Our Story
From Master Polisher to
Precision Casting Leader
The HuayunCast story begins not with a furnace, but with a polishing wheel — and a founder who believed that the finish on a part tells the truth about everything that came before it.
Polishing is in Our DNA
We Didn't Start with Machines.
We Started with Hands.
Polishing is the most critical and unforgiving step in high-end stainless steel fabrication. A Ra < 0.2μm mirror finish cannot be faked — it is the result of every upstream decision made correctly. Mr. Sang spent years mastering this discipline before founding HuayunCast.
When he could no longer guarantee the surface quality he demanded from third-party casting suppliers, he made the decision that defines the company to this day: build the foundry himself. Backward integration was not a business strategy — it was a quality imperative.
Today, HuayunCast controls every step from alloy selection and wax pattern injection through investment casting, CNC machining, and final polishing. The result is a part that arrives at your facility ready for assembly — not for rework.
We are not a trading company. We are not a broker. Every part we quote is made in our own facility, by our own team, under our own ISO 9001:2015 quality system. When you send us a drawing, you are talking directly to the factory that will make it.
Silica Sol Investment Casting
Our core process. Delivers superior surface finish (Ra 3.2–6.3μm), tight tolerances (ISO 8062 CT4–CT6), and zero porosity — ideal for pressure-critical and corrosion-resistant applications.
In-House CNC Machining Center
Post-casting CNC turning, milling, drilling, and grinding to ±0.01mm achievable. One-stop service eliminates inter-supplier handoffs and reduces total lead time by up to 30%.
Material Traceability & NDT
Every heat verified by OES Spectrometer. EN 10204 3.1 MTCs issued as standard. NDT options: PT, UT, X-Ray on request. 100% pressure testing for valve and pump parts.
ISO 9001:2015 Quality System
Full quality management system covering incoming material inspection, in-process control, CMM dimensional verification, and final inspection. PPAP documentation available.
Mr. Sang
Founder & Chairman, HuayunCast
"Quality isn't a department; it's a commitment."
Founder Spotlight
The Man Who Built a Foundry
to Protect a Finish
Mr. Sang's career began on the polishing floor — not in a boardroom. As a Polishing Workshop Director, he developed an eye for surface quality that most foundry managers never acquire. He could identify a casting defect by the way light reflected off a finished part.
That expertise became the foundation of HuayunCast's competitive advantage. When international clients like Q-railing (Germany) required components that met European EN 1090 and TÜV standards, Mr. Sang's team was already operating at that level — because the polishing standard demanded it.
His philosophy is simple: every part that leaves this factory must be one we would be proud to put our name on. That standard has not changed since the first day of production.
Company Milestones
Three Chapters. One Standard.
Chapter One
Polishing Workshop Roots
Mr. Sang began his career as a Polishing Workshop Director — mastering the most demanding and unforgiving step in stainless steel fabrication. He understood that a Ra < 0.2μm mirror finish cannot be faked; it is the proof of every upstream decision made correctly.
Chapter Two
Establishing the Full Foundry
To guarantee the Olympic-grade surface finish Mr. Sang demanded, HuayunCast expanded backward into its own investment casting foundry. Vertical integration was not a business strategy — it was a quality imperative. One factory. Full process control. Zero quality gaps between suppliers.
Chapter Three
Becoming a Global OEM Partner
As the exclusive OEM manufacturing partner for Q-railing (Germany) and a supplier for the Rio 2016 Olympics Media Center, HuayunCast adopted German quality standards from day one. This partnership set the bar for everything we do — precision, durability, and flawless aesthetics.
Materials
8 Alloy Grades. All Verified by OES Spectrometer.
| Grade | EN Equivalent | Typical Application |
|---|---|---|
| 304 / 304L | 1.4301 / 1.4307 | General purpose, food-grade, architectural |
| 316 / 316L | 1.4401 / 1.4404 | Marine, chemical, pharmaceutical |
| CF8M (316 cast) | 1.4408 | Valve bodies, pump casings, pressure parts |
| CF3M (316L cast) | 1.4409 | Low-carbon, weldable valve & pump parts |
| 17-4 PH (630) | 1.4542 | High-strength aerospace & industrial parts |
| Duplex 2205 | 1.4462 | High-corrosion, offshore, subsea hardware |
| 420 / 440C | 1.4021 / 1.4125 | Cutlery, surgical, wear-resistant parts |
| Carbon Steel | 20C–50C | Mechanical assemblies, structural parts |
All materials supplied with EN 10204 3.1 Mill Test Certificates. OES Spectrometer verification on every heat.
Quality Assurance
Certifications & Standards
ISO 9001:2015
Full quality management system covering design review, in-process control, and final inspection.
EN 10204 3.1 MTC
Mill Test Certificates issued as standard for every order. Material traceability from heat to finished part.
NDT Capabilities
PT, UT, X-Ray available on request. 100% pressure testing for valve and pump components.