China is a leader in aluminum enclosure manufacturing, thanks to its robust industrial chain, modern processing centers, and highly competitive pricing.
From rugged industrial control enclosures to aesthetically pleasing consumer electronics enclosures, Chinese manufacturers support global original equipment manufacturers (OEMs) in a wide range of industries, including automation, telecommunications, renewable energy, drone equipment, and electric vehicle components.
This guide introduces the top ten aluminum enclosure manufacturers in China, encompassing manufacturers using various aluminum extrusion, sheet metal processing, and CNC machining methods.
Each company’s profile includes its strengths, product categories, production capacity, and recommended applications to help you choose the most suitable partner for your enclosure projects.
| Company | Main Enclosure Processing Method | Main Enclosure Types |
|---|---|---|
| Ya Ji Aluminum | Extrusion, CNC Machining | Extruded custom aluminum enclosure, CNC Housing, Power supply casing |
| KDMFAB (China) Co., Ltd. (KDM Fabrication) | Sheet Metal Fabrication, CNC Machining | Sheet metal cabinets, control panels, electrical enclosures |
| Guangdong Yonggu Technology Co., Ltd. | Extrusion, CNC Machining | Aluminum instrument enclosures, custom electronic housings |
| Lintai Enclosures Co., Ltd. | Sheet Metal Fabrication | Industrial cabinets, control boxes, telecom enclosures |
| Tuling Metal Co., Ltd. | Sheet Metal Fabrication, CNC Machining | Metal device housings, electronic cases |
| Wellste Aluminium Profile Enclosure (Zhenjiang) Co., Ltd. | Extrusion, CNC Machining | Extruded profile enclosures, heatsinks, electronics housings |
| Pailian Aluminium Profile Company Ltd. | Extrusion, CNC Machining | Architectural and industrial aluminum enclosures |
| Shenzhen OMK Electronics Co., Ltd. | Sheet Metal Fabrication, CNC Machining | Consumer electronics enclosures, device cases |
| Shenghai Aluminium | Extrusion, Sheet Metal Fabrication | Extruded enclosures, amplifier cases, control housings |
| Zhongwang Holdings (China Zhongwang) | Large-scale Extrusion, CNC Machining | Structural housings, industrial heavy-duty aluminum enclosures |
Ya Ji Aluminum
Location: Foshan, Guangdong, China
Website: yajialuminum.com
YaJi Aluminum was founded in 1994 in Nanhai District—one of China’s most advanced aluminum industrial clusters.
The company is a vertically-integrated extrusion + fabrication manufacturer specializing in custom aluminum enclosures, electronic housings, and industrial profile components.
The company provides a comprehensive engineering-to-manufacturing workflow, including CAD co-design, extrusion die development, CNC machining, welding, deep bending, punching, and multiple finishing options.
ISO 9001 quality management ensures consistent tolerance control and surface quality.
Main Enclosure Products:
- Extruded aluminum enclosures (industrial control, automation, LED, EV battery frames)
- Machined housings with IP-rated structures
- Architectural and industrial extrusion profiles
Capabilities & Strengths:
- Aluminum extrusion + CNC fabrication + finishing under one roof
- Strong design-for-manufacturing assistance & rapid prototyping
- Precise tolerance control for assembled enclosure structures
- Flexible MOQ to large-volume production
- ISO 9001 certified quality system
Recommended for: industrial devices, consumer electronics, automation systems requiring structural rigidity + lightweight performance.
Lintai Enclosures Co., Ltd.
Location: Huizhou, Guangdong, China
Website: lintai-enclosures.com
Lintai Enclosures is a professional electronic mechanical-structure supplier with over 14 years of production experience.
The company specializes in sheet metal boxes, profile enclosures and CNC-machined parts, serving industries such as communications, rail transit, power electronics, audio-video.
Main Enclosure Products:
- 19″ rack enclosures, sub-racks, instrumentation housings
- Aluminum extrusion boxes and custom sheet-metal enclosures
Capabilities & Strengths:
- Professional manufacturer of DIN-rail and control panel housings
- Injection molding + extrusion + modular enclosure design
- Ideal for automation & control electronics
- OEM customization for PCB mounting structures
Recommended for: telecom equipment, instrumentation, rack-mount systems requiring mixed extrusion + sheet-metal solutions.
Wellste Aluminium Co., Ltd.
Location: 3F L Zongze Road, Jingkou Area, Zhenjiang, Jiangsu, China
Website: wellste.com
Wellste is a specialist in extruded aluminium profile enclosures made from 6063-grade aluminium alloys.
It provides custom extrusion, CNC machining and finishing services in a vertically integrated manner.
Main Enclosure Products:
- Extruded aluminium profile enclosures, heatsink housings, custom instrument enclosures
- Industrial and outdoor aluminium enclosure boxes with heat-dissipation features
Capabilities & Capacity: - More than 20 years in aluminum extrusion industry
- In-house tooling, extrusion, CNC machining and finishing
- Produces more than 35,000 tons of aluminium products annually
Capabilities & Strengths:
- 1000+ standard enclosure profiles with fast customization
- Strong extrusion die development & rapid sampling
- Deep expertise in anodizing and hard-coat finishing
- Global export with stable delivery performance
Recommended for: high-precision extruded enclosures, devices with thermal management or custom profile requirements.
Pailian Aluminium Ltd.
Location: Foshan, Guangdong, China
Website: pailian-aluminium.com
Pailian has over 30 years of experience in aluminium extrusion and CNC processing. The company emphasizes design, manufacture and export of aluminium enclosures and profiles.
Main Enclosure Products:
- Extruded aluminium enclosures (6063-T5 CNC machined) for electronics
- Large-scale aluminium profile housings for industrial equipment
Capabilities & Capacity: - Advanced equipment, strong R&D team, strict QC system
- ISO 9001, ISO 14001 certified; exports to 70+ countries
Capabilities & Strengths:
- Large-size and complex aluminum extrusion capabilities
- Surface treatment: anodizing, powder coat, wood grain
- Supports architectural + industrial enclosure designs
- Known for competitive pricing and bulk output capacity
Recommended for: customers needing extruded-profile aluminium enclosures with CNC finishing for electronics or industrial equipment.
Shenzhen OMK Electronics Co., Ltd.
Location: Shenzhen, Guangdong, China
Website: chinaenclosure.com
OMK Electronics is a major supplier of both plastic and metallic (including aluminium) enclosures. They support custom mould design, extrusion, sheet-metal, CNC machining, coating and assembly.
Main Enclosure Products:
- Aluminium extrusion enclosures for electronics
- Plastic & metal housings for industrial control, telecommunications, medical devices
Capabilities & Capacity: - More than 1000 moulds; full spectrum of services from tooling to finished product
- OEM/ODM support for global clients
Capabilities & Strengths:
- Precision-machined enclosures for handheld devices & modules
- Custom waterproof (IP-rated) mechanical enclosure engineering
- In-house PCB & hardware integration services
- Small-batch rapid production for startups & OEMs
Recommended for: electronics and device manufacturers looking for full-service enclosure supplier with mixed materials (metal + plastic) capability.
Shenghai Aluminium
Location: China
Website: shenghai-alu.com
Shenghai Aluminium Enclosure is a manufacturer focused on extruded aluminium enclosures as part of its product offering—covering radiator housings, electronic enclosures, power supply equipment enclosures, etc.
Main Enclosure Products:
- Extruded aluminium enclosure boxes using high-quality aluminium profiles
- Custom lengths and cross-sections for electronics housings and equipment boxes
Capabilities & Strengths:
- More than 11 years of experience in aluminium enclosure manufacturing
- Technical team for die design, product design optimisation
- Custom finishing, colour matching, rapid manufacturing
Recommended for: general electronics enclosures, equipment housings requiring aluminium extruded enclosure box format.
Guangdong Yonggu Co., Ltd.
Location: Foshan, Guangdong, China
Website: yg-enclosure.com
Yonggu is a professional aluminum enclosure manufacturer operating from Foshan.
Their product range includes IP68 waterproof enclosures, 19″ rack mount chassis, instrument chassis, amplifier enclosures, sheet metal bending boxes, and CNC-machined parts. The company supports design, prototyping, and export.
Main Enclosure Products:
- Extruded split aluminum enclosures with custom lengths
- Sheet metal bending aluminum boxes
- Instrument housings and amplifier chassis
Capabilities & Strengths:
- Specializes in aluminum instrument enclosures for electronics
- Strong machining and assembly capabilities for panel + modules
- Well-established supply chain for accessories & hardware
- Wide catalog of ready-to-modify standard housings
Recommended for: communication equipment, security & monitoring devices, outdoor aluminum housings with high protection levels.
KDMFAB (China) Co., Ltd.
Location: China
Website: kdmfab.com
KDMFAB is a custom aluminum and sheet metal fabrication specialist offering aluminum enclosures in a variety of sizes and shapes across 3000/5000/6000 series aluminum grades.
Their manufacturing capabilities cover laser cutting, bending, welding, CNC machining, and assembly of enclosures from small junction boxes to large cabinets. ISO 9001:2015 certification confirms their quality management system.
Main Enclosure Products:
- Aluminum housings for electronics, battery enclosures, instrument enclosures
- Outdoor IP65/IP67 aluminum enclosures
Capabilities & Strengths:
- Full enclosure solutions: sheet metal, die casting, and machining
- Quick prototyping with fast delivery for global customers
- Strong enclosure design and material selection guidance
- Custom branding: laser marking, labeling, surface texturing
Tuling Metal Co., Ltd.
Location: Dongguan, Guangdong, China
Website: tulingmetal.com
Tuling Metal is a specialized provider of sheet metal fabrication and enclosure manufacturing in China.
The company serves electronics, telecom, automotive, medical and other industries through custom metal enclosure solutions.
Main Enclosure Products:
- Custom sheet-metal aluminum and steel enclosure boxes that safely house wires and cables and shield devices from electromagnetic interference.
- Outdoor metal enclosures rated for IP65/66/67/68 for protection from dust and water ingress.
- Aluminum electronics enclosures, bus-bar panels, ventilated metal boxes.
Capabilities & Strengths:
- Tooling & design team with CAD/CAM and 3D simulation for custom enclosures.
- Tight dimensional tolerances: ±0.1 mm to ±0.5 mm standard, ±0.05 mm to ±0.2 mm for critical features or mounting holes.
- Full-process manufacturing: stamping, bending, CNC machining, welding, surface finishing (anodizing, powder coating, e-coating, PVD, CVD).
- Quality management system certified: ISO 9001, ISO 14001, IATF 16949.
- Experience in IP and UL-rated enclosures, automation of inspection and packaging for consistent delivery.
Recommended For:
Companies looking for custom sheet-metal enclosures (especially aluminum) with high precision, environmental protection (IP rated), and full manufacturing support from tooling to finishing.
China Zhongwang Holdings Limited
Location: Liaoyang, Liaoning, China
Website: zhongwang.com
Zhongwang is one of the world’s largest aluminium extrusion product developers. It covers large-section extrusions and deep-processed aluminium parts used for housing and structural applications.
Main Enclosure Products:
- Large structural aluminium enclosures, heavy-duty industrial housings, transportation enclosures
Capabilities & Capacity: - Massive extrusion capacity; global scale production, integrated upstream & downstream operations
- Known for large-section, high-volume aluminium profiles
Capabilities & Strengths:
- One of China’s largest extrusion companies with aerospace setups
- Advanced alloys for high-strength and thermal-critical housings
- Deep processing: machining, welding, large structural assemblies
- Reliable supply chain for major industrial programs
Recommended for: large-scale industrial housings, structural aluminium enclosures for transport or infrastructure requiring heavy-duty profiles.
How to Select a Qualified Aluminum Extrusion and Machining Enclosure Supplier
Selecting an enclosure supplier is not only about price. Proper qualification ensures long-term consistency in structural integrity, surface quality, and assembly performance.
Understand the Product Manufacturing Type
Different enclosure structures require different manufacturing processes:
- Extruded aluminum enclosure (for long profiles, heat dissipation fins, standard form factors)
- Sheet metal enclosures (for large cabinets, customized folds and welded structures)
- Die-cast housings (complex 3D shapes and high sealing needs)
- Combined structures (extrusion + machining + sheet metal)
Clarifying the process helps reduce unnecessary cost and prevent structural compromises.
Verify Certification and Production Management Capability
A reliable manufacturer should provide:
- ISO 9001 quality management system
- RoHS, CE, REACH compliance for export
- In-house sample prototyping capability
- Stable production documentation system (PPAP, First Article Inspection reports)
These factors directly affect repeatability and delivery success.
Evaluate the Factory’s Integrated Capability
Key equipment and functional strengths include:
- Aluminum extrusion presses (600–3,500T as typical range)
- In-house die and mold manufacturing
- CNC machining (drilling, milling, tapping, slotting)
- Surface finishing: anodizing, powder coating, electrophoresis
- Assembly lines for enclosure integration
Vertical manufacturing reduces cost and lead time.
Consider Supply Chain, Lead Time, and Order Flexibility
Important parameters:
- Raw material control (primary aluminum ingots vs recycled scrap)
- Sufficient warehouse stock for fast delivery
- Support for small-batch prototype runs
- International logistics familiarity
Evaluate Total Cost, Not Only Unit Price
Cost components include:
- Extrusion die investment
- Machining time and scrap rate
- Surface treatment yield
- Rework frequency and defect ratio
- Packing and transportation protection
Optimizing these helps achieve both durability and value.
How to Conduct Quality Inspection for Aluminum Extrusion Enclosures
To ensure performance and product fit, inspection must cover material, machining accuracy, and surface durability.
Appearance and Surface Quality
Check for:
- Scratches, dents, extrusion ripple marks
- Anodizing color uniformity, coating thickness
- Powder coating adhesion and pinhole inspection
Dimensional Accuracy
Measurement focus:
- Profile cross-sectional dimensions
- Wall thickness deviation after extrusion or bending
- Flatness and parallelism
- Machining tolerance of cut-outs, ports, and interfaces
Material Composition and Mechanical Performance
Verification methods:
- Alloy designation (e.g., 6063-T5, 6061-T6, 5052 for sheet enclosures)
- Hardness tests (Webster or Rockwell)
- Conductivity or corrosion resistance checks
Assembly and Functional Fit
Inspection of:
- Tapped holes alignment
- PCB slot precision
- Panel assembly consistency
- Interchangeability between batches
Packaging and Transit Protection
Ensure:
- Anti-scratch film
- Moisture-proof wrapping
- Buffer materials for corners
Manufacturing Process of Aluminum Enclosures
A standard production workflow includes:
- Design and Engineering
CAD drawings → feasibility validation → die development - Extrusion Forming
Billet heating → high-pressure extrusion → cooling → stretching → artificial aging - Cutting and CNC Machining
Cutting to length → milling → drilling → tapping → chamfering - Surface Finishing
- Anodizing (clear, black, hard anodizing)
- Powder coating (various color and gloss levels)
- Screen printing or laser marking
- Assembly and Packaging
Module assembly → labeling → protective packaging → shipment
Each step must follow controlled parameters for consistency and strength reliability.
Applications of Aluminum Enclosures
Aluminum enclosures are widely applied in:
- Industrial control boxes and automation cabinets
- Outdoor electrical and power distribution enclosures
- 5G telecom base station and networking equipment housings
- Audio amplifiers and consumer electronics casings
- 19-inch rackmount equipment and system chassis
Lightweight, high EMI shielding performance, and corrosion resistance make aluminum the preferred material for demanding environments.
Summary
China remains one of the most promising sourcing destinations for aluminum enclosures because of:
- Large-scale and vertically-integrated manufacturing clusters
- Strong processing capabilities including extrusion + machining + finishing
- High automation and continuously improving quality standards
- Competitive pricing and flexible order handling for global customers
When selecting a supplier, the buyer should:
- Define enclosure structure and performance requirements
- Evaluate factory equipment and certifications
- Establish a rigorous inspection workflow
- Compare multiple quotations and request pre-production samples
A properly qualified supplier ensures product durability, reliability, and total cost optimization.
Frequently Asked Questions (FAQ)
1.What is the typical MOQ for custom aluminum extrusion enclosures in China?
MOQs often range from 300–1,000 pieces depending on profile complexity and surface finishing. For sheet metal enclosures, MOQs can be lower (50–100 pcs).
2.How long is the lead time for custom aluminum extrusion enclosures?
Tooling development generally takes 7–14 days. Mass production typically requires 20–30 days depending on machining complexity.
3.Can one supplier handle extrusion, CNC machining, and surface finishing?
Yes. Many qualified manufacturers provide one-stop solutions including design support, profile extrusion, machining, anodizing/powder coating, and assembly.
4.Which certifications should be required?
ISO 9001 is essential. For exports, RoHS, REACH, CE, IP rating tests, and salt spray testing may also be required based on application.
5.How to manage shipping and logistics?
Suppliers typically support EXW, FOB, or CIF terms and can assist with customs clearance documents, pallets, and protective packaging.
