Welding Services · Miami Gardens, Florida

Precision Welding Services

Fiber laser, TIG, MIG and resistance spot welding under one roof, to AWS D17.1 (Lockheed Martin approved), AWS D1.1, D1.2 and D9.1M, inside an AS9100 Rev D quality system. Brackets, enclosures, chassis, frames and structural weldments, prototype through production.

Overview

Welding Is In-House at MJM

Yes, MJM welds. Our welding department works next to our five Amada lasers, nine press brakes and machining center, so a weldment is cut, formed, fitted, welded, inspected and packed in the same 44,000 sq ft building. One purchase order, one quality system, one point of contact.

Every weld is made to a written, qualified Welding Procedure Specification (WPS) backed by a Procedure Qualification Record (PQR), by a welder holding a current performance qualification to the applicable AWS code. After welding we take care of powder coat, paint, anodize, plating and passivation, then assembly and final inspection, so you receive finished parts.

Processes

Four Welding Processes

Equipment

Welding Equipment

Equipment	Detail
IPG LightWELD fiber laser welders	9 handheld systems, up to 2 kW; 3 with Serra LightWIRE dual wire feed
Sciaky resistance spot welders	3 machines: 75, 100 and 200 kVA
TIG and MIG welding stations	Manual GTAW and semiautomatic GMAW, including spray-transfer aluminum
Cutting and forming feeding the weld cell	5 Amada lasers (Ventis 4 kW fiber, 3 Ensis 3 kW fiber, LC 2415 CO2) on 5 x 10 ft beds, 3 nitrogen generators, 9 Amada press brakes to 240 t / 14 ft, 3 Knuth plate rollers to 7 ft
Weld prep and finish	Grinding and blending, 3 Timesavers wet deburring machines, welding fixtures for repeatable fit-up
Inspection	Keyence XM-5000 portable CMM, Keyence LM-X optical measurement, Amada Fabri-Vision automated optical inspection

See the full list on our equipment page.

Certifications

Welding Codes and Qualifications

Copies of WPS, PQR and welder qualification records are available on request, along with weld maps for your part. All welding runs under our AS9100 Rev D and ISO 9001:2015 quality system. See all certifications.

Materials

Materials We Weld

• Carbon steel: cold rolled, hot rolled and galvanized sheet and plate
• Stainless steel: 300 series, including 304 and 316 / 316L
• Aluminum: 5052, 6061 and other 5xxx and 6xxx alloys
• Thickness: thin-gauge sheet through plate. Our in-house cutting capacity is mild steel to 1 in. and stainless and aluminum to 5/8 in.; send the drawing and we will confirm the weld procedure that covers it.

All raw material is US-sourced with mill certifications, with full traceability from receipt to shipment.

Quality

Weld Inspection and NDT

• Visual weld inspection on every weldment, to the acceptance criteria of the applicable AWS code and your drawing.
• Independent AWS Certified Welding Inspectors witness and certify our procedure and welder qualification tests.
• NDT: when your drawing or contract calls for radiographic, penetrant, magnetic particle or ultrasonic testing, it is performed by qualified independent NDT laboratories whose personnel are certified to NAS 410 / ASNT SNT-TC-1A, and their reports ship with your parts. MJM does not employ an in-house NDT Level III.
• Dimensional inspection of weldments by portable CMM and optical measurement, first article inspection reports per AS9102, and a Certificate of Conformance with every shipment.

Straight Talk

Where MJM Is Not the Right Fit

We are not a heavy structural steel shop: building beams and large field-erected structures belong with a structural fabricator. And we do not have an in-house NDT Level III; volumetric NDT goes to a qualified lab.

Where we win is precision: welded sheet metal and plate assemblies that also need laser cutting, forming, machining, hardware and a tight tolerance stack, from one prototype to production quantities, with the paperwork aerospace and defense customers expect.

FAQ

Welding Questions We Hear