Stage 4 Operator
50-Job Graduation Portfolio
The portfolio is the credential. Anyone who can show 50 jobs at this level β with photos, parameters, and inspection notes β has earned Stage 4 designation regardless of what certifications they hold.
Jobs 1β20
Foundation
The first 20 jobs every operator should weld and document.
- 01.Lap joint, mild steel 1.5Γ1.5 mm, 200 mm seam
- 02.Lap joint, mild steel 1.5Γ3 mm, 200 mm seam
- 03.Lap joint, mild steel 3Γ3 mm, 300 mm seam
- 04.Butt joint with backing, mild steel 3 mm, 200 mm
- 05.Butt joint with backing, mild steel 6 mm, 200 mm
- 06.Fillet T-joint, mild steel 3 mm vertical to 6 mm horizontal, both sides, 300 mm
- 07.Edge weld, mild steel 1.5 mm, 200 mm
- 08.Lap joint, stainless 304 1.5Γ1.5 mm, with backing gas, 200 mm
- 09.Fillet T-joint stainless 304, 3Γ3 mm, 200 mm
- 10.Lap joint, aluminum 5052 1.5Γ1.5 mm, 200 mm
- 11.Lap joint, aluminum 6061 1.5Γ1.5 mm, with 4043 filler wire, 200 mm
- 12.Spot weld series, stainless 0.5Γ0.5 mm, 50 spots
- 13.Repair weld β fix porosity defect from job 1 by grinding and re-welding
- 14.Vertical-up fillet, mild steel 3Γ3 mm, 200 mm
- 15.Vertical-down fillet, mild steel 3Γ3 mm, 200 mm
- 16.Overhead lap, mild steel 1.5Γ1.5 mm, 100 mm
- 17.Multi-pass fillet, mild steel 6Γ12 mm, three passes, 300 mm
- 18.Plug weld series, mild steel 3Γ3 mm, 10 plugs
- 19.Continuous corner weld, sheet metal box, 4 corners Γ 100 mm
- 20.Round-tube to flat-plate fillet, full circumference, mild steel
Jobs 21β35
Application
Real-world application jobs across body, food-grade, marine, and electronic substrates.
- 21.Auto body panel repair (real or test), galvanized steel
- 22.Stainless food-grade enclosure corner, sanitary weld
- 23.Aluminum boat hull patch, 5052, with passing pressure test
- 24.Cast iron repair β preheat required, nickel filler
- 25.Mild steel exhaust component, 1.5 mm tube to flange
- 26.Stainless handrail joint, 1.5" tube to elbow, three positions
- 27.Aluminum gusset to extrusion, 6061, structural fillet
- 28.Brass decorative joint, autogenous, no porosity
- 29.Tool steel knife bolster to blade, dissimilar joint with documented procedure
- 30.Copper-to-brass joint (specialty: green/blue laser or pulsed fiber)
- 31.Battery tab to nickel terminal, 0.2 to 0.5 mm, controlled energy
- 32.Heat exchanger tube-to-tubesheet, stainless, 50 joints
- 33.Stainless pressure vessel longitudinal seam, 6 mm, with X-ray
- 34.Galvanized structural square tube to plate, fillet, with proper venting
- 35.Mixed-material assembly: aluminum bracket to steel frame, documented procedure
Jobs 36β50
Mastery
Stage 4 mastery jobs β WPS development, NDE coordination, customer-accepted production.
- 36.Develop a WPS for a job you haven't done before β qualified to AWS D1.1 or equivalent
- 37.Train a Stage 1 operator through their first 50 lap joints
- 38.Diagnose and repair another operator's failed weld (root-cause analysis required)
- 39.Aluminum 6061 structural fillet that passes a destructive bend test
- 40.Stainless 316L sanitary weld passing borescope inspection
- 41.Multi-position pipe weld, single-V groove, 6" pipe, all-position, with passing radiograph
- 42.Hot-cracking-prone alloy weld (6063 or A356) with no cracks at 10Γ magnification
- 43.Dissimilar joint with engineering justification β material selection, IMC analysis, life prediction
- 44.Production run, 200 parts, with documented reject rate and process improvements
- 45.Custom fixture design and qualification for a recurring job
- 46.Hybrid joining process (laser + adhesive, laser + mechanical) for specific application
- 47.Procedure development for a new alloy β cold start to qualified WPS
- 48.NDE coordination β work with a third-party inspector through passing radiograph or UT
- 49.Repair welding on heat-treated structural steel without compromising heat treatment
- 50.A weld that goes into a customer's product, billed and accepted, with no rework
Documentation = photos before/during/after, parameters used, post-weld inspection notes. Operators logged in to InPulse Logic can track these jobs in their own progression log.

