EMI/RF Shielding Use Stainless Steel honeycomb core has higher physical strength than aluminum honeycomb, and are generally used in military applications that require high levels of EMI. Generally, the shieldin performance should be considered at the points at the following:

1. Shielding Performance

Different honeycomb core material offerings have different electrical performance, due to both inherent base material properties as well as the differing manufacturing processes used during honeycomb forming. Therefore, different EMI shielding performance may be realized. Shielding performance for different materials is ranked as brass, aluminum, steel and stainless steel. Plating can improve honeycomb shielding.

Specific attenuation requirements can be met through either plated or unplated alloys. Plating adds cost to the final product vent. Plating process for improving shielding is ranked as nickel, tin, tin-lead and zinc.

2. Airflow and Attenuation

Airflow and attenuation are inversely proportional. Infinitely large honeycomb cells result in infinitely small attenuation (and vice versa). Typically, as a design baseline, airflow performance requirements are calculated to meet thermal performance needs for the assembly that the vent is to be installed onto. Once airflow is determined, attenuation and other requirements can be evaluated. Standard cell sizes for honeycomb are 1/16", 1/8" and 1/4", with 1/8" being most common. Standard thicknesses are 1/4," 1/2" and 1," with 1/4" being most common.

Among of them, sport welded stainless steel honeycomb core is the mostly widely used. However, Pasia is able to supply customized product.

Technical Parameters (Material Description)of Stainless Steel honeycomb core
Frame: Steel SE1010
Stainless steel: SS304
Brass alloy: 260
Honeycomb: Steel QQ-S-698, Alloy C-1010
Stainless steel: SS304
Brass: QQ-B-613, alloy 260
Electromagnetic shielding gasket
Wire Mesh: Tin-plated copper-clad iron ASTM-B-520
Elastic material: neoprene sponge rubber
Surface layer description
Tin: tin according to MIL-T-10727, 1 type
Cadmium: Cadmium plating according to QQ-P-416 typeⅡ, level 2
Nickel: Electroless nickel plating according to MIL-C-26074AI
Grade: B degree

Applications: the stainless-steel laser welded honeycomb has the following:

EMI/RF Shielding

Operation tables for water jets

Structural core material for sandwich structure for aircraft, thrust reversers, exhaust nozzles,

Aircraft Engine Sealing

Turbine Sealing for power generation

Air, water and gas flow straighteners and filters