Steel vs. aluminum fencing: what is the difference?

Ornamental steel is mild (low-carbon) steel, commonly ASTM A36 bar stock, fabricated and welded into pickets, rails and decorative detail. It gives you the classic black, hand-worked look with real structural strength behind it.

For a homeowner, the meaningful comparison is steel versus aluminum. At CJM we build with steel, designed, welded and installed by hand, one project at a time — we do not do aluminum-kit assembly, we fabricate the real thing.

That hand-built steel is what lets us do custom gates, fences and railings that hold up structurally and carry detail a lightweight kit never could.

Steel is the strongest of the two by a wide margin. It resists impact, bending and forced entry, which is why it is the standard for security fencing, driveway gates and anywhere a fence needs to take abuse. It is also the heavier metal, so posts have to be set deep and solid in concrete, which matters in North Texas where dense, expansive clay soil already calls for substantial footings, often around two feet deep depending on fence height and local practice.

Aluminum is much lighter, typically a third or less of the weight of comparable steel. That makes it easier to handle and install on slopes, but a hard hit from a vehicle, a fallen branch or a lawnmower can dent or bend a residential aluminum picket where steel would shrug it off.

For a security gate, a tall perimeter fence, or anything that has to stop or slow people, choose steel. For a pool fence, a garden divider or a decorative front-yard run where appearance matters more than impact resistance, aluminum is usually adequate.

This is the clearest trade-off. Steel will rust if water reaches bare metal, so its protective finish is doing the real work. Aluminum forms a thin natural oxide layer that stops corrosion on its own, so it does not rust even if the coating is scratched. In wet or coastal settings that gap is decisive, and even in DFW it matters at sprinkler lines, splash zones and low spots that stay damp.

The good news for steel in our climate: Dallas-Fort Worth is relatively dry, and a properly finished steel fence holds up well for decades. The right finish is what makes the difference. Hot-dip galvanizing coats the steel in zinc for strong corrosion protection, and a powder-coat topcoat adds color and helps resist the intense Texas UV that fades and chalks cheaper paint. Galvanized-then-powder-coated steel is the combination we recommend for longevity here.

Aluminum almost always comes powder-coated as well. Because the base metal cannot rust, a chip or scratch is cosmetic rather than the start of a corrosion problem, which is why aluminum is the lower-maintenance option year over year.

Maintenance: A well-finished steel fence needs little day to day, but over the years you should touch up any chips or scratches before rust can spread, and a neglected steel fence will eventually corrode. Aluminum is close to zero maintenance; rinsing it with a hose is usually all it needs.

Cost (general DFW market estimates, varies by design and site): Installed ornamental steel commonly runs around $30 to $60 per linear foot, and heavy or detailed custom work with scrollwork and finials can run higher, often into the $65 to $100 range or beyond. Installed aluminum tends to land in a similar $30 to $60 per linear foot band, often a bit less for comparable residential styles, and it can save on shipping and labor because it is lighter. North Texas clay soil can add to footing and prep costs for either material. These are market ranges, not a CJM price; for an exact figure on your project, request a quote.

Look: Both can be built in the classic black ornamental style. Steel allows heavier pickets, true hand-worked detail, and a substantial feel that reads as permanent and high-end. Aluminum mimics that look well from a distance but uses lighter, often hollow sections up close. For custom artistic gates and railings where the metalwork itself is the statement, steel gives a maker far more to work with.

Choose steel for driveway and entry gates, automated gates, security and perimeter fencing, tall fences, and any custom railing or gate where strength, permanence and hand-worked detail matter. Specify hot-dip galvanizing plus powder coat for the longest life in Texas heat and sun.

Choose aluminum for pool enclosures (its rust resistance suits constant splash and chemical exposure), lightweight decorative fencing, sloped yards, and budget-conscious runs where you want the ornamental look with minimal upkeep.

If you are unsure, the deciding questions are usually: does it need to be secure, and will it take impact? If yes, steel. Is it mainly decorative or near constant water with a tight maintenance budget? Aluminum. CJM designs, welds and installs custom steel gates, fences and railings by hand across Arlington and the wider DFW metroplex; call (214) 603-9142 or email support@cjmmetals.com to talk through the right material for your site.