Material Specifications & Compatibility
Spira’s EMI/RFI products are made using the finest materials and processes in compliance with AS9100 and ISO 9001. Material certifications are available upon request when your order is placed. Materials used are typically purchased to the following specifications unless otherwise noted or requested. See the Material Compatibility Chart.
View Material Specifications and Compatibility datasheet in pdf format for easy printing.
Material | Component/Process | Specification | Storage Temp | Operating Temperature |
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Spiral | Beryllium Copper | ASTM-B-194 | Ambient | -73° to 232° C, -100 to 450° F |
Stainless Steel | AMS-5906 | Ambient | < 704° C, < 1300° F | |
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Plating | Chemical Film | MIL-DTL-5541 Class 3 | Ambient | < 66° C, < 150° F |
Chemical Film (RoHS) | MIL-DTL-5541 Class 3, Color Clear | Ambient | < 66° C, < 150° F | |
Gold | MIL-DTL-45204, Type II, Grade C, Class 1 | Ambient | < 274° C, < 525° F | |
Pure Tin (RoHS) | ASTM-B-545 | Ambient | < 150° C, < 302° F | |
Tin-Lead | 90% Tin, 10% Lead per AMS-P-81728 | Ambient | < 150° C, < 302° F | |
Sulfamate Nickel | AMS-QQ-N-290B, Class 2 | Ambient | < 649° C, < 1200° F | |
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Rubber | EPDM (Solid) | ASTM D2000 M3 BA | Ambient | -80° to 275° C, -112° to 527° F |
Fluorosilicone (Solid) | MIL-DTL-25988, Type ll, Class 1 | Ambient | -55° to 225° C, -67° to 437° F |
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Fluorosilicone (Sponge) | AMS-3323 | Ambient | -62° to 204° C, -80° to 400° F |
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Neoprene (Sponge) | ASTM-D-6576, Type II, Grade A, Condition-Medium | Ambient | -54° to 121° C, -65° to 250° F |
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PVC Cord | Commercial Grade | Ambient | -30° to 160° C, -22° to 320° F |
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Silicone (Solid) | A-A-59588, Class 2B. See product spec sheet for grade. | Ambient | -65° to 225° C, -85° to 437° F |
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Silicone (Sponge) | Red per ASTM-D-6576, Type II, Grade C, Condition-Medium | Ambient | -38° to 204° C, -100° to 400° F |
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Thermal Plastic Rubber | ASTM-D-2000 CA710, C32, EA14, F19 | Ambient | -80° to 275° C, -112° to 527° F |
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Adhesive | Epoxy | 2216 B/A per ASTM-D-2000 | Ambient | -80° to 275° C, -112° to 527° F |
Fluorosilicone (Enduro-Shield core) | Dow Corning 730 RTV | ≤ 32° C | -57° to 260° C, -71° to 500° F |
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Fluorosilicone (Red) | Dow Corning Q4-2817 Sealant | ≤ 32° C | -57° to 260° C, -71° to 500° F |
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Neoprene (Contact Cement) | MMM-A-1617, TYPE II | -16° to 27° C | -67° to 177° C, -89° to 351° F |
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PSA (Neoprene) | Rubber/Acrylic adhesive | Ambient | -34° to 65° C, -30° to 150° F |
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PSA (Silicone & Fluorosilicone) | Acrylic Adhesive | 24° C | -40° to 121° C, -40° to 250° F |
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Silicone (Enduro-Shield standard core) | Dow Corning 732 RTV Per MIL-A-46106, Group I, Type I | ≤ 32° C | -60° to 177° C, -76° to 351° F |
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Silicone (Enduro-Shield Stainless Steel gaskets) | Dow Corning 737 | ≤ 32° C | -65° to 177° C, -85° to 351° F |
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Silicone (Non-acetic acid base) | Dow Corning 3145 RTV Per MIL-A-46146, Group II, Type I | ≤ 32° C | -50° to 200° C, -58° to 392° F |
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Silicone (White, non-outgassing) | Dow Corning 61125 Per ASTM E595 | ≤ 32° C | -60° to 177° C, -76° to 351° F |
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Other | Connector-Seal Metal Frame/Core | 6061-T6 Aluminum per AMS-4027 (SSCG) | Ambient | < 343° C, < 650° F |
Stainless Steel per AMS-5516M (Core) | Ambient | < 704° C, < 1300° F | ||
Dovetail Groove Cutter | Tungsten Carbide | Ambient | N/A | |
AirVent Filter Extrusion | 6061-T4 Aluminum per AMS-QQ-A-200/8 | Ambient | < 343° C, < 650° F | |
Fan Filter Frame | 6061-T4 Aluminum per AMS-4026 | Ambient | < 343° C, < 650° F | |
Honeycomb Panel | Aluminum per AMS-C-7438 | Ambient | < 204° C, < 400° F | |
Brass per ASTM-B-36/B 36M. Foil soldered together per ASTM-B-32 | Ambient | < 230° C, < 446° F | ||
Threaded Insert | Cadmium plated Alum. AMS-QQ-P-416 | Ambient | N/A |
The shielding effectiveness of EMI gasketed joints can be significantly affected by corrosion. The corrosion of concern is a galvanic cell between the gasket and the joint surface in the presence of moisture or salt-fog atmospheres. The chart below lists six common materials used in EMI gaskets along with their degree of compatibility with common joint surface material/plating combinations. (The chart was extracted from ARP-1481, published by the Society of Automotive Engineers). The legend describes the degree of compatibility and/or requirements for obtaining a corrosion free joint. The term “requires sealing” means that the gasketed joint surfaces must be protected in some way from the moisture and/or salt-fog atmospheres.
*Standard gasket materials used by Spira.
Legend:
A - Compatible
B - Requires sealing only if exposed to salt atmosphere or high humidity. Edge plating may be satisfactory
C - Requires sealing if exposed to humid environment
D - Compatible in environment of controlled temperature and humidity only
E - Requires sealing regardless of exposure
X - Not usable