Polished Stainless Steel Precision Investment Casting Parts
Mirror polishing of stainless steel precision castings is a specialized surface treatment process. It transforms the metal surface into a highly reflective, mirror-like finish. This technique is widely used across various industries, including aerospace, medical equipment, automotive parts, and architectural design. These fields demand both exceptional visual quality and reliable functional performance.
Through this process, a surface roughness as low as Ra 0.01–0.05 μm can be achieved. The resulting castings offer excellent light reflectivity, enhanced corrosion resistance, and superior hygienic properties. These qualities make them particularly suitable for use in high-demand environments.
Basic Information
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Origin
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Hebei, China
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Brand
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Jarzoo
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Model
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custom
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Material
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Stainless Steel 304 316
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Technology
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Precision casting, mirror polishing
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Working Environment
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Anti-oxidation and corrosion resistant
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Size
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Customized
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Quality
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Durable and 100% inspection
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Minimum Order Quantity
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1 piece
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OEM
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Available
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Standard
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International
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Sample
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Available
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Tolerance
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Strict machining tolerance IT4-6
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Key Features
Precision Casting Technology:
Enables the production of stainless steel investment casting parts with complex geometries (e.g., thin walls, internal cavities, fine details) that are difficult to achieve with traditional machining. Net-shape or near-net-shape production reduces material waste and post-processing costs.
Material Excellence:
Manufactured from high-grade 304/316L stainless steel, these stainless steel precision casting components provide exceptional corrosion resistance, strength, and durability.
Superior Surface Finish:
Features a mirror polishing process that achieves refined finishes (Ra ≤ 0.8 μm) or brushed/satin textures. Enhances aesthetics, reduces friction, improves cleanability, and prevents bacterial growth—making it ideal for medical-grade stainless steel and other hygienic applications.
Dimensional Accuracy:
Maintains tight tolerances (as precise as ±0.05 mm), ensuring that each investment casting polished component integrates seamlessly into assemblies and meets demanding performance requirements.
Process Technology
Precision Casting Foundation
Stainless steel precision castings, also known as investment castings, are manufactured using the lost-wax casting process. This method ensures high dimensional accuracy, with tolerances as tight as ±0.1 mm, and minimal surface defects.
Such quality provides an excellent foundation for the subsequent mirror polishing process, significantly reducing the amount of material that needs to be removed in the finishing stages.
Multi-Stage Polishing Sequence
- Mechanical Grinding: The process begins with coarse grinding to eliminate casting marks, weld seams, and other irregularities. Abrasive belts or wheels (ranging from 80 to 400 grit) are typically used at this stage.
- Fine Polishing: Next, intermediate polishing is carried out using diamond or ceramic abrasive pastes (e.g., 800–3000 grit). This refines the surface to a uniform semi-gloss and removes any scratches from previous grinding.
- Mirror Finishing: The final stage involves ultra-fine abrasives (such as 5000–8000 grit) or chemical-mechanical polishing (CMP) to achieve a flawless mirror finish. For critical applications- such as aerospace casting parts or medical-grade stainless steel products - electropolishing is often added to improve surface uniformity and corrosion resistance.
Electropolishing Enhancement
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Technical Specifications
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Category
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Specification Details
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Material Grades
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304 Stainless Steel: General-purpose corrosion resistance
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316L Stainless Steel: Superior pitting/crevice corrosion resistance (ideal for marine/medical use)
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17-4 PH Stainless Steel: High strength/hardness for aerospace/tooling applications
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Surface Finish Options
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Mirror Polish (Ra ≤ 0.2 μm): Decorative/optical applications
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Satin Finish (Ra 0.4–0.8 μm): Reduces fingerprints/scratches
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Bead Blasted: Matte texture for non-reflective surfaces
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Tolerances
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Linear Dimensions: ±0.05 mm (standard), ±0.02 mm (precision-grade)
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Wall Thickness: As thin as 0.5 mm (design-dependent)
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Certifications
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Compliant with ASTM A276, ASTM A479, ISO 9001, and FDA/EU food-grade standards (medical/food applications)
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Applications
- Aerospace: Mirror-polished turbine blades, engine casings, and satellite optical components to enhance performance and reflectivity.
- Medical: Surgical instruments, endoscopic parts, and dental implants that require superior biocompatibility and effortless sterilization.
- Automotive: Exhaust tips, trim accents, and headlight reflectors tailored for premium vehicle brands, combining aesthetics with functionality.
- Architecture: Cladding panels, handrails, and sculptures designed for high-end commercial and residential projects, offering durability and visual appeal.
Key Advantages
- Aesthetic Excellence: The mirror polishing process delivers a luxurious, high-end appearance, significantly elevating product value.
- Corrosion Resistance: By eliminating microscopic surface imperfections, the polished surface minimizes areas where moisture and corrosive agents could accumulate.
- Hygienic Properties: The ultra-smooth, non-porous finish prevents bacteria and contaminants from adhering to the surface.
- Functional Benefits: The flawless surface achieved through polishing ensures accurate and consistent light reflecti
Selection Guide
1. Material Grade
Select the appropriate medical-grade stainless steel or marine-grade alloy according to corrosion resistance needs and operating conditions.
- 304/304L Stainless Steel:Suitable for indoor applications with moderate corrosion resistance requirements. Typical uses include architectural cladding and decorative fixtures.
- 316/316L Stainless Steel:Ideal for coastal or chemical environments. Its molybdenum content enhances resistance to pitting and crevice corrosion.
- Duplex Stainless Steel (e.g., 2205):Combines high strength and excellent corrosion resistance, making it suitable for structural parts in offshore and industrial settings.
2. Surface Finish
Choose from different finishing techniques based on functional and aesthetic requirements. The mirror polishing process is recommended for applications requiring low friction and easy cleaning.
3. Certification Needs
Ensure components meet industry standards such as ASTM, ISO, or FDA, particularly for use in medical, aerospace, and food industries.
Quality Control
1. Surface Roughness Measurement
Profilometers are used to ensure surface roughness meets specified requirements, such as Ra ≤ 0.05 μm for a high-quality mirror finish.
2. Visual Inspection
Components are examined under controlled lighting to identify surface defects, including orange peel, holograms, and scratches.
3. Corrosion Testing
Durability is validated through standardized tests such as salt spray testing (ASTM B117) and electrochemical impedance spectroscopy (EIS).
Mirror polishing of stainless steel precision castings exemplifies the highest standard of metal surface finishing. By integrating advanced manufacturing methods with stringent quality control, the process produces components that excel both functionally and aesthetically.
As industry requirements increasingly emphasize superior performance and refined visual appeal, mirror polishing will continue to play an essential role in high-value applications.
Packaging & Delivery
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Selling Unit
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Single item
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Gross Weight per Item
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0.500 KG
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Single Package Size
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10X10X15 cm
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Custom Services
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Customization Options
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Minimum Order Quantity
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Custom Logo
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100 pieces
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Custom Packaging
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100 pieces
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Graphic Customization
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100 pieces
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Product Customization
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100 pieces
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Why Choose Jarzoo?
Hebei Jarzoo Metal Products Co., Ltd. is a specialized factory focused on producing castings. Since the 1990s, we have been part of the precision casting industry in Cangzhou, known for its rich casting heritage and strategic location near major cities like Beijing and Tianjin, ensuring efficient logistics.
- Comprehensive Production Line – From mold design to casting, machining, and surface treatment.
- Advanced Equipment & Skilled Team – Ensuring precision manufacturing and reliable quality.
- Expert Design Support – Providing professional advice to meet diverse customer needs.
- Order Tracking & Feedback System – Prioritizing customer input for continuous improvement.
- Dedicated Sales & After-Sales Service – Building long-term trust and strong client relationships.
- Open Collaboration – Welcoming customer visits and exploring mutually beneficial partnerships.
If you have any questions,please feel free to contact us. There are professional service staff to serve you.
FAQs
Q1: What is your delivery time?
Typically, samples are delivered within 25 working days, and bulk production takes 60 working days.
Q2: What are your payment terms?
For payments up to $1,000, full payment is required in advance. For payments of $1,000 or more, a 30% T/T payment is required in advance, with the balance due before shipment.
Q3: What products do you need from customers?
We can customize products based on your drawings and samples.
Q4: Do you have traceability capability?
Yes, tested samples will be stored in our laboratory for at least two years.
