Tooling & engineering
Die design, mould-flow and casting simulation before steel is cut, so the first article is a real sample, not a trial run.
We pour stainless steel, carbon steel and alloy steel investment castings, finish them on our own CNC lines, and verify them with CMM, spectrometer and leak testing — so your part leaves as a finished component, not a raw casting.
Send Your Drawing See the ProcessMost buyers lose time coordinating a foundry, a machine shop and an inspection house. We run all three under one roof, on one production order.
Die design, mould-flow and casting simulation before steel is cut, so the first article is a real sample, not a trial run.
PLC wax injection, automated slurry dipping and sand shower, autoclave de-wax, high-frequency melting and pouring.
In-house turning and milling take the casting to final tolerance, including threading, facing and assembly features.
CMM measurement against your drawing, with first-article and in-process checks recorded per production order.
Optical emission spectrometer on every heat, so chemistry is confirmed before the metal reaches the shell.
Pressure and leak testing for fluid-carrying parts such as valve bodies, faucet bodies and pipe fittings.
Our core experience is stainless steel parts that must hold pressure, thread cleanly, and still look right after polishing.
Bodies, spouts and handles in polished stainless steel.
Elbows, tees, unions and threaded connectors.
Pressure-carrying bodies, covers and impeller components.
Buckles, rings and stainless steel horse tack hardware.
Chang Gu has been committed to the development and production of high-quality, high-performance precision castings since 2009. Our strategy combines market orientation, innovation, skilled people and efficiency — merging metallurgical technology with investment casting and digital production control.
Twelve stages, filmed and photographed on our own line: wax injection, shell building, de-wax, melting and pouring, machining, inspection and packing.
It answers in English, Chinese and Vietnamese, using our published process, material, inspection and quotation information. If it does not know, it says so and points you to a person.
Open the assistantSend a 2D drawing or 3D model with material, quantity and market. You get a manufacturability review and a price.
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