Electronic Shield (SUS304 517×218)

Large-Diameter CNC Spun Stainless Steel Shield for Electronic Equipment & EMI Protection

1. Core Specifications (Large-Format Shielding Component)

• Application Industry: Electronics / Communication Infrastructure / Power Electronics / Semiconductor Equipment
• Component Type: EMI Shield / Stainless Steel Enclosure / Protective Housing
• Manufacturing Process: CNC Metal Spinning (Cold Rotary Forming) + Multi-Stage Precision Polishing

Material System (High-Strength Stainless Steel)

• Material Grade: SUS304 Austenitic Stainless Steel (GB/T 3280-2015)

Mechanical Properties:

• Yield Strength ≥ 205 MPa
• Tensile Strength ≥ 520 MPa
• Elongation ≥ 40%
• Density: 7.93 g/cm³

Engineering Advantages:

• Higher rigidity vs aluminum shields for large diameters
• Excellent corrosion resistance in industrial environments
• Stable mechanical performance under vibration and thermal cycling

Geometry & Dimensional Accuracy

• Overall Dimensions: Ø517 mm × H218 mm
• Wall Thickness: 2.0 mm (Tolerance ±0.1 mm)

Geometric Tolerances:

• Standard: GB/T 1804-2000 (m-class)
• Roundness ≤ 0.3 mm
• Perpendicularity ≤ 0.2 mm/m

Structural Performance:

• Maintains shape stability in large-diameter configurations
• Ensures precise alignment with electronic system assemblies

Surface Finish (Critical for EMI & Clean Assembly)

• Surface Treatment: Multi-stage Mechanical Polishing

Surface Quality:

• Surface Roughness: Ra ≤ 0.4 μm
• Gloss Level: ≥ 90 GU
• Surface Condition: Burr-free, scratch-free, oxide-free

Functional Benefits:

• Improves electromagnetic reflection consistency
• Reduces contamination risks in sensitive electronics
• Enhances long-term durability

2. CNC Metal Spinning Process (Large-Diameter Forming Control)

Core Forming Technology

• CNC Metal Spinning using CNC1250 large-capacity lathes
• Multi-pass incremental forming to control deformation and residual stress

Key Process Parameters

• Spindle Speed: 500–900 rpm
• Roller Feed Rate: 4–8 mm/s
• Single Pass Reduction: 0.4–0.6 mm
• Total Deformation: 1.9–2.1 mm

Polishing Process (3-Stage Precision Finishing)

• Rough: 1800 rpm (800# abrasive)
• Intermediate: 2400 rpm (1500# abrasive)
• Fine: 3000 rpm (2000# abrasive)
• Cycle Time: 7–11 min/unit

Full Manufacturing Workflow

Material Inspection → Alkaline Degreasing → Passivation → Neutralization → Flattening → CNC Spinning → High-Speed Deburring → Multi-stage Polishing → Ultrasonic Cleaning → Drying → Final Inspection

Process Advantages

• Seamless one-piece construction (no weld seams)
• Improved dimensional consistency for large diameters
• Controlled residual stress → reduced deformation risk
• Ideal for Ø300–800 mm stainless steel rotational enclosures

3. Quality Assurance & Inspection (Electronics-Grade QA System)

Quality System

• ISO 9001:2015 Certified

Incoming Material Inspection

• Spectrochemical analysis (Cr ≥ 18%, Ni ≥ 8%)
• Mechanical property testing
• Ultrasonic inspection (no inclusions or internal defects)

In-Process Quality Control

• Surface conformity ≥ 98%
• 3D CMM dimensional inspection
• Full wall thickness inspection (±0.01 mm)
• Surface roughness & gloss measurement
• Edge chamfer control (R ≥ 1.5 mm)

Final Inspection

• Standard: GB/T 2828.1-2012 (AQL 2.5)

Inspection Scope:

• Dimensional accuracy
• Surface integrity
• Corrosion resistance (Neutral Salt Spray ≥ 120 h)

Traceability:

• Unique product ID + full inspection report

4. Production Capacity & Lead Time (Scalable Manufacturing)

• Daily Output: 60 pcs
• Monthly Capacity: 1,800 pcs

Lead Time:

• Standard Orders: 5–8 working days
• Bulk Orders (≥100 pcs): 8–12 working days
• Urgent Orders: 3–5 working days

Packaging & Logistics

• Dust-proof film + EPE foam + reinforced carton + wooden pallet
• Standard: 30 pcs/pallet

Delivery:

• 2–6 working days door-to-door
• OEM factory direct delivery supported

Customization Capability

• Diameter Range: Ø300–800 mm
• Height Range: 100–300 mm
• Material Options: SUS304 / SUS316L / AL1060

Engineering Inputs Required:

• EMI shielding requirements (frequency / attenuation level)
• Thermal load and operating environment
• Assembly interface and mounting constraints

5. Application Scenarios

Primary Applications

• Large communication base stations
• Industrial power electronics modules
• Precision instrument enclosures
• Semiconductor manufacturing systems

Core Functions

• Electromagnetic interference (EMI) shielding
• Anti-interference protection
• Mechanical protection for sensitive components
• Structural support for large assemblies

Performance Parameters

• Shielding Effectiveness: ≥ 80 dB (10 MHz – 1 GHz)
• Operating Temperature: -20°C to 200°C
• Environment: Indoor / controlled industrial environments

6. Extended Applications

• Electric vehicle (EV) electronic control systems
• Medical electronics shielding housings
• Rail transit onboard communication equipment
• Industrial automation control systems

Material Advantage (SUS304):

• High strength for large-diameter stability
• Corrosion resistance in complex environments
• Reliable long-term EMI shielding structure

7. After-Sales & Engineering Support

Warranty

• 24 months

Coverage Includes:

• Dimensional deviation
• Material inconsistency
• Surface/polishing defects
• Corrosion or shielding performance failure

Technical Support

• Installation manuals & CAD drawings
• Material and performance reports
• Remote integration and commissioning support

Service Commitment

• 24-hour response
• Solution within 1–3 working days
• Dedicated quality follow-up

Lifecycle Services

• Re-polishing & refurbishment
• Dimensional correction
• Preventive maintenance programs

Get a Quote

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