Electronic Shield (SUS304 381×202)

Precision CNC Spun Stainless Steel Shield for Electronic Equipment & EMI Protection

1. Core Specifications (High-Reliability Electronic Shielding)

• Application Industry: Electronics / Power Electronics / Communication Systems / 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 (Structural-Grade 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:

• Superior structural rigidity vs aluminum shields
• Excellent corrosion resistance in humid or industrial environments
• Stable performance under thermal cycling and vibration

Geometry & Precision Control

• Dimensions: Ø381 mm × H202 mm
• Wall Thickness: 2.0 mm (Tolerance ≤ ±0.1 mm)

Dimensional Accuracy:

• Standard: GB/T 1804-2000 (m-grade)
• Roundness ≤ 0.2 mm
• Perpendicularity ≤ 0.15 mm/m

Assembly Performance:

• Ensures high-precision integration with electronic housings
• Maintains alignment stability for sensitive components

Surface Finish (EMI & Clean Environment Optimization)

• Surface Treatment: Progressive Mechanical Polishing

Surface Performance:

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

Functional Benefits:

• Improves electromagnetic wave reflection consistency
• Reduces contamination risks in precision electronic environments
• Enhances durability for long-term operation

2. CNC Metal Spinning Process (Stainless Steel Forming Expertise)

Core Forming Technology

• CNC Metal Spinning using CNC800 high-rigidity lathes
• Multi-pass incremental deformation for controlled material flow

Key Process Parameters

• Spindle Speed: 600–1000 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 Finishing)

• Rough: 1800 rpm (800#)
• Medium: 2400 rpm (1500#)
• Fine: 3000 rpm (2000#)
• Cycle Time: 6–10 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)
• Higher structural integrity vs aluminum spinning parts
• Improved deformation control for stainless steel forming
• Ideal for mid-size high-strength rotational enclosures (Ø200–600 mm)

3. Quality Assurance & Inspection (Electronics Industry Compliance)

Quality System

• ISO 9001:2015 Certified

Incoming Material Control

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

In-Process Quality Control

• Surface conformity ≥ 98%
• CMM dimensional inspection
• Full wall thickness inspection (±0.01 mm)
• Surface roughness & gloss verification
• 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 ID + full inspection report

4. Production Capacity & Lead Time

• Daily Output: 70 pcs
• Monthly Capacity: 2,100 pcs

Lead Time:

• Standard Orders: 4–7 working days
• Bulk Orders (≥100 pcs): 7–11 working days
• Urgent Orders: 2–4 working days

Packaging & Logistics

• Dust-proof film + EPE foam + reinforced carton + wooden pallet
• Standard: 40 pcs/pallet

Delivery:

• 2–5 working days (door-to-door)
• Supports direct OEM delivery

Customization Capability

• Diameter Range: Ø200–600 mm
• Height Range: 100–300 mm
• Material Options: SUS304 / SUS316L / AL1060

Engineering Inputs Required:

• EMI shielding performance requirements
• Thermal and environmental conditions
• Installation interface & assembly constraints

5. Application Scenarios

Primary Applications

• Communication base stations
• Power electronics modules
• Precision instrumentation
• Semiconductor manufacturing equipment

Core Functions

• Electromagnetic interference (EMI) shielding
• Anti-interference protection
• Mechanical protection for sensitive components
• Structural support under high-load conditions

Performance Parameters

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

6. Extended Applications

• New energy vehicle (EV) electronic control shielding
• Medical electronic equipment enclosures
• Rail transit onboard electronics
• Industrial automation control systems

Material Advantage (SUS304):

• High strength and rigidity
• Corrosion resistance in complex environments
• Stable EMI shielding structure for long-term operation

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 guidance

Service Commitment

• 24-hour response
• Technical 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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