What does MSTFAB manufacture?

MSTFAB is the international brand of Guangzhou Maisituo Sheet Metal Manufacturing Co., Ltd. It makes drawing-defined sheet metal parts and empty mechanical enclosure shells for OEM buyers, using laser cutting, CNC bending, welding and mechanical assembly. Surface treatments such as powder coating may be coordinated with external partners depending on the order.

Which materials does MSTFAB work with?

Common options include carbon steel, galvanized steel, stainless steel and aluminum. Grade, thickness, dimensions, critical tolerances, hardware, finish and inspection criteria are specified per project on the approved drawing.

What are the MOQ and lead time for custom sheet metal parts?

There is no single MOQ or lead time that applies to every part. MOQ, price, achievable tolerances, lead time, finishing route and inspection deliverables are confirmed in the project quotation and purchase order after the drawing is reviewed.

Does MSTFAB supply electrical components or certified finished equipment?

No. The normal supply scope is fabricated metalwork and empty mechanical housings. Electrical components, wiring, software, system integration and final equipment certification remain with the buyer unless a written quotation or contract explicitly includes them.

How do I request a quote?

Send STEP, STP, DXF, DWG or PDF files with the drawing revision, material and thickness, quantity, critical dimensions, hardware, finish, inspection needs and delivery destination through the RFQ page at https://mstfab.com/contact/.

Medical Device Sheet Metal Enclosure Fabrication: ISO 13485 Standards | MSTFAB

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⚡ Direct Answer: What Distinguishes Medical Sheet Metal Fabrication?

Medical device sheet metal enclosure fabrication requires stringent hygiene, cosmetic perfection, and dimensional reliability. Housings for diagnostic analyzers, mobile surgical carts, and laboratory centrifuges demand sanitary-grade austenitic stainless steel (AISI 304/316L) or lightweight 5052-H32 aluminum. Crucial manufacturing requirements include: 100% full-penetration seamless TIG corner welds ground completely flush (Ra < 0.8μm) to eliminate bacterial harbor traps, chemical passivation per ASTM A967, hospital-grade antimicrobial powder coatings resistant to quaternary ammonium disinfectants, and complete material traceability under ISO 13485 compliance.

Medical Enclosure Standards & Fabrication Requirements

Design Attribute	Medical Device Standard	MSTFAB Engineering Execution
1. Cleanability & Hygiene	Zero crevices, cracks, or exposed threads where fluids can pool.	Seamless continuous TIG corner welds ground flush and blended to #4 sanitary grain finish.
2. Chemical Resistance	Resist daily wipe-downs with bleach, isopropyl alcohol, and Virex.	High-durability antimicrobial polyester/epoxy hybrid powder coatings baked at 200°C.
3. Cosmetic Surface Criteria	Class A aesthetic surfaces under 1000 lux illumination at 500mm distance.	Zero scratch, orange peel, or pitting defects; protective film maintained throughout assembly.
4. EMI / EMC Shielding	IEC 60601-1-2 medical EMC compliance for sensitive biosensors.	Selective conductive plating (Alodine / Electroless Nickel) and beryllium copper finger stock gaskets.
5. Material Traceability	100% heat lot tracking back to original certified steel mills.	Full material test reports (MTR) archived with batch certificates of conformance (CoC).

Senior engineer inspecting cosmetic surface finish on medical device housing at MSTFAB — Figure 1: MSTFAB quality engineer performing Class A cosmetic surface inspection on mobile ultrasound housing.

Flush Seam Welding and Surface Blending for Medical Housings

Unlike industrial power cabinets where cosmetic weld ripples are acceptable, medical diagnostic housings demand seamless exterior joints. Our welders use micro-TIG pulse welding to minimize the heat-affected zone (HAZ), preventing thin-gauge stainless steel warping.

Following welding, technicians use multi-stage pneumatic orbital sanders progressing through 80, 120, 240, and 320 grit abrasives before applying a directional Scotch-Brite™ grain match. The finished corner appears as a solid contiguous piece of metal with no detectable seam.

Precision TIG welding on medical analyzer stainless steel chassis — Figure 2: Cleanroom TIG welding operation on high-precision stainless steel laboratory centrifuge chassis.

Precision Medical Sheet Metal Enclosures Fabricated to Spec

Trust MSTFAB for sanitary stainless steel and aluminum medical housings. Complete material traceability, Class A cosmetic inspection, and full ISO 9001 quality systems.

Request Medical Device RFQ

Frequently Asked Questions on Medical Enclosures

Why is passivation essential for stainless steel medical enclosures?

Laser cutting, forming, and welding contaminate the surface with free iron and deplete chromium. Passivation (citric or nitric acid treatment per ASTM A967) chemically removes free iron particles and accelerates the formation of a continuous chromium-oxide passive barrier, preventing rust during sterilization cycles.

How do you protect internal electronic modules from ESD inside medical carts?

We use conductive grounding hardware, selective chromate conversion under mounting standoffs, and apply static-dissipative powder coatings with surface resistivity between 10⁶ and 10⁹ ohms/sq.