Manufacturing Processes

Kerns occupies a unique special process technology niche in aerospace. Our 9 in-house processes cover the full manufacturing spectrum — from vacuum brazing at 2300°F to in-house NDT at Levels 1, 2, and 3.

Process 01
Vacuum Brazing & Heat Treating

Four vacuum furnaces capable of achieving one micron or better vacuum levels. Qualified to AMS2750 specification for temperature uniformity surveys. Used for nickel, nickel-palladium, copper, and silver brazing alloys across the full range of aerospace super alloys.

4 Vacuum Furnaces 1 Micron or Better Vacuum Up to 2300°F (1260°C) AMS2750 Qualified
Process 02
Electron Beam Welding

Four 150KV electron beam welders with selected contour welding capability. EB welding delivers deep, narrow welds with minimal heat-affected zone — critical for maintaining the metallurgical properties of aerospace super alloys and life-critical components.

4 × 150KV EB Welders Contour Welding Capability Minimal Heat-Affected Zone
Electron beam welding at Kerns Manufacturing
Process 03
GTAW (TIG) Welding

Two semi-automatic GTAW (TIG) welding machines — 3-Axis, Rotary, Boom and Beam type — for consistent, repeatable weld quality on complex geometries. Eight manual welding booths staffed by certified aerospace welders with average 20+ years of experience.

2 Semi-Auto Machines 3-Axis / Rotary / Boom / Beam 8 Manual Welding Booths Certified Welders
GTAW TIG welding at Kerns Manufacturing
Process 04
Aluminum Dip Brazing

One salt bath dip brazing system with full pre and post-dip processing equipment. Aluminum dip brazing joins aluminum assemblies with exceptional strength and leak-proof seals — ideal for oil tanks, manifolds, and other fluid-carrying aerospace components.

Salt Bath System 24" (600mm) Capacity Pre & Post-Dip Equipment
Process 05
Electrical Discharge Machining (EDM)

Nine rotary and ram type EDM machines for machining complex forms in hardened super alloy materials where conventional cutting tools cannot reach. Augmented by a sophisticated supply chain for specialized EDM requirements beyond standard capabilities.

9 EDM Machines Rotary & Ram Type Super Alloy Capable
Process 06
Resistance Welding

Two Sciaky spot weld machines and one Sciaky seam weld machine. Resistance welding provides rapid, repeatable joining of sheet metal components with precise heat control. Used for thin-wall aerospace structures where distortion must be minimized.

2 Sciaky Spot Weld Machines 1 Sciaky Seam Weld Machine
Process 07
Air Flow Measurement

Certified air flow laboratory with full digital data acquisition capability. Critical for verifying the functional performance of nozzles, seals, inducers, diffusers, and other flow-critical components to OEM specifications before shipment.

Certified Laboratory 0.01 – 1.25 lbs/sec Range Digital Data Acquisition
Process 08
Radiographic Inspection (X-Ray)

Three 320KV X-Ray machines with all associated film developing and reading equipment maintained in-house. In-house Levels 2 and 3 certification means Kerns can conduct and certify its own radiographic inspections without third-party involvement — a significant quality control advantage.

3 × 320KV X-Ray Machines In-House Level 2 & 3 Full Developing Equipment
Process 09
Fluorescent Penetrant Inspection (FPI)

Complete FPI facility including acid tech capability for detecting surface and near-surface discontinuities. In-house Levels 1, 2, and 3 certification means Kerns maintains full control over the entire penetrant inspection process from preparation through final evaluation.

Complete FPI Facility Acid Tech Capability In-House Levels 1, 2 & 3

Super Alloy Expertise

Kerns works with the most demanding materials in aerospace manufacturing — materials that require deep expertise in handling, processing, and post-process machining.

Inconel 718 (Inco 718)

The workhorse of aerospace super alloys. Primary material for high-temperature structural components including frames, nozzles, and rotating assemblies.

Hastelloy X & B

Exceptional oxidation and high-temperature strength. Used extensively in honeycomb seals and heat-exposed stationary components.

Titanium (Ti-64)

High strength-to-weight ratio. Used in rotating air ducts and bearing supports where weight is critical. Requires special cleaning and handling protocols.

Rene 41 & Waspaloy

Nickel-based super alloys for extreme high-temperature applications. Used in seals and supports exposed to the highest temperature environments.

A286 & Stainless Steel

Iron-nickel super alloy (A286) and 410/321 stainless grades for turbine nozzles, stators, and structural assemblies.

Aluminum

Dip brazed aluminum for oil tanks, manifolds, separators, and other fluid-system components requiring pressure integrity and light weight.

Discuss Your
Process Requirements

Our engineering team can review your program specifications and identify the optimal process routing for your components.