ISO 9001 Certified · Investment Casting + CNC Machining
OEM Stainless Steel Casting Manufacturer:
China Factory Direct — Drawing to Part.
Specialized in complex geometries, tight tolerances (±0.01 mm), and superior surface finishes. Get your technical quote within 24 hours.
Trusted By
Supplying Components to Global Brands
Lighting, Marine, Automotive & Electronics — across 30+ countries
Our OEM Capabilities
Casting + Machining Under One Roof
Investment Casting
Silica Sol process for superior structural integrity and Ra 3.2 surface finish. Suitable for complex geometries, thin walls, and tight tolerances.
CNC Machining
In-house 4/5-axis centers for precision milling, drilling, and tapping. Tolerances to ±0.01 mm. CMM inspection on every critical dimension.
Materials
304, 316, 316L, 17-4PH, 410, 430, and Duplex Stainless Steel. Carbon steel and alloy steel available on request.
Quality Assurance
Why Engineers Choose Huayun
DFM Review
Free Design for Manufacturing analysis included with every quote. We identify wall thickness issues, draft angles, and machining requirements — and suggest cost-saving modifications before tooling is cut.
Strict QC
Spectrometer analysis for material verification, CMM dimensional inspection to drawing, and 100% pressure testing on fluid-control parts.
Full Traceability
Every shipment includes a 3.1 Mill Test Certificate (MTC) per EN 10204. Heat number, chemical composition, and mechanical properties documented.
How It Works
3 Steps from Drawing to Delivery
Inquiry
Submit Your Drawing
Upload your STEP, IGS, or PDF drawings. No drawing yet? A sketch or sample part is fine — we'll reverse-engineer it.
Analysis
DFM Review & Quote
Our engineers run a free DFM analysis and return a detailed technical quote within 24 hours. Includes material recommendation, tolerance feasibility, and unit price.
Delivery
Prototype → Mass Production
Rapid prototyping in 15–20 days. After first-article approval, mass production runs of 50–50,000 pcs with full QC documentation.
Product Gallery
Raw Casting → Precision Machined
Every part starts as a raw investment casting with Ra 3.2 surface finish, then moves through our in-house CNC machining centers for final tolerances and surface treatment.
Raw Investment Casting
CNC Machined & Mirror-Finish
SS316 Cross Pipe Fitting
Diverse OEM Precision Parts
Precision Casting Component
Stainless Steel Cast Part
Images sourced from our manufacturing partner's production floor. Custom parts produced to your drawings.