 30mm (Diamter 10mm)
Machining	Turning,Milling,Drilling,Boring,Threading, Grinding,CNC Machining & test equipment
Heat Treatment	Annealing,Hardening, Normalizing,Carburizing, Aging
Surface Finishing	Black Oxide,Black Coating,Anti-Pollution Flashover Coating,Mirror Polish
Industry Standards	ASTM, ICI, BS, DIN, JIS, ISO
Design Software	Pro-E, UG,Solidworks, AutoCAD
File Format	IGS, STP, XT, PDF, JPEG, JPG

Foshan Zeren Precision Casting Co., Ltd., founded in 2009 in Foshan, China, specializes in investment casting and CNC machining, offering comprehensive OEM solutions. Our facilities and expertise support a wide range of materials, including stainless steel, carbon steel, alloy steel, and nickel-based alloys, tailored to meet diverse industry needs.

We leverage 3D printing for rapid prototyping, enabling efficient, high-quality sample production while reducing mold-making time and costs. This technology provides flexibility for design adjustments and speeds up project timelines.

Certified to ISO 9001:2015 quality management standards, we ensure strict quality control from raw material selection to final inspection, delivering precision-engineered components for industries such as automotive, aerospace, and heavy machinery.

With over 30 years of experience, Foshan Zeren is known for innovation, reliability, and customer satisfaction. Our advanced technology, stringent standards, and responsive service make us a trusted partner for global casting solutions.

 

1. Direct Investment Casting Factory for Custom Solutions
We specialize in non-standard parts, removing middlemen to improve quality control and reduce costs.

2. Superior Silica Sol Casting Process
Silica sol casting delivers smoother, high-quality surfaces (Ra3.2) compared to water glass casting.

3. 30+ Years of Expertise in Investment Casting
Decades of lost wax casting experience ensure precision and reliability in every project.

4. Comprehensive One-Stop Casting and CNC Machining Services
We provide OEM/ODM customization, casting, and CNC machining under one roof for efficiency.

5. Cost-Efficient 3D Printing for Rapid Prototyping
3D printing enables quick, cost-effective sample production without molds.

6. Certified Quality and Compliance
ISO 9001:2015 and RoHS-compliant, we meet the highest quality standards.

7. Flexible Order Quantities and On-Time Delivery
Low order requirements and punctual delivery keep your projects on schedule.

8. Quality Assurance with Detailed Reports

Chemical testing and FAI reports ensure consistent, reliable quality.

In 2012, our company developed a product for HUAWEI: wrench casting-tool door and window hardware (as shown below), the material is A3 steel.

During the production process, we found the following problems: because the casting is easy to deform, subsequent shaping is difficult, and after the surface is polished, it needs to be plated with copper and then chrome-plated.
 

At the same time, electroplating will have a magnifying effect on surface defects, and sand holes are prone to occur, resulting in rework or even scrapping after final polishing. Therefore, we recommend only casting the head of the product.

The rear plane part is processed by steel plate and then butted together, which does not affect the performance of the product, and overcomes the above defects, and reduces the cost by about 50%.


In 2016, our company produced diffuser impellers (impeller accessories) according to the drawings provided by customers (as shown below), the material is 304 stainless steel.

This product contains five curved air-dissipating holes. It is very difficult to build the mold, make the shell and remove the sand, resulting in a high scrap rate.

In this regard, after research and discussion, our engineers decided to use a sand core material that not only has high temperature strength but also is easy to remove sand after high temperature, and finally perfectly solved the problem of curved hole casting.


In addition,there is also a steam valve (as shown below), the material is 316 stainless steel.

Due to the small opening and complex inner cavity, finally successfully solved the problem for the customer by using this sand core material, produced the product, and estab-lished a long-term good cooperative relationship with the customer.

In 2018, our company produced the pressure vent valve body (valve accessories) for customers (as shown below). The material is 316 stainless steel.

Because the opening is too small, the inner cavity is small and complicated, and it is almost impossible to clean the internal sand core, so we opened a square hole on the back of the product, welded it with a stainless steel square plate, and opened a dovetail groove at the weld, which is conducive to a strong weld.

We also used a sand core that has both high-temperature strength and is easy to remove sand after high-temperature action to make this product. After the casting was processed, the air-tightness test was carried out, and was successful, so the product was mass-pro-duced , and finally met the customer's requirements and won the trust of the customer.



In 2020,our company produced the main casting of the coffee pot-kitchenware and bathroom hardware for an ltalian customer(as shown below).The material is 316 stainless steel.

Through communication with the customer, we learned that the customer has verticality requirements for the center of the upper and lower parts of the casting, but due to the inner cavity of this product is complex, and it is impossible to make a mold as a whole.

Therefore, we divided the wax mold of the part into upper and lower parts and made them separately, and then assembled the wax molds of the upper and lower parts into a whole.

 

The combined wax mold successfully passed the verticality tooling inspection procedure, and finally all aspects of performance have met the customer's requirements, so the customer is very satisfied with our professional technical level and perfect product quality.

Our Thesis Published in Academic Journals:

Our company's technicians have more than 30 years of experience in the foundry industry.And we have also
      published 8 papers in casting industry professional academic journals.

 

(1) The"Prevention methods for shrinkage cavity and surface burr defects of investmentcastings"<2020 (7)>

 

(2)"Solutions of shrinkage in small castings with isolated hot joints"<2002,(2)>

(3)"Reconsideration Solutions for shrinkage in small castings with isolated hot joints"<2002, (6)>

 

The above 3 papers have directly rewritten this part of the textbook of casting majors in Chinese universities.

LOGISTICS: BY SEA/ BY AIR/BY LAND

PAYMENT: T/T Bank Transfer/ West Union/T/T/ L/C/ Credit card/PAYPAL

EXPRESS: TNT/ UPS/ DHL/EMS/ FEDEX

PACKAGING: Waterproof Polybag Inside Non-Fumigation Wooden Box or Carton Box, Pallet According to your request, provide one-stop shipping (door to door delivery)

Q1: What size products can you produce?

A: We can produce products of various sizes for different industries, weighing anywhere from a few ounces to as much as 250 pounds.

Q2: What materials can you cast? Can l OEM logo on the product?

A: We work with a variety of materials, including stainless steel, carbon steel, alloy steel, nickel-based alloy, duplex steel, heat-resistant and wear-resistant steel, etc. We can assist in material selection based on your specific requirements. Yes we can OEM logo.

Q3: What surface finish can be produced?

A: Ra3.2,and the machining finish can reach about Ra0.4. Other surface treatments can be done from electrophoresis, blackening, polishing, galvanizing to chrome plating, etc.

Q4: How to get sample?

A: Sample is acceptable. Please tell us what product you need.

Q5:What kind of CAD files can I send? How do I upload a CAD/large file to you?

A: You can send anything you run but the most beneficial are UG, STP,STEP or Parasolid. Please send us directly or to our email

Q6: What's your payment policy?

A: For the sample order, our payment policy is 100% T/T payment (Telegraphic transfer payment) in advance or other payment method. For the bulk order, our payment policy is 30% T/T in advance, 70% balance should be paid 7 working days before delivery.
 

Q7: What is delivery logistics?

A: We accept a variety of logistics methods. You can choose the most convenient or cost-effective way.
 

Q8: How long is your delivery time?

A: It depends on order quantity and specific requirements.Usually sample needs 7-10 days, mass order needs 20-50 days.