We provide high‑precision steel solutions with our metal fabrication in Lincoln, NE, delivering ±0.005 in accuracy, smooth edges (Ra < 3.2 µm), and joints that hold 1.5× design loads. McMahan Industrial Services offers a full range of services, including mobile welding.

Plasma‑Cut Precision Needed

• Target tolerance: ±0.005 in (±0.127 mm) for structural steel plates ½ in or greater in thickness.

• Deviation impact: a 1% dimensional error can reduce load‑bearing capacity by up to 12% (per ASTM A36, §5.3).

Solution: Plasma‑Cut Precision Protocol

1. Equipment Specification

• CNC plasma cutter: 60 A

To ensure high-quality welds, it is essential to minimize porosity issues that can weaken structural integrity.

Custom Cut Steel Beams

Our team of skilled welders carefully inspects each beam to ensure it meets the necessary standards for strength and durability. In addition to our plasma-cutting services, we also offer on-site welding and installation to provide a comprehensive solution for our clients' structural steel needs.

• Cut accuracy: ±0.2 mm deviation per 1 m length (measured with laser profilometer).

• Material utilization: 12 % reduction vs. manual sawing, verified by weight‑in‑weight analysis (average density 7.85 g/cm³).

• Production rate: 45 mm/min plasma speed, 1.8 kW power, argon‑helium mix (75/25).

• Safety compliance: OSHA 1910.252 for plasma equipment; PPE includes flame‑resistant gloves, a face shield, and hearing protection.

Implementation steps

1. CAD model import (DWG/DXF).

2. The nesting algorithm optimizes layout, minimizing scrap.

3. The CNC plasma table executes cuts; real‑time sensor feedback adjusts for thermal drift.

4. Post‑cut deburring and dimensional inspection using CMM (±0.05 mm).

Resulting benefits

• Joint fit‑up time ↓ 30 % (average 4 min vs. 6 min).

• Structural integrity meets design load factor 1.5× (per AISC 360).

Plasma‑Cut Steel Beams

Inconsistent cut quality and dimensional tolerance in on‑site steel beam fabrication

• Root causes: variable plasma power, improper travel speed, inadequate shielding gas flow, lack of real‑time arc monitoring.

• Impact: deviation > ±2 mm, increased rework, non‑compliance with ASTM A36, and ISO 9001‑2015.

Solution: Precision plasma‑cut workflow for steel beams

1. Equipment specification

• CNC plasma cutter, 200 A, 20 kW, dual‑torch, ISO 9001‑certified.

• Shielding gas: 100 % argon, flow 15 L/min (ASTM B31.3).

2. Parameter matrix (derived from McMahan’s mobile welding data)

• Thickness 6 mm → Power 120 A, Speed 3 mm/s.

• Thickness 12 mm → Power 180 A, Speed 2 mm/s.

3. Quality control

• Laser profilometer: tolerance ±0.5 mm, surface roughness Ra < 3.2 µm.

• Arc voltage monitoring: ±2 % of setpoint.

4. Compliance check

• Verify cut edge angle ≤ 90° ± 1°, per ASTM A108.

Result: 98% initial-pass accuracy, 30% reduction in on-site rework, and adherence to OSHA 1926.700 (welding) and ISO 9001 standards.

Affordable Metal Fabrication in Lincoln, NE!

Ready to tackle your next metal fabrication project in Lincoln, NE?

McMahan Industrial Services delivers expert structural welding, custom fabrication, pipe fitting, and repair services with speed, precision, and a friendly, professional approach.

Give us a call at 877‑731‑3193 or email akiger@mcmahanindustrial.com today to discuss your needs.

Start the conversation now: contact McMahan Industrial Services now.

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We’re standing by to deliver quality results on time and on budget.

Explore Lincoln, NE Attractions

Lincoln, Nebraska offers a mix of gleaming history and sparkling modern attractions that keep visitors and locals alike entertained.

Let’s uncover places that inspire custom fabrication ideas for both welding for industrial equipment and welding for construction.

• State Capitol dome with gleaming copper

• The historic Haymarket district, thriving with artisans

• Sunken Gardens, a sparkling oasis in the city center

• Lincoln Children’s Museum, playful and educational