Cast Aluminum vs Cast Iron vs Steel Table Legs: Which Should You Use?

Short answer: For most dining tables, kitchen islands, and live edge builds, cast aluminum gives you the look and rigidity of cast iron at about a third of the weight, and it will not rust. Steel is the right call when you want a slimmer, more modern profile or the lowest price on a heavy duty leg. Cast iron is the traditional choice, but it is heavy, brittle, expensive to ship, and rusts wherever the coating chips. Wood belongs on a table where the legs should match the top and the table will live indoors. The rest of this guide explains why, with real weights and load ratings so you can decide for your own project.

The four materials at a glance

Weights for cast aluminum, steel, and wood are from our own product spec sheets. The cast iron figure is an estimate: iron is about 2.6 times as dense as aluminum, so a leg cast from the same pattern comes out roughly that much heavier.

Cast aluminum table legs

This is what we build most of our cast legs from, and it is what we recommend for the majority of table projects.

Cast aluminum starts as molten metal poured into a mold, the same way cast iron does. That is why it can carry the same heavy, sculpted shapes, raised lettering, and thick cross sections that people love about old iron table bases. The difference is what happens after the pour. Aluminum is far lighter than iron, it does not rust, and it is not brittle.

Here is what that looks like in practice, using our Michael collection as the example:

• A 28" dining height leg weighs 18.25 lbs, has an 18" mounting width, and is rated for 2,000 lbs per set.
• A 16" coffee table or bench leg weighs 8 lbs and is rated for 1,000 lbs per set.
• A 40" bar height leg weighs 30 lbs and is rated for 2,000 lbs per set.

A cast iron leg of the same size would weigh two and a half times as much. That matters twice: once when you pay for shipping, and again every time you move the table.

Where cast aluminum is the right choice:

• Live edge and slab tables, where the top is already heavy and you do not want the base to double the total weight
• Kitchen islands and dining tables that will get bumped and leaned on for decades
• Outdoor and covered porch tables, because aluminum does not rust even if the powder coat gets chipped
• Any project where you want the cast iron look without the cast iron problems

Where it is not the right choice:

• If you specifically want a thin, welded, modern profile. Casting produces thick sections by nature. For that look, go to steel.
• If you are on the tightest possible budget. Aluminum costs more per pound than steel, so a cast aluminum set will usually run a bit more than a comparable steel set.

Our cast aluminum legs are poured at foundries here in Ohio, powder coated, and packed and shipped from our warehouse in Fredericksburg. Every set ships with RAMPA threaded inserts and mounting bolts.

Cast iron table legs

Cast iron is the material most people picture when they think of a heavy industrial table base, and for good reason. It has been used for factory tables, sewing machine bases, and restaurant tables for well over a century.

We do not sell cast iron legs, and it is worth being clear about why, because the reasons are the same ones you should weigh for your own project.

• Weight. A cast iron 28" leg in a pattern like ours would weigh 45 to 50 lbs. A set of two is close to 100 lbs before you add the top. Freight on that is significant, and moving the finished table takes two strong people.
• Brittleness. Gray cast iron does not bend, it cracks. Drop a leg on a concrete floor during install and you can lose it. Aluminum in the same situation dents or scuffs.
• Rust. Iron rusts. Powder coat protects it until the coat is chipped, and then the rust starts underneath and lifts the finish. On an outdoor table this is a matter of a season or two.

Where cast iron still makes sense: restoring an antique piece where originality matters, or a build where the sheer mass of the base is the point, such as a machine stand or a table that must never be moved.

If you have been searching for "cast iron table legs" and landed here, what you are almost certainly looking for is the look and rigidity of cast iron. Cast aluminum gives you both. Browse the full cast leg collection to see the patterns.

Fabricated steel table legs

Steel legs are cut, bent, and welded from plate and tube rather than cast. That changes both the look and the economics.

Because welded steel can be thin and still strong, it is the material for clean, modern, geometric bases: trapezoids, U shapes, X frames, pedestals with flat plate columns. Our Ember Ridge legs are a good example. They come in nine sizes from 16" to 40", including narrow versions for sofa tables and desks, are rated for 750 lbs per set, and ship with threaded inserts, bolts, and adjustable feet levelers.

Where steel is the right choice:

• Modern and industrial designs where a slim profile matters
• Desks, benches, and sofa tables that need a narrow footprint
• Restaurant and commercial tables, where a pedestal base keeps legs out of the way of chairs. Our Forge and Ironbound bases are built for that.
• Getting the most load capacity per dollar

The tradeoffs:

• Steel rusts once the coating is scratched through, so it is a less forgiving choice outdoors than aluminum.
• Hollow tube designs can ring or flex more than a solid casting. Plate steel designs are stiffer than tube.
• You do not get the sculpted, raised detail that casting produces. Steel is about lines, not ornament.

Our steel bases are fabricated by shops here in Ohio and powder coated. Standard color is flat black; we can run any Prismatic Powders color on request, including brass tones, for a custom order.

Solid wood table legs

Wood is the traditional material, and for a farmhouse or Shaker table where the base should match the top, nothing else looks right.

Our Chunky Farmhouse legs are turned from solid maple or oak, come unfinished and sanded to 150 grit, and weigh about 10 lbs each at 28.5" tall. They are sold in sets of four, starting at $130.

What to know before choosing wood:

• Wood legs need an apron or stretcher system to be rigid. The legs alone do not resist racking the way a metal trestle does, so plan on aprons with mortise and tenon or a good bracket system.
• You will finish them yourself, which is a feature if you want them to match a custom stained top and a chore if you do not.
• Wood moves with humidity. Indoors this is a non issue with proper joinery. Outdoors, choose something else.
• No mounting hardware is included, because wood legs attach through joinery or aprons, not bolts into inserts.

Which material for which project

Live edge dining table on a 2" walnut slab: cast aluminum, 28" height. The slab is already heavy. You want a base that is rigid and looks substantial without pushing the whole table past 200 lbs. Add a stretcher rod if the table is over 6 feet long.

Kitchen island or work table: cast aluminum at 34" counter height, or steel if you want a cleaner modern base. Either way, look for a 2,000 lb rating; islands get leaned on, sat on, and loaded with stone tops.

Modern desk or sofa table: steel, narrow version. A 28" narrow Ember Ridge has a 12.25" mounting width and 17.5" widest point, which fits a 14" to 18" deep top without overhang problems.

Bench or coffee table: cast aluminum at 16" or 18". The 16" Michael legs weigh 8 lbs each and are rated for 1,000 lbs, which is more than any bench will see.

Outdoor or porch table: cast aluminum, no question. It is the only one of the four that shrugs off a chipped coating.

Restaurant or bar tables: steel pedestal base. One column, four feet, nothing for chairs to hit. Forge and Ironbound are the ones our commercial customers order most.

Farmhouse or Shaker table with a matching stained top: wood, with aprons. Nothing else will look right.

Getting the height right

Leg height plus top thickness equals finished table height. Standard finished heights:

• Coffee table: 16" to 18" finished. Use 16" legs.
• Bench: 18" finished. Use 16" or 18" legs depending on top thickness.
• End or side table: 22" to 24" finished. Use 22" legs.
• Dining table and desk: 29" to 30" finished. Use 28" legs with a 1" to 2" top.
• Counter height: 36" finished. Use 34" legs.
• Bar height: 42" finished. Use 40" legs.

That covers height. For how wide a top a given leg can carry, where to set the legs along the length, and when you need a stretcher rod, read our table leg height and size guide. Every product page on our site also has a size chart with height, mounting width, widest point, weight, and capacity for each size, plus a CAD drawing download so you can check clearances before you order.

Frequently asked questions

Is cast aluminum as strong as cast iron for a table?

For a table, yes. Our 28" cast aluminum legs are rated for 2,000 lbs per set. A dining table with a thick slab top and a full holiday spread is nowhere near that. Cast iron is stiffer per unit of cross section, but the castings are sized so that the difference does not matter for furniture loads.

Will cast aluminum legs wobble on a long table?

Two trestle style legs on a table over about 6 feet can rack side to side no matter what the legs are made of. A stretcher rod between the legs fixes it. We sell stretcher rods sized to our legs and it is the most common add on to a dining set. The sizing guide covers this in detail.

Can I use metal table legs outdoors?

Cast aluminum, yes. Powder coated steel, yes with the understanding that a deep scratch will eventually rust. Cast iron, only if you are diligent about touching up the finish. Wood, no.

How do the legs attach to the top?

Our cast aluminum and steel legs ship with RAMPA threaded inserts and bolts. Drill the top, thread in the inserts, and bolt the legs on. It is a stronger and more removable connection than lag screws. Wood legs attach through aprons and joinery. The full process, with adjustments for live edge, butcher block, epoxy, and thin tops, is in our attachment guide.

Do you ship the same week?

Stocked sizes ship within 2 days from Fredericksburg, Ohio.

Can I get a color other than black?

Yes. Standard is flat black. We can powder coat any Prismatic Powders color, including brass and bronze tones, as a custom order. Call us at 1 (800) 920-8066 to set that up.

Still not sure which way to go? Send us a photo of your top and a note about where the table will live, and we will tell you which leg we would use. Contact us here or call 1 (800) 920-8066.