Metal Shell/Body: Temperature Range -40°C to 900°C

Component Specifications

Definition

The metal shell/body in an igniter serves as the primary structural enclosure that houses internal ignition elements such as electrodes, insulators, and wiring. It functions to protect sensitive components from environmental factors (moisture, dust, mechanical impact), dissipate heat generated during spark generation, provide electrical grounding pathways, and maintain precise alignment of internal parts for consistent spark performance. Typically manufactured through precision stamping, casting, or machining processes with strict dimensional tolerances.

Working Principle

The metal shell acts as both a protective barrier and functional component by: 1) Containing high-voltage electrical discharge within designated spark gaps, 2) Conducting heat away from ignition points to prevent overheating, 3) Providing electromagnetic shielding to prevent interference with adjacent electronics, 4) Maintaining mechanical stability during vibration and thermal cycling through rigid construction.

Materials

Common materials include: Stainless steel (AISI 304/316 for corrosion resistance), Aluminum alloys (6061-T6 for lightweight applications), Cold-rolled steel with zinc plating (for cost-effective solutions), Nickel alloys (for high-temperature environments). Material thickness typically ranges 0.8-2.0mm depending on application requirements.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Length	15-60mm
Diameter	8-25mm
IP Rating	IP67 minimum
Thread Type	M10x1.0 to M18x1.5
Voltage Rating	Up to 40kV
Wall Thickness	0.8-2.0mm
Temperature Range	-40°C to 900°C

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Standards

ISO 8854, DIN 72552, SAE J548, IEC 60079

Parent Products

This component is used in the following industrial products

Igniter

A device that initiates combustion in a gas turbine combustion chamber by generating a high-energy spark or flame.

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Engineering Analysis

Risks & Mitigation

Corrosion in humid environments
Thermal expansion mismatch
Electromagnetic interference
Mechanical fatigue from vibration
Improper grounding leading to electrical hazards

FMEA Triads

Trigger: Material corrosion due to environmental exposure
Failure: Reduced structural integrity leading to component failure
Mitigation: Use corrosion-resistant materials (stainless steel/nickel plating) and protective coatings

Trigger: Thermal stress from repeated heating/cooling cycles
Failure: Cracking or deformation affecting spark gap alignment
Mitigation: Implement thermal expansion compensation designs and use materials with matched coefficients

Trigger: Vibration-induced mechanical fatigue
Failure: Loosening of internal components or shell cracking
Mitigation: Add vibration-damping features and conduct rigorous vibration testing during design validation

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

±0.05mm for critical dimensions, ±0.1° for angular alignment

Test Method

Pressure testing (5 bar minimum), High-voltage dielectric testing (40kV for 60 seconds), Thermal cycling (-40°C to 300°C for 100 cycles), Salt spray testing (500 hours per ASTM B117)

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

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Manufacturers of Metal Shell/Body

Manufacturer profiles associated with Metal Shell/Body.

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Compiled and source-reviewed by the CNFX editorial team. Each manufacturer above links to the page on that company's own website where the product is listed, with the date we checked it. How we source and review

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Frequently Asked Questions

What is the primary function of a metal shell in igniters?

The metal shell provides structural protection, heat dissipation, electrical insulation, and maintains precise component alignment for consistent spark generation.

Can different metal materials be used for igniter shells?

Yes, material selection depends on application requirements: stainless steel for corrosion resistance, aluminum for lightweight needs, nickel alloys for extreme temperatures.

How does shell design affect igniter performance?

Shell dimensions, wall thickness, and material conductivity directly impact heat dissipation, spark consistency, electromagnetic interference shielding, and durability.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

Preliminary Technical Classification

This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

Metal Shell/Body