Products Description
In medical devices, semiconductor equipment, new energy battery structural components, chemical valves, and high-end industrial sensors, milling 303 stainless steel has become the preferred metal solution for harsh environments due to its excellent corrosion resistance, biocompatibility, mechanical strength, and surface workability. Unlike casting or stamping processes, CNC machining can achieve complex geometries, tight tolerances, and high surface integrity, making it particularly suitable for applications with small batches, high added value, or extremely high cleanliness requirements.
Detailed Specifications
Machining Precision
steel CNC machining parts are precisely dimensional, with a positioning accuracy of ±0.05mm and a dimensional tolerance of ≤±0.003mm. The surface is burr-free and defect-free. Complex structures and hole positions are accurately replicated, allowing for direct assembly and improving efficiency and stability.
Electropolishing and Surface Gloss Details
The electropolishing film is uniform, with a roughness accuracy of Ra0.2μm (mirror-grade), free of scratches and color differences. The metallic luster for stainless steel CNC parts is full and uniform, the passivation layer has strong adhesion, and it is corrosion-resistant and oxidation-resistant, maintaining its gloss over long-term use.
Assembly Details
The stainless steel CNC milling structure fits perfectly to assembly requirements, with precise positioning and tight assembly without looseness. The surface is clean and residue-free, suitable for clean environments such as medical and electronic applications. Clear product labeling facilitates customer traceability, acceptance, and classification management.
Raw material advantages
| 303 | Free-machining austenitic stainless steel; sulfur content improves machinability. Suitable for high-precision, complex stainless steel machining parts, but its corrosion resistance is slightly lower than 304. |
| 304 (18Cr-8Ni) | General-purpose austenitic stainless steel with excellent corrosion resistance and formability. Widely used in food equipment, electronic structures, and general stainless steel CNC milling. |
| 316 | Based on 304, molybdenum is added, resulting in even stronger corrosion resistance. Suitable for chemical equipment and marine environments. |
| 420 | Martensitic stainless steel; high hardness can be achieved through heat treatment. Commonly used in cutting tools and wear-resistant structural stainless steel CNC parts. |
Delivery and Packaging
Regarding delivery timelines, we have established a tiered response mechanism to meet the needs of different project stages. Free steel CNC machining parts samples can typically be completed and shipped within 1–2 days; for new mold development, the sample lead time is 20–30 days (including mold manufacturing and sample verification); for bulk orders, the standard delivery time is 15–20 days after order confirmation and payment, ensuring stable project progress.
For stainless steel CNC parts, we employ a multi-layered protective packaging solution: an inner layer of pearl cotton cushioning, an outer layer of thickened cardboard box sealing, and pallet support for secure mounting; the entire product is wrapped in a moisture-proof film and reinforced with cable ties, effectively preventing risks from transportation vibration, moisture, and displacement, suitable for sea freight and long-distance international shipping environments.
contact us
For support of high-strength, corrosion-resistant milling 303 stainless steel, we can provide material selection and process optimization suggestions based on your technical drawings. Please contact us for detailed solutions and quotations.
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