Stainless steel is an alloy containing at least 10.5% chromium. It possesses excellent corrosion resistance, high strength, and plasticity. It is an indispensable foundational material in modern industry. QD is a professional manufacturer and exporter of stainless steel castings. If you have stainless steel needs, please contact QD.
Stainless Steel: Classification and Analysis of Common Grades
- Martensitic stainless steel: Contains a high carbon content. High strength is achieved through heat treatment. Moderate corrosion resistance is achieved. Suitable for mechanical parts requiring high hardness.
- Austenitic stainless steel: Contains high amounts of nickel and chromium. Excellent corrosion resistance and toughness are achieved. Excellent low-temperature performance and weldability are also provided. This is the most widely used type.
- Ferritic stainless steel: Contains high chromium content and contains no nickel. Low cost and excellent corrosion resistance are achieved. Suitable for decorative applications, home appliances, and other applications.
- Duplex stainless steel: Combines the advantages of austenitic and ferritic stainless steels. High strength and corrosion resistance are achieved. Suitable for harsh environments.
| Grades | Classification | Advantages | Applications |
| 304 | Austenite | General corrosion resistance. Good weldability | Food equipment, daily necessities |
| 304L | Austenite | Low carbon content. Reduces the risk of intergranular corrosion | Welded structural parts |
| 316 | Austenite | Contains molybdenum. Resistant to salt spray and chemical corrosion | Marine engineering, medical equipment |
| 316L | Austenite | Ultra-low carbon. Excellent welding performance | Chemical pipelines, precision instruments |
| 430 | Ferrite | Resistant to atmospheric corrosion. Magnetic stability | Home appliance panels, kitchenware accessories |
| 2205 | Duplex | High strength. Chloride ion corrosion resistance | Seawater treatment, oil and gas equipment |
| 17-4PH | Martensite | Ultra-high strength. Heat treatment strengthened | Aviation accessories, high-pressure valves |
Stainless Steel: Representative Casting Products
Stainless steel castings are widely used in several key industries:
Medical and Healthcare Industry
Representative products include surgical instrument accessories and medical device connectors.
These castings must meet extremely high standards of hygiene and corrosion resistance. QD manufactures medical-grade stainless steel vascular dilators that adhere to strict biocompatibility requirements, ensuring safe use.
Food Processing Industry
Representative products include food machinery transmission components and filling equipment valves.
These components must withstand repeated cleaning and corrosion from food media. QD’s food-grade castings meet hygienic certification standards.
Marine Engineering Industry
Typical castings include marine pipe joints and offshore platform fasteners.
They must withstand long-term seawater corrosion. QD’s marine stainless steel umbrella anchors are designed to withstand harsh marine environments.
Chemical Equipment Industry
Representative products include reactor accessories and chemical pump impellers.
QD’s chemical castings must withstand corrosion from various chemical media to ensure long-term, stable operation of these equipment.
Auto Parts Industry
Key castings include engine mounts, exhaust flanges, and brake system components.
They require high strength, temperature resistance, and fatigue resistance. QD’s auto parts castings meet the reliability requirements for long-term vehicle operation.
Precision Casting Technology and Quality Control
QD utilizes advanced investment casting technology.
The process includes wax pattern creation, shell formation, melting and pouring, shell removal, and cleaning.
This process accurately produces complex structures, achieving near-net shapes and minimizing subsequent processing.
Professional post-processing technology
| Process Type | Process Effect | Applicable Scenarios |
| Electrolytic polishing | Mirror surface effect. Improve corrosion resistance | Medical and food equipment |
| Sandblasting | Uniform matte texture. Enhanced wear resistance | Mechanical transmission parts |
| Passivation treatment | Forms a protective film. Extends service life | Outdoor equipment castings |
| Electroplating | Enhance surface hardness and beautify appearance | Decorative structural parts |
QD has its own independent factory equipped with a fully automatic polishing production line to ensure consistent dimensional accuracy and precise control of surface roughness.
Full-process quality control system
From incoming raw material inspection to finished product inspection, QD follows standardized processes and strictly controls quality. We are also equipped with testing equipment such as spectrometers and metallographic microscopes. Ensure stable and reliable casting quality.
QD Stainless Steel Castings: Application Advantages
Material Compatibility: We can match various grades, including 304, 316, and 2205, to meet the needs of different industries, achieving a balance between performance and cost.
Structural Precision: Precision casting processes can meet the forming requirements of complex cavities and thin-walled structures.
Environmental Adaptability: We provide customized solutions for high-temperature, high-humidity, and highly corrosive environments, ensuring the long-term stable operation of castings. QD supports both standardized general-purpose parts and customized complex parts.
QD: Your Reliable Partner
QD is a professional manufacturer of stainless steel castings. We offer two core advantages:
- Comprehensive Material Spectrum: We are well-versed in the characteristics of various stainless steel grades. We accurately recommend the optimal material solution based on the customer’s application scenario.
- Full-Process Technical Support: We provide comprehensive control from process design, manufacturing, to post-processing, ensuring that castings meet performance standards.
QD always puts our customers first, providing cost-effective casting solutions. We utilize an integrated industry and trade model, enabling rapid response to customized surface treatment requests and tailoring tailored post-processing solutions. If you have stainless steel casting needs, please contact QD.
FAQ
1. Does the precision casting process significantly impact casting accuracy?
Yes, it does. It can achieve near-net-shape results for complex cavities and thin-walled structures. This reduces post-processing and ensures precise dimensions.
2. What are the key post-processing processes for stainless steel castings?
These include electropolishing (for increased corrosion resistance), sandblasting (for enhanced wear resistance), and passivation (for extended life). Customization is available upon request.
3. How do different types of stainless steel differ in their specific applications?
- Austenitic stainless steels (such as 304 and 316) offer excellent corrosion resistance and are suitable for use in humid environments and food applications.
- Martensitic stainless steels (such as 17-4PH) offer high strength and are suitable for high-strength parts.
- Duplex stainless steels (such as 2205) offer a balance of corrosion resistance and strength and are used in harsh environments.
4. Do scratches on the surface of stainless steel castings affect corrosion resistance?
Minor scratches generally have no impact. Stainless steel has a self-healing property, allowing the oxide film to reform at the scratched area. However, deep scratches require prompt treatment to prevent further localized corrosion.
5. Do stainless steel castings require maintenance after use? How should they be maintained on a daily basis?
Simple maintenance is required. Clean with water or a neutral detergent daily. Avoid prolonged contact with strong acids or alkalis.
Castings used outdoors should be regularly inspected for surface condition. Passivation should be performed as necessary.