Stainless Steel Castings

Stainless steel casting is a manufacturing process that involves pouring molten stainless steel into a mold to create custom stainless steel components. We specialize in producing high-quality stainless steel castings for a wide range of industries, including construction machinery, marine, oil and gas, automotive, and other heavy equipment sectors.
Our capabilities include stainless steel investment casting and stainless steel sand casting, offering the flexibility to produce stainless steel castings that meet diverse design and performance requirements. With advanced techniques and strict quality control, we ensure that each stainless steel casting delivers precision, durability, and excellent corrosion resistance.
Whether you need complex, intricate parts or large, heavy-duty components, our stainless steel castings are tailored to meet your specific needs, providing reliable solutions for demanding applications.
Maximum Size: 200cm × 200cm
Weight Range: 0.1 kg – 2 tons
Annual Capacity: 2,400 tons
Shell Building Binder: Silica Sol
Tolerance: As per requirements
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Stainless Steel Castings

Common Material Grades of Stainless Steel Castings

ALLOY CLASSALLOY NAMEMECHANICAL PROPERTIESMATERIAL CHARACTERISTICSAPPLICATION INDUSTRYEXAMPLE PART
Austenitic304 stainless steelTensile Strength: 515-690 MPa
Hardness: 70-92 HRB		Corrosion resistance (high nickel)
Ductility (low carbon content)
Widely used
Universal pump components for the water treatment and food industries.		Food Processing, KitchenKitchen sinks, Process equipment (e.g., tanks)
Austenitic304L stainless steelTensile Strength: 485-655 MPa
Hardness: 70-88 HRB		Lower carbon for weldability
Improved ductility
Universal pump components for the water treatment and food industries.		Chemical, Oil & GasProcess equipment, Heat exchangers
Austenitic316 stainless steelTensile Strength: 515-690 MPa
Hardness: 75-95 HRB		Molybdenum-enhanced corrosion resistance
The pump casing, impeller and shaft are preferred and are resistant to corrosion by acids, alkalis and chloride ions.		Paper industry, Chemical processing, PharmaceuticalPropellers, Medical devices, Furnace parts
Austenitic316 stainless steelTensile Strength: 485-655 MPa
Hardness: 75-95 HRB		Optimized weldability
Enhanced corrosion resistance
The pump casing, impeller and shaft are preferred and are resistant to corrosion by acids, alkalis and chloride ions.		Marine, ChemicalMarine components, Chemical vessels
Austenitic201 stainless steelTensile Strength: 620-795 MPa
Hardness: 70-88 HRB		Cost-effective (reduced nickel content)Construction, AutomotiveStructural components, Springs
Duplex2205 stainless steelTensile Strength: 620-800 MPa
Hardness: 20-35 HRC		Dual-phase structure
Stress/corrosion resistance
High strength, high pitting corrosion resistance, suitable for seawater pumps and chemical pumps.		Oil & Gas, ChemicalPipes, Pressure vessels
Martensitic410 stainless steelTensile Strength: 450-655 MPa
Hardness: 70-85 HRB		Heat-treatable
Machinability		Aerospace, FirearmsAircraft components, Bolts, Mechanical parts
PH17-4PH stainless steelTensile Strength: 725-930 MPa
Hardness: 30-45 HRC		Precipitation-hardened
High strength-to-weight ratio		Aerospace, MedicalAircraft landing gear, Surgical instruments
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Stainless Steel Casting Products

Pipeline Pump Motor HousingFlange Vertical Automatic Check Valve BodyAutomatic Pressure Control Regulating Valve BodyManual Steam Carbon Steel Stop ValveButterfly Valve PartsCentrifugal Pump ImpellerCentrifugal Pump CasingChemical Pumps Body

Stainless Steel Casting Process

Stainless Steel Investment Casting
By fully adopting advanced silica sol shell-making technology, we have significantly improved the accuracy, surface finish, and overall performance of our stainless steel castings. Additionally, we have introduced a shell-making process combined with coated sand to further optimize production efficiency and ensure the highest quality standards. This process allows us to produce stainless steel castings with intricate designs and exceptional precision, making them ideal for demanding industrial applications.
Stainless Steel Sand Casting
In the sand casting process, we select sand mold materials, such as resin sand and ceramsite sand, based on customer performance requirements. Ceramsite sand, known for its uniform particles and excellent refractory properties, is particularly suitable for high-temperature and challenging casting applications. We strictly follow post-inspection and recycling processes to ensure the quality of the sand molds and the stainless steel castings produced. Our goal is to consistently meet customer demands for high-quality and reliable stainless steel castings.
Stainless Steel Shell Mold Casting
Our shell mold casting production line is equipped with the latest imported machinery, including eight automated units capable of manufacturing stainless steel castings weighing up to 200 kg. With a monthly production capacity of 800 tons, our experienced team ensures both efficient production and rigorous quality inspection. This allows us to deliver stainless steel castings that meet the highest standards of precision, durability, and performance for a wide range of industrial applications.

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Heat Treatment
Heat treatment is a process that alters the properties of metals or alloys by controlling heating and cooling. This enhances hardness, strength, and corrosion resistance, ensuring that stainless steel castings meet the required performance standards. Our primary methods include normalizing, annealing, and tempering, tailored to optimize the mechanical properties of stainless steel castings for various industrial applications.
Post-Machining
Although stainless steel precision castings can achieve high dimensional accuracy and surface finish, some applications require additional machining to meet strict tolerance and surface finish requirements. Our professional machining services enable us to manufacture stainless steel castings with complex geometries and intricate details while maintaining high precision and accuracy. Equipped with a full range of machining equipment, from manual turning and milling to advanced CNC machining services, we ensure that every stainless steel casting meets exact specifications.
Surface Treatment
To enhance the performance and appearance of stainless steel castings, we apply various surface treatment methods, including rust-proof oil coating, painting, sandblasting, chemical treatment, anodizing, and electrophoresis. These treatments improve corrosion resistance, enhance wear resistance, and provide a polished finish, ensuring that our stainless steel castings deliver both durability and aesthetic appeal.

Success Case Display

Customized 316 stainless steel flange for Mexican customers
Customer Needs:
A Mexican crude oil company required a custom-made 316 stainless steel flange (DN300 PN16) that was resistant to seawater corrosion, suitable for temperatures up to 50°C, and had a tolerance of ±0.1mm.
Our Solution:
1.The corrosion resistance of 316 steel is explained, and the sealing surface structure is optimized (widened to 15mm) through the casting process.
2.Dimensional tolerances and sealing surface flatness are ensured through investment casting and CNC machining.
3.Comprehensive testing, including spectral analysis, ensures that the material meets all standards.
Results and Feedback:
Delivery: The customized product and test report were successfully completed and delivered five days ahead of schedule.
Customer Comment: “The 316 material met the standards, and the delivery was five days ahead of schedule, helping us successfully pass the final acceptance inspection.”
Subsequent Cooperation: “The flange has been leak-free for three months after installation, leading to an additional order for 200 sets.”

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.

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