Stainless Steel Fabrication · Miami Gardens, Florida

Stainless Steel Fabrication

304, 316 and other stainless grades cut, formed, welded and finished by one shop. We laser cut stainless to 5/8 in. with nitrogen for clean, oxide-free edges, weld it with fiber laser and TIG, and deliver parts brushed, passivated or coated.

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304 · 316 · 321 · 410 · 430|Laser Cut to 5/8 in.|Nitrogen Assist|TIG and Fiber Laser Welded|AS9100 Rev D

Overview

A Stainless Steel Fabricator for Precision Work

Stainless is unforgiving. It work hardens, it moves when it is welded, and every scratch and heat tint shows. Our stainless steel fabrication is set up around those facts: fiber lasers cutting with high-purity nitrogen, press brakes with offline programming, low heat input fiber laser welding, and wet deburring that leaves a consistent edge.

Everything runs under our AS9100 Rev D and ISO 9001:2015 quality system with mill certifications and lot traceability on the material. For cutting detail by grade and thickness see stainless steel laser cutting.

Grades

Stainless Grades We Fabricate

Grade	Where It Is Used
304 / 304L	The general-purpose grade: enclosures, panels, brackets, food and medical equipment.
316 / 316L	Added corrosion resistance for marine, coastal, chemical and washdown service.
321	Elevated temperature and aerospace applications.
410 and 430	Martensitic and ferritic grades for wear parts, magnetic applications and cost-sensitive trim.

Sheet from thin gauge through 5/8 in. plate. Tell us the grade, thickness and finish on the drawing and we will source certified material.

Processes

How We Fabricate Stainless

Laser Cutting

Five amada lasers (one ventis 4 kw fiber, three ensis 3 kw fiber and one co2) on 5 x 10 ft tables, fed by three on-site nitrogen generators at up to 99.9999% purity. Nitrogen cut edges are bright and ready to weld. Tolerance ±0.005 in.

Punching and Forming

Amada AE 2610NT turret punch for perforations and louvers; nine Amada press brakes to 240 tons and 14 ft; three plate rollers to 7 ft for cylinders and curves.

Welding

Nine IPG fiber laser welders for low-distortion seams on thin stainless, plus TIG with qualified AWS D9.1M procedures for 300 series (ER308L) and AWS D17.1 for aerospace work. Welding services.

Deburring and Finish

Three Timesavers wet deburring machines, weld blending, brushed grain, sand blasting, passivation, powder coat and laser marking.

Machining and Hardware

Tapped holes, countersinks and milled features on the Mazak; PEM hardware for stainless installed on Haeger presses. Hardware insertion.

Inspection

Optical and CMM inspection, first article reports, material certs and a certificate of conformance with each shipment.

What We Build

Stainless Steel Parts and Assemblies

Enclosures: Type 4X style washdown and outdoor boxes, covers and doors. See electrical enclosure fabrication.
Medical and laboratory: housings, trays, carts and panels. See medical device fabrication.
Marine and architectural: 316 brackets, trim, panels and rolled parts. See marine and architectural.
Industrial and OEM: guards, chutes, frames, weldments and perforated panels.
Aerospace and defense: brackets and weldments with full documentation.

Design Notes

Design Tips for Stainless Parts

Call out the finish and grain direction on the drawing. A brushed face needs protection through every step, and that changes how we cut and handle the part.
Allow for springback. Stainless springs back more than mild steel; keep inside bend radii at or above material thickness.
Mind the heat. Long welds on thin stainless pull. Laser welding, stitch welds and formed corners reduce distortion and grinding.
Specify passivation when corrosion resistance matters after welding or machining.

More in the sheet metal DFM guide and the bend deduction calculators.

Straight Talk

Where MJM Is Not the Right Fit

We are not a sanitary tube and pipe shop, and stainless plate thicker than 5/8 in. is beyond our lasers. For those, a process piping fabricator or a plate burner is the better call.

We are the right shop for stainless sheet and plate parts that must be accurate, clean and repeatable, with welding and finishing included.

FAQ

Stainless Steel Fabrication Questions

What grades of stainless steel does MJM fabricate?

MJM fabricates 304, 304L, 316, 316L, 321, 410 and 430 stainless steel sheet and plate, with mill certifications and lot traceability.

How thick can MJM laser cut stainless steel?

Up to 5/8 in. (0.625 in.) on Amada fiber lasers using nitrogen assist gas for oxide-free edges, with a typical tolerance of ±0.005 in.

Does MJM weld stainless steel?

Yes. MJM welds stainless with nine IPG fiber laser welders and manual TIG, using qualified procedures to AWS D9.1M and AWS D17.1, plus resistance spot welding for sheet assemblies.

Can MJM passivate and finish stainless steel parts?

Yes. Parts are delivered deburred, brushed, blasted, passivated or powder coated as the drawing requires, with laser marking available.

What is the difference between 304 and 316 stainless steel?

304 is the general-purpose grade. 316 contains molybdenum, which gives better resistance to chlorides, so it is preferred for marine, coastal and chemical environments. 316 costs more.

Is there a minimum order for stainless steel fabrication?

No. MJM builds single prototypes through production quantities and returns quotes in 24 to 48 hours.

Stainless Steel Laser Cutting: grades, thickness and edge quality.
Welding Services: fiber laser, TIG, MIG and spot welding to AWS D17.1, D1.1, D1.2 and D9.1M.
Electrical Enclosure Fabrication: NEMA-type boxes, cabinets and panels built to print.
Metal Finishing and Powder Coating: powder coat, anodize, chem film, passivation and plating on one PO.
Aluminum Fabrication: 5052 and 6061 cut, formed, welded and finished.
Custom Metal Fabrication: the full shop under one roof.
Sheet Metal Materials: every metal and gauge we process.

Send Us Your Stainless Drawings

STEP files and PDF drawings to sales@mjmmfg.com or (305) 620-2020. Quotes in 24 to 48 hours.

Request a Quote Contact Us

Ronald Travieso

Working with MJM Manufacturing has been one of the best vendor experiences I've had. The parts matched my samples perfectly, and even the packing was done with real care — clean, organized, and professional. Of all the vendors I've worked with, they're by far the most organized and quality-focused. Great communication from start to finish. Highly recommend them for custom fabrication work.

Robert Cooler

MJM is wonderful to deal with. They have worked diligently and have produced my projects thus far to the highest standards.

Israel Schechter

I have been ordering parts from MJM Manufacturing for many years, and they have consistently exceeded my expectations. Their quality, professionalism, and attention to detail are outstanding. Every order is handled efficiently, delivered on time, and manufactured to the highest standards. The team at MJM is knowledgeable, responsive, and always willing to go the extra mile to ensure customer satisfaction. It is rare to find a company that maintains such a high level of consistency over many years. I highly recommend MJM Manufacturing to anyone looking for a reliable partner for complex, precision sheet metal parts and assemblies. I. Schechter, Former President of GBI Intralogistics Solutions, Current Owner/President of IPSTEC, Aventura, Florida

Richard Havass

As a customer, I have been working with MJM Manufacturing for approximately 35 years. The expertise of Mike Mijares and his team at MJM is top notch. Whenever I have a new part design, I typically review the design of the part with MJM to ensure that I am using the most cost-efficient manufacturing process to produce the parts as economically as possible. There was a part that we had made years ago using a progressive die to emboss a curved channel into a sheet metal part. The cost of the progressive die for this part was $55K. The redesign of the part from MJM consisted of $1200 in tooling to make the new part profile. Parts came out great and saved tens of thousands in tooling. Lastly, whether MJM produces a prototype or a production run, the appearance of the part is pristine, no tool marks or scratches on any part. In the 35 years that I have worked with Mike and his team, I have found them to be one big family. Mike’s love for his business is refreshing! You rarely see a person that is so charged to get up for work every day! Richard Havass Mechanical Engineering Manager JCI-Sensormatic

Sulen Ojeda Fuentes

Esta fábrica está llena de muy buenos profesionales son una gran familia trabajadores de años con muy buena experiencia .lo recomiendo porque son un gran equipo. Y realizan muy buen trabajo.