Hartzell Aerospace Welding has unmatched expertise in exhaust systems and custom metal fabrication, HAW delivers quality, performance, and support you can count on.
Hartzell Aerospace Welding (HAW) brings together the capabilities of Aerospace Welding (AWI), Aerospace Manufacturing (AMI), and Acorn Welding to serve general aviation, commercial, and specialized aircraft markets.
As the industry leader in certified aircraft exhaust systems and precision metal fabrication, HAW delivers products engineered for reliability and built to perform. Their expertise extends beyond standard exhaust to include custom fabrication, complex assemblies, and specialized welding solutions that meet the highest FAA and industry standards.
With decades of proven experience, Hartzell Aerospace Welding provides the same level of quality and stability in its manufacturing as pilots demand from their aircraft in flight. Backed by the Hartzell Aviation family, HAW ensures every product and service is supported for the long haul.
To learn more, visit their website here.
For exhaust questions and support call: Acorn Welding: 1 (888) 388-8803 or AWI: (651) 379-9888
Shop the HAW brands at the links below.
Explore our Exhaust Systems and accessories for improved efficiency, reduced noise, and enhanced overall performance of your aircraft engine.
Certified- TIG Welding
Over 60 welding stations between our 2 locations In Eagan, Minnesota and Edmonton, Alberta.
- CERTIFIED WELDER QUALIFICATION PROGRAM
- Welders are qualified for Sheet Groove, Tube Groove, Sheet Filet and Tube Fillet Welds in multiple positions to ensure compliance with AWS D17.1:2017 during all stages of welding. Our welders are qualified in a wide range of thicknesses, materials, and positions to meet the needs for most clients. In addition to AWS D17.1:2017 Qualification, our welders are qualified to customer weld process specifications as required.
- Stainless Steel – D17.1
- Aluminum – D17.1
- Inconel – D17.1 4130
- 4130 / Chromoly – D17.1
- DASW-DRAWN ARC STUD WELDING TO AWS D17.2:2019
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- Computer assisted weld schedules to ensure repeatable results
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- Can be used in combination with RSW process
- RSW-RESISTANCE SPOT WELDING TO AWS D17.2:2019
- Computer assisted weld schedules to ensure repeatable results
- Weld schedule creation and certification for each combination of material type/thickness
- Capable of operating at 3000PSI tip pressure
- Capable of producing Class A seam welds with Class B production criteria
- Multiple electrode styles available to hard to reach and offset areas
- RSEW-RESISTANCE SEAM WELDING TO AWS D17.2:2019
- Computer assisted weld schedules to ensure repeatable results
- Weld schedule creation and certification for each combination of material type/thickness
- Capable of operating at 3000PSI tip pressure
- Capable of producing Class A seam welds with Class B production criteria
- Capable of welding parts up to 36” length in a single weld
- Capable of welding parts up to 36” Ø
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Metal Fabrication
- Multiple electric and hydraulic tube benders capable of up to 5″Ø
- Amada CNC Press Brake, 8′ x 8 axis, 88 Ton capacity
- Laser Cutting – Mazak 6 Axis, X-8′, Y-4′, Z-14″, 2500 Watt, ¼” SS and Aluminum sheet, 6″ Ø Tubing
- Power Sheet Metal Roller
- Hydraulic shears
- Punch Pressing
- Metal spinning lathe with circle cutter
- Tube end forming capabilities
- Aviation Riveting and Hardware
- Installation Hardware Installation and Assembly
- Hardness testing
- Horizontal and Vertical Band Saws
- Plasma Cutters – hand held
- Media Blasting Cabinets
- Vibratory De-burring
- FORMING DEPARTMENT
- Various Hydraulic Presses
- Stamping and Trim Presses
- Deep Draw 200 Ton Hydraulic press
- Layout, Pattern and Trim shop
COATING
- 16′ X 24′, heated paint booth
Precision Machining
- Haas SL20 CNC Turning Center with a cutting capacity of 8″ Diam. X 24″ between Centers
- Haas Super VF4 CNC Machining Center with full 3 axis (wired for full 4 axis) X 50″ x Y 20″ x Z 25″
- Haas Super VF4 CNC Machining Center with full 4 axis (wired for full 5 axis) X 50″ x Y 20″ x Z 25″
- Haas VF2SS 3 axis vertical mill, Table travel X 30″ ,Y 16″ , Z 20″, 12,000 RPM Spindle
- Computer manual lathes w/ DRO
- Computer manual mills w/ DRO
PART MARKING/PACKAGING
- Pin Marking Machine
- VideoJet 1520
- Laser Part Marking
- Identification Marking to AS478
- ATA300 Packaging Available by request
- Bagging, Heat Sealing, and Kit Packaging
- Barcode and QR Identification capabilities
Quality Assurance
Our Certified in-house lab allows us to prepare, etch, and examine welds to the AWS D17.1:2017 and AWS D17.2:2019 Standards. Having this capability in-house not only allows us to reduce the lead time on weld schedule validation but allows us to fine tune the welding process to reduce the number of weld rejects.
Our Metallurgical Lab utilizes EDM cutting equipment to accurately cut and prepare weld samples for metallurgical examination. A certified etching process is used to enhance the weld features to ensure sufficient weld penetration is present. A Calibrated Computer assisted digital microscope is used to measure and record the results. Results are validated by 3rd parties where required.
- CMM Romer Arms
- PC-DMIS CMM Inspection Software
- Computerized Imagery inspection
- 9′, 7 axis
- 6′, 6 axis
- Profilometer Ultra Sound Thickness gauge
- Video Borescopes
- HARDNESS TESTING TO ASTM E18-19
- Computer recorded Rockwell 574 Hardness tester
- For Production and Material Inspection
- Various QA measuring tools and gauges
- LIQUID PENETRANT INSPECTION TO ASTM E1417-16
- In house capability with Level II staff on site
- – All procedures validated by 3rd party Level III
- – Compatible with most customer specific processes
- MAGNETIC PARTICLE INSPECTION TO ASTM E1444-16
- In house capability with Level II staff on site
- All procedures validated by 3rd party Level III
- Compatible with most customer specific processes
- X-RAY FLUORESCENCE(XRF) INSPECTION
- Positive material Identification
- Material Composition inspection
- Process Verification inspection
Aircraft Oil Filters
