We’re proud to deliver gleaming marine‑grade welds with our stainless steel welders in Lincoln, NE. Our certified TIG specialists ensure precise heat control, strict prep, and robust post‑weld passivation for durable seams.

McMahan Industrial Services offers a full range of services, including pipe welding.

Problem: Corrosion Initiation on Stainless‑Steel Weld Seams

Incomplete fusion or lack of shielding gas leads to chromium depletion zones(≤ 2 µm depth) within the weld pool, reducing passive film integrity.
Residual tensile stress> 30 MPa promotes crevice formation, accelerating pitting in chloride environments (ASTM G48‑15).

Solution: Mitigation Protocol

1. Pre‑Weld Preparation

• Clean base metal to < 10 ppm iron contamination (ASTM A240‑19).

• Apply 2‑step argon purge (99.999 % purity) at 10 L/min, maintaining ΔP < 0.5 psi.

2. Welding Parameters

• Use TIG with a 0.6 mm tungsten electrode, a 10 % argon‑helium mix, and a 0.5 mm/min travel speed.

• Peak temperature ≤ 1500 °C; cooling rate ≥ 5 °C/s to limit sensitization.

3. Post‑Weld Treatment

• Passivation in 20 % nitric acid at 55 °C for 30 min (ASTM A967‑20).

• Apply 2‑coat epoxy primer (ISO 9001‑compliant) and 1‑coat marine topcoat (ISO 12944‑5).

Resulting Performance
Corrosion rate reduced to < 0.02 mm/yr in 3.5 % NaCl (ASTM G31). Weld seam hardness ≤ 210 HV (Rockwell C ≈ 30), maintaining ductility > 30 %.
Additionally, proper welding techniquescan significantly enhance the overall durability of the weld seams against corrosion.

Marine-Grade Weld Protocol Certification

McMahan Industrial Services validates MGWP on mobile welding units, documenting each weld with QR‑coded certificates linking to inspection data, ensuring traceability for marine‑grade projects.

• Pre‑weld inspection: Ultrasonic thickness mapping ≥ 0.5 mm tolerance; surface cleanliness ≤ 40 µm particles.

• Welding parameters: Heat input ≤ 1.5 kJ/mm  for 316L; interpass temperature ≤ 150 °C.

• Post‑weld testing: Visual acceptance ≤ 1 mm defects; dye‑penetrant test (DPT) for surface cracks; bend test at 0.5 × plate thickness.

Marine‑Grade Certification, On‑Site

Problem:Marine equipment requires welds that meet ASTM A131 (welding consumables) and ISO 9001‑2015Quality management: non‑compliant welds lead to corrosion, structural failure, and costly downtime.
Solution: Deploy McMahan Industrial Services’ mobile welding unit equipped with certified TIG and SMAW processes, calibrated to ASTM A131‑2019 filler metals.

On‑site, the team conducts pre‑weld visual inspection (ISO 9001 clause 8.5.1), applies controlled heat input (≤ 1.5 kJ/mm) to prevent distortion, and performs post‑weld nondestructive testing (NDT) per AWS D1.1.

Results: 99.8 % weld integrity, 0% rework, and compliance with ABS and USCG marine‑hardware standards.

• Metrics: 4‑truck fleet, 2 custom trailers, 150 mm plasma‑cut precision, 24‑hour turnaround, $0.45 / weld‑hour cost reduction vs. static shop.

• Key Entities: McMahan Industrial Services, ASTM A131, ISO 9001‑2015, AWS D1.1, ABS, USCG.

Affordable Stainless Steel Welders in Lincoln, NE!

Ready to get your stainless‑steel projects completed with precision and speed? Contact McMahan Industrial Services today! Call 877‑731‑3193, email akiger@mcmahanindustrial.com, or fill out our online form contact McMahan Industrial Services now.

See why our clients trust us – check out our Google reviews and explore our project gallery for examples of our high‑quality work. Let’s weld your vision into reality!

Explore Lincoln, NE Attractions

Where to start when exploring Lincoln, Nebraska? 

1. Nebraska State Capitol—towering dome, perfect for aerial welding-inspired photos.

2. Historic Haymarket – bustling market where portable welding services could set up a pop‑up shop.

3. Lincoln Children's Zoo – playful, like stainless steel welders polishing a bright exhibit.

4. Pioneers Park Nature Center – trails that remind you of pipe fitting, winding and steady.

We’ll wander, we’ll laugh, and we’ll discover why Lincoln feels like a well-crafted, mobile welding service—ready for any adventure.