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/.

RoHS Galvanized Automation Distribution Box Shells: Compliance Guide | MSTFAB

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⚡ Direct Answer: How to Ensure 100% RoHS Compliance for Galvanized Automation Shells?

Achieving full EU RoHS 2 (Directive 2011/65/EU) and RoHS 3 (Directive 2015/863) compliance for galvanized automation distribution box shells requires rigorous material controls: 1) Trivalent Chromium (Cr3+) or Cr-Free Passivation on hot-dip galvanized steel, completely banning toxic hexavalent chromium (Cr6+ <1,000 ppm); 2) Lead-Free Fasteners: Strict compliance on all PEM studs, blind nuts, and zinc-plated latches (Pb <1,000 ppm; brass components <4% Pb under Exemption 6c); 3) Phthalate-Free Polyurethane Gaskets; and 4) Traceable Material Declarations & XRF Screening Reports accompanying each production batch.

RoHS Restricted Substances Threshold & Sheet Metal Audit Matrix

Restricted Substance	RoHS Maximum Threshold	Sheet Metal Component Risk Zone	MSTFAB Prevention & Test Protocol
Hexavalent Chromium (Cr VI)	<0.1% (1,000 ppm)	Galvanized coil chemical passivation; yellow zinc conversion coatings.	100% Cr3+ eco-friendly clear passivation; spot colorimetric test per IEC 62321.
Lead (Pb)	<0.1% (1,000 ppm)	Zinc die-cast latches, free-machining brass standoffs, solder seams.	Lead-free zinc alloy castings; genuine PennEngineering PEM stainless fasteners.
Cadmium (Cd)	<0.01% (100 ppm)	Bright metallic electroplating, yellow powder coat pigments.	Cadmium-free zinc electroplating baths; Qualicoat certified non-toxic pigments.
Phthalates (DEHP, BBP, DBP, DIBP)	<0.1% (1,000 ppm each)	Plastic cable gland grommets, flexible rubber seals, vinyl wiring duct.	SGS certified phthalate-free polyurethane FIPFG foam; pure silicone grommets.

RoHS compliance documentation and XRF material test certificate for galvanized steel — Figure 1: Certified RoHS testing documentation and raw steel mill chemical breakdown report.

XRF Spectrometry Screening & BOM Level Traceability

European export customs and tier-1 automation OEMs enforce zero tolerance for hazardous substances. MSTFAB validates compliance via:

Incoming Coil XRF Testing: Handheld X-ray fluorescence (XRF) analyzers verify zero heavy metal contamination on every incoming master steel coil.
Chemical Tank Titration Logs: Automated pre-treatment wash tanks use non-chrome zirconium conversion chemistries audited daily.
Full Bill of Materials (BOM) Declaration: Comprehensive IPC-1752A declaration forms provided with every shipment.

PEM self-clinching hardware installation with RoHS compliance verification — Figure 2: Automated insertion of certified lead-free PEM studs and threaded standoffs.

Guaranteed RoHS Compliant Enclosure Fabrication

Exporting automation machinery to Europe or the US? MSTFAB delivers 100% RoHS & REACH certified galvanized enclosures with complete third-party lab documentation.

Request RoHS Compliance Package

Frequently Asked Questions on RoHS Enclosure Compliance

How can buyers visually distinguish Cr3+ from hexavalent Cr6+ galvanized steel?

Hexavalent chromium passivation typically produces an iridescent yellow, gold, or olive drab tint, whereas eco-friendly RoHS trivalent chromium (Cr3+) or Cr-free passivation produces a clear, silvery-blue or bright metallic appearance. Chemical spot testing is required for definitive legal verification.

Does electrostatic powder coating affect RoHS compliance?

Yes. Inexpensive industrial powders sometimes contain lead chromate pigments or toxic curing agents. MSTFAB exclusively uses TGIC-free polyester powder formulations certified by SGS to be 100% free of heavy metals and phthalates.