A metal enclosure is a fabricated housing — manufactured from sheet metal, extruded aluminium, or machined plate — that mechanically protects electrical, electronic, or electromechanical equipment from environmental hazards including dust, moisture, mechanical impact, electromagnetic interference (EMI), and unauthorised access. According to IEC 60529:2013 (Degrees of protection provided by enclosures — IP Code), an enclosure's protective performance is quantified by its Ingress Protection (IP) rating, expressed as IPXY where X denotes solid-particle protection (0–6) and Y denotes liquid ingress protection (0–9K).
Sheet-metal enclosures are the dominant form factor in industrial and commercial electronics because thin-gauge metal (processed via laser cutting, CNC bending, and robotic welding) offers an outstanding strength-to-weight ratio, predictable electromagnetic shielding effectiveness (SE), and virtually unlimited geometric freedom at moderate cost. The global metal enclosure market was valued at approximately USD 3.4 billion in 2023 and is projected to expand at a CAGR of 5.8 % through 2030, driven by industrial automation, data centre buildout, and EV charging infrastructure (Grand View Research, "Electrical Enclosures Market Report," 2024).
Engineers specify metal enclosure IP ratings at the design stage. The table below — derived from IEC 60529:2013, Table 1 and Table 2 — maps each protection level to its test requirement and the most common application contexts fulfilled by Jiafeng's sheet metal manufacturing capabilities.
Source: IEC 60529:2013 (Ed. 2.2), Tables 1–2; NEMA 250-2020, Table 1. IP ratings are achieved through enclosure geometry, gasket selection, and finish quality — all controlled in Jiafeng's vertically integrated production line.
Material selection is the most consequential decision in metal enclosure design. It drives weight, corrosion resistance, electromagnetic shielding effectiveness (SE), machinability, and lifecycle cost. The following table compares the materials stocked and processed by Jiafeng's precision machining and sheet metal divisions, referencing tensile data from ASM International Handbook, Vol. 2 (Non-Ferrous Alloys) and Vol. 1 (Iron & Steel).
EMI SE values are indicative for 1.0 mm sheet at 1 MHz per IEEE Std 299-2006 (Standard Method for Measuring the Effectiveness of Electromagnetic Shielding Enclosures). Actual SE depends on aperture size, gasket type, and seam treatment. Tensile ranges from ASM Handbook Vols. 1 & 2.
Jiafeng manufactures custom metal enclosures through an entirely in-house workflow — from raw coil to finished, assembled, and tested product. Each stage is ISO 9001-controlled with documented first-article inspection (FAI). The complete process integrates our sheet metal manufacturing, precision machining, and mechatronics integration divisions.
Customer 2D/3D drawings reviewed against Design for Manufacturability (DFM) principles. Bend radii, minimum flange lengths, and hole-to-edge distances validated per SME Sheet Metal Handbook (Kalpakjian & Schmid) guidelines.
Fibre laser cuts flat blanks from coil or sheet stock with a kerf width of 0.1–0.3 mm and a dimensional accuracy of ±0.05 mm. Heat-affected zones (HAZ) are minimised via adaptive pierce control, preserving material hardness at cut edges.
Salvagnini automatic benders fold complex box geometries in one setup; CNC press brakes (35–250 T) handle custom profiles. Springback is compensated automatically using closed-loop angle measurement, achieving ±0.2° bend accuracy.
NCT punch presses produce ventilation louvres, cable knock-outs, and mounting arrays. PEM self-clinching fasteners (M2.5–M10) are installed by press force, providing captive threads without welding — critical for cosmetic enclosure faces.
Laser welding (3 kW), CO₂ MIG, TIG, and stud-welding robots join enclosure panels with full penetration welds. Seam grinding and flat-brushing restore cosmetic surface quality post-weld — essential for IP65+ rated enclosures requiring continuous seal surfaces.
Zinc electroplating (96–128 h salt-spray per ISO 9227), powder coating in any RAL colour (500–1,000 h), ceramic conversion coating, passivation, anodising, or laser marking — all performed in-house on dedicated, automated production lines.
For finished metal enclosures requiring internal fitment, our Level-5 assembly lines integrate PCBs, wiring harnesses, DIN-rail components, sensors, and HMI panels — delivering a fully assembled, tested system rather than a bare enclosure shell.
100 % outgoing inspection using CMM [E=(1.9+3L/1000) µm], CCD vision system (±50 µm), X-ray element analyser, and tensile tester. Dimensional reports, material certs, and RoHS compliance documentation ship with every order.
The term metal enclosure encompasses a wide family of products differentiated by mounting style, environmental rating, and end-use function. All types listed below are within Jiafeng's standard production capability. Custom variants are supported through our OEM/ODM design-to-production service.
Electromagnetic compatibility (EMC) is a primary engineering driver for metal enclosure design in electronics and power applications. According to Ott, H.W., "Electromagnetic Compatibility Engineering," Wiley, 2009, the three pillars of enclosure-level EMC are: (1) aperture control, (2) seam treatment, and (3) material selection. The table below summarises actionable design parameters that Jiafeng's engineers address at the DFM review stage.
References: Ott (2009), IEC 61000-5-7:2001, IEEE Std 299-2006, CISPR 16-1-4:2019.
Jiafeng accepts orders from a single prototype piece. Because our sheet metal manufacturing process relies on CNC laser cutting and bending rather than hard tooling, one-off and small-batch metal enclosures are cost-effective from day one. Volume pricing applies at 500+ pieces and improves further beyond 5,000 pieces. Request a quote with your quantity for a firm price.
For most outdoor installations, IP65 (dust-tight, low-pressure water jets) is the minimum recommended rating per IEC 60529. Applications exposed to high-pressure cleaning (telecom base stations, food-processing lines) require IP66. Submerged or flood-prone environments specify IP67 or IP68. Jiafeng achieves these ratings through weld-sealed seams, precision-machined gasket grooves (±0.1 mm), and 96–128 h salt-spray-tested zinc plating — validated per ISO 9227.
Steel (SPCC, SECC, 304 SS) is preferred where cost efficiency, EMI shielding, or structural rigidity is paramount — it is approximately 2.9× denser than aluminium but offers 60–110 dB SE at 1 MHz. Aluminium alloys (5052, 6061) are chosen when weight reduction, natural corrosion resistance, anodised aesthetics, or thermal management are critical. Our precision machining team can produce hybrid enclosures — for example, a steel chassis with an aluminium front panel — to satisfy competing requirements simultaneously.
Yes. Our electromechanical integration division operates Level-5 assembly lines capable of populating a finished metal enclosure with DIN-rail components, wiring harnesses, PCBs, PLCs, HMI panels, sensors, and power supplies — and delivering a fully tested, CE/RoHS-certified system. This vertically integrated approach eliminates the supplier boundary between enclosure maker and system assembler, reducing lead time and accountability gaps.
In-house options include zinc electroplating (blue-white, 96–128 h salt-spray per ISO 9227), powder coating in any RAL colour (500–1,000 h after phosphating), chrome-free ceramic conversion coating, passivation (nitric or citric acid), weld-seam polishing to No. 4 hairline or No. 8 mirror finish, silk-screen and pad printing, and 50 W fibre laser marking. Anodising and hard-chrome are available through vetted partners. See our full surface treatment capabilities.
