Custom Welding

We bring your ideas to life. Save money by curbing unnecessary fabrication cost. Our in-house expert metalworkers have experience in welding a variety of metals ranging from stainless steel, carbon steel, titanium and other unique metals.  Let us put our knowledge and experience to work for you.


Specialty Welding

Our engineers welcome unusual design challenges that require unique sizes, shapes or exotic metals. We use our design, certified welders and manufacturing engineers to ensure fabrication of your product.

Precision Metal Welding

With a national reputation for welding excellence, we handle every detail of your project. Our critical welding engineers provide manufacturing support with the following: 

  • Project scope and design
  • Experienced, certified welders with high proficiencies in
    • TIG or Gas Tungsten Arc Welding (GTAW) MIG, Sub-arc and Stick welding
    • MIG or Flux-Cored Arc Welding  (FCAW)
    • Stick or Shielded Metal Arc Welding  (SMAW)
    • Sub-arc or Submerged Arc Welding (SAW)
    • Along with RSW (Spot) | OXY‐Fuel
  • Certificate of Compliance (COC)
  • Manufacturing documentation

Robotic Welding

C4 Welding acquired 2 FANUC Robotic Welders in 2022. 

With these robotic welders, we have been able to take production welding to the next level for our customers by leaning out costs in tooling and labor.  Automated processes are making things faster, less expensive, and more efficient; and the welding sector has not been left behind.  Combining the latest technology with high-precision robotic welding and our expertise of critical welding we are able to exceed your expectations with quality welds in a timely manner.

Robotic Welding Achieves:

  • Cleaner, spatter-free welds, even beads, and improved cosmetic appearance
  • Highly accurate, increased strength and repeatable designs
  • Higher throughputs than manual welding

Trust C4 Welding, Inc. with your welding projects.  Our expert team of welders and programmers hold AWS certification to ensure the accuracy of your welding projects we complete with our robots.  These automated services require programming and supervision to do the job well and our certified technicians ensure the robots correctly execute their tasks.

About C4 Welding, Inc

C4’s original owner focused his business activities on providing high‐precision “critical” welding services. The portfolio of former and current customer projects is a roster of leading companies across many industries.

Over the years, C4 has consistently added more and more depth to our solutions, including large and small part machining services, manufacturing engineering, mechanical design, assembly, OEM manufacturing, and fabrication services. After the purchase of the Company from the original owner in 2013, C4 has accelerated the range of in-house manufacturing and engineering capabilities with the purchase of a 5 axis bridge mill, 2 vertical machining centers, manual lathes, the installation of a paint booth and more, we can handle your project in house from start to finish.

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Specialty & Critical Welding

C4 understands the urgency of projects, especially those with short time-lines. If you reach out to us with questions, know that we value your interest and will respond as quickly as possible.

Welding Processes

GTAW (Tig) | GMAW (Mig) | FCAW (Flux Core) | SMAW (Stick) | SAW (Sub‐Arc) | RSW (Spot) | OXY‐Fuel

You won’t find the same level of internal expertise when dealing with most welding companies. Our welding engineers are professionals, and we maintain the qualifications to meet the specifications of your critical welding projects. If you don’t see something on the list, please ask us. For more information, contact us. 

As a rule, C4 Welding’s weld procedures are qualified in accordance with these three specifications:

  1. ASME Sections VIII & IX
  2. AWS D1.1 (Steel), D1.2 (aluminum), D1.6 (stainless steel), D14.1 (material handling) & D17.1
  3. NAVSEA S9074‐AQ‐GIB‐010/248 (MIL‐STD‐248) and S9074‐AQ‐GIB‐010/278 (MIL‐STD‐278)

At the same time, many procedures conform to customer‐specific and other agency‐required standards such as:

  • NACE MR01‐75/ISO 15156‐X
  • DNV (Off‐Shore Standard) and DNV‐OS‐E101 (Drill Plant)
  • API Specification 6A/16A ASME B31.1 (Power Piping)
  • ASME B31.3 (process piping)
  • Ground Combat Vehicle Welding Code (aluminum 12472301) and (steel 12479550)

The previous lists were not intended to be all‐inclusive. Our highly skilled welding operators are cross‐trained and certified for a wide range of welding codes and processes. Please contact us if your specific welding code or process is not listed.


Our welding engineers and certified welders can support and weld a wide range of materials such as:   
Carbon Steel | 1008, 1010, 1011, 1015, 1018, 1020, 1040, A36, A366, A569, A588, A622, A786, A53, A500, A106, A335, A513, A333, 1026, 1027, A335 
High‐Strength Steels | Domex 100 XF, HY 100, A656 Gr., 80 A565 Gr. 80, A514, INX‐50, Ex‐Ten 50, A572 Gr. 50, A588 Mod, T‐1 Type A, T‐1 Type B, T‐1 Type C, A285, A515, A516, A715, A606, Crane Materials 
Stainless Steels | 304, 304/304L, 316/316L, 317, 321, 347, 405, 409, 410, 630, 15‐5, 17‐4, Duplex 
Alloy Steels | 4130, 4140, 4320, 4340, A204 GR B, SA 387, A517, 8620, A331, A286, Cor‐Ten A, Cor‐Ten B 
Nickel Alloys | AMS 5870, INCONEL 617, INCONEL 625, INCONEL 601, Monel 400, B443, A494, Hastelloy, Invar 36, Nitronic 50, Cobalt‐chrome, Stellite, 2.25cr‐1mo (Chrome Alloy), .5cr‐.5mo (Chrome Alloy), 1cr‐.5mo (Chrome Alloy) 
Aluminum | 3003, 5052, 5083, 5086, 6005, 6061, 6063, 6105, 356 Cast 
Other Materials | Titanium Grade 5 ‐TI‐6AI‐4V, A‐487 Grade 9, A27, Ductile Iron 60‐45‐15 Class M2, Ductile & Grey Iron A‐48 or A536.

The previous lists were not intended to be all‐inclusive. Please contact us if your specific material is not listed.

Tell us About Your Next Project

Our dedicated and knowledgeable team’s welding, machining and manufacturing experiences allows us to manage and build your projects on time while keeping your specifications in mind.
Ready to begin

Complex Manufacturing
Comprehensive Solutions

When certified precision is non-negotiable …
When exact specifications must be absolutely achieved or exceeded …
These are the complex manufacturing challenges C4 Welding solves every day.

C4 Welding’s, Commitment to our customer’s success and our community, having a Can – Do and responsive attitude, with the Capacity to quickly scale the operation to support customers’ Critical welding requirements, are the four core tenants that our name is built on, and are the factors that assure our customers they will receive what our name signifies. Learn more about our services.

You Ask, We’ll Answer

Let us know about your upcoming projects.

Street Address: 11 Industrial Blvd. | Sauk Rapids, MN 56379 USA

Phone: 320-253-2699Fax: 320.253.4804

Sales-Related Inquiries: 320-253-2699 |

Human Resources-related Inquiries320-253-2699 |

Hours of OperationMonday – Friday: 8:00am – 4:00pm