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Navy NEC · Engineering

B20A Advanced Steelworker

Current service use not established

This code is listed in the directory. Inclusion alone does not confirm current service use.

A Navy Enlisted Classification: a skill designation sailors hold in addition to their rating. Part of the Steelworker rating

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Overview

The Advanced Steelworker sets up welding equipment, welds ferrous and nonferrous metals, prepares plate and pipe joints, and fabricates sheet metal parts. This steelworker plans and estimates minor jobs, assembles and disassembles steel structures, and lays out and splices wire rope.

Core Skills

  • Plate and pipe joint preparation for all positions
  • Flat-position nonferrous gas metal and tungsten arc welding
  • Wire rope strength calculations, splicing, and attachments
  • Sheet metal layout, fabrication, and joining

Civilian Career Paths

Career associations are editorial assessments of the cited evidence, not an official crosswalk unless the evidence explicitly says so. O*NET supplies civilian occupation information, not proof of a military match. Related experience does not confer civilian qualifications. Tasks and tools below describe civilian work, not military training.

Structural Metal Fabricators and Fitters

Military metal layout, plate and pipe joint preparation, welding, and sheet metal fabrication provide directly transferable fabrication skills.

How to prepare: Practice a blueprint-based fit-up project, checking the laid-out parts and finished assembly against the drawing dimensions.

What the civilian work involves
  • Verify conformance of workpieces to specifications, using squares, rulers, and measuring tapes.
  • Position, align, fit, and weld parts to form complete units or subunits, following blueprints and layout specifications, and using jigs, welding torches, and hand tools.
  • Lay out and examine metal stock or workpieces to be processed to ensure that specifications are met.
Civilian tools and software (examples)
  • Computer aided design and drafting CADD software

Structural Iron and Steel Workers

Knowledge of steel structure assembly and disassembly, wire rope attachment work, and minor-job material estimating transfer to structural steel erection work.

How to prepare: Practice reading a structural steel erection drawing to identify member locations, bolted connections, and material quantities.

What the civilian work involves
  • Read specifications or blueprints to determine the locations, quantities, or sizes of materials required.
  • Connect columns, beams, and girders with bolts, following blueprints and instructions from supervisors.
  • Fasten structural steel members to hoist cables, using chains, cables, or rope.
Civilian tools and software (examples)
  • Cost estimating software

Notes & Sources

Evidence for this guidance (3 documents)
  1. NAVPERS 18068F Vol II (NEOCS, Jul 2026 edition): NEC B20A - Advanced Steelworker

    [1] NEC entry 'B20A - Advanced Steelworker' at normalized cached-text lines 2385-2392 (raw file lines 2343-2350); the combined award-route block sits at normalized lines 2374-2377 (raw 2333-2336) and is not duty evidence

    Supports: Plate and pipe joint preparation for all positions, Flat-position nonferrous gas metal and tungsten arc welding, Wire rope strength calculations, splicing, and attachments, Sheet metal layout, fabrication, and joining, Structural Metal Fabricators and Fitters (O*NET 51-2041.00), Structural Iron and Steel Workers (O*NET 47-2221.00)

  2. O*NET: Structural Metal Fabricators and Fitters

    [2] O*NET 30.3 occupational data

    Supports: Structural Metal Fabricators and Fitters (O*NET 51-2041.00)

  3. O*NET: Structural Iron and Steel Workers

    [3] O*NET 30.3 occupational data

    Supports: Structural Iron and Steel Workers (O*NET 47-2221.00)

Defense contractor jobs for B20A

Descriptions may be summarized for clarity. Verify all information with your branch career counselor or official military documentation before making career decisions.

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