Dip Brazing of an Aluminum Fin Field for the Military Industry
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The fin field stock shown here was designed for use in a military application to cool electronic components. Composed of 0.032” thick, 6061-T6 aluminum it required several processes to manufacture. The fin components were CNC milled before being dip brazed per AWS C3.7 Class C. Each finished part measured 2.3” in length, 1” in width, 0.5” in height, and met tolerances of ±0.001”. At Ridge Engineering we’re ISO 9001:2008 certified and take quality seriously; all parts are subject to stringent quality control measures.

After fabrication the fin was heat treated per AMS 2770, followed by the application of a chromate conversion coating per MIL-DTL-5541, with a surface roughness of 32 RMS. We currently manufacture 30,000 of these parts per year delivering 3,000 per month. To learn more about this project, see the table below or contact us directly.

Dip Brazing of an Aluminum Fin Field – Project Details

Product Description

This fin field stock is used to cool electronics on a military application.

Capabilities Applied/Processes

CNC Milling
Dip Brazing

Chromate Conversion Coating
Heat Treating

Overall Part Dimensions

Length: 2.3″
Width: 1″
Height: 0.5″
Gauge: 20

Tightest Tolerances


Material Used

6061-T6 Aluminum
Thickness: 0.032″

Material Finish

Chromate per MIL-DTL-5541
Heat Treated per AMS 2770
Color: Gold
Surface Roughness: 32 RMS

In process testing/inspection performed

Dimensional Inspection, Visual Inspection

Industry for Use




Delivery/Turnaround Time

3,500 per month

Standards Met

Customer Specifications, 2D CAD Drawing
ISO 9001
Dip Brazing per AWS C3.7 Class C
Heat Treating per AMS 2770
Chromate per MIL-DTL-5541

Product Name

Fin Field

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