Where to Buy Steel for Blacksmithing

Local steel suppliers: the default answer

Every mid-sized US town has a steel supplier or metal service center - the businesses that sell structural steel to fabricators and welders. They are the cheapest source of new forging stock, and nearly all of them will sell to a walk-in with cash or a card, even if the loading dock looks intimidating.

Ask for hot-rolled A36 round or square bar. A36 is the standard structural mild steel (roughly 0.25% carbon or less), it forges beautifully, and it is what 90% of beginner projects should be made from. Hot-rolled matters: it costs less than cold-rolled and the gray mill scale is irrelevant when you are heating the bar anyway.

Practical notes for the first visit:

• Steel sells by the 20 ft stick. In beginner sizes - 1/4, 3/8, and 1/2 in - expect roughly $1-2 per foot, cheaper per pound as bars get bigger. Most yards will shear sticks in half for free or a dollar so they fit in a car.
• Ask about the remnant or drop rack. Offcuts often go for scrap-adjacent prices by the pound.
• Call ahead and ask if they have a will-call counter and a minimum order. Many have a $20-50 minimum, which conveniently equals a nice starter bundle.

To convert between feet and pounds when comparing quotes, use the steel bar weight calculator - suppliers quote per foot, per pound, or per stick depending on mood.

Big-box stores: convenient, but 3-5x the price

Home Depot, Lowe's, Ace, and Tractor Supply all carry a small rack of "weldable steel" - plain low-carbon rod, flat bar, and angle in 3-6 ft lengths. It forges fine. The problem is price: a 1/2 in x 3 ft plain round rod runs about $9-10 at big-box stores (over $3 per foot), while the same diameter A36 from a steel yard costs a third of that or less.

Use the big-box rack for what it is good at: a single bar for tonight's project, odd hours, or towns with no steel supplier. Two cautions. First, buy only the plain (uncoated) steel - the same racks hold zinc-plated rod and galvanized pieces that must never go in a forge. Second, some of the rod is cold-rolled 1018 rather than A36; it forges the same for hooks and practice, so do not overthink the label at this stage.

Online metal suppliers

If no yard is nearby, several established online suppliers sell small quantities of new steel with no minimums (no affiliation - listed alphabetically as known options):

• Metal Supermarkets - a franchise with 135+ physical stores across North America plus online ordering; useful because you can also walk in and buy cut pieces the same day.
• OnlineMetals - large catalog of A36 and 1018 bar in short cut lengths, ships small parcels.
• Speedy Metals - similar range, sells A36 flat, round, and square in beginner-friendly cut sizes.

Expect to pay a real premium per pound versus a local yard once shipping is added - heavy, dense packages are exactly what parcel carriers charge the most for. Online ordering makes the most sense for odd sizes a local yard will not stock in small quantity, precision-cut pieces, or specific alloys. For everyday A36 practice stock, a local supplier or even the big-box rack usually beats shipped steel on total cost.

Knife steel: buy known grades from specialist suppliers

The moment a project needs heat treating - knives, chisels, punches, springs - switch from mystery steel to a known grade, because every quench-and-temper recipe assumes you know what the steel is. The beginner-friendly trio:

• 1084 - the classic first knife steel. Near-eutectoid carbon (~0.84%), hardens well in fast quench oil with a simple one-temperature heat treat.
• 1095 - more carbon, holds a fine edge, but demands a faster quench and tighter temperature control. Compare the two in 1084 vs 1095.
• 5160 - the leaf-spring alloy, extremely tough, ideal for choppers and the springy tools that mild steel cannot make.

Two long-standing US specialist suppliers are New Jersey Steel Baron and Alpha Knife Supply, both of which stock these grades as flat bar sized for blades; plenty of knifemaking shops carry them too. A blade's worth of 1084 typically costs $8-20, trivial next to the hours you will put into it. See the knife steel comparison for how the common grades trade toughness against edge holding, and the beginner heat-treating guide before you buy anything fancier.

The scrapyard strategy

Scrapyards, farm auctions, and mechanic shops sell forging stock by the pound - often $0.25-0.60/lb where yards sell to the public at all (many are buy-only; call first). Scrap is how smiths have always sourced spring and tool steel cheaply, with two rules: know what an item probably is, and test before trusting it in anything that matters.

The reliable finds:

• Leaf springs - typically a 5160-type spring steel. Great for choppers, tongs, and springy tools. Inspect for rust pitting and fatigue cracks; a cracked spring hides more cracks.
• Coil springs - similar spring-steel family; straightening the coil is honest forging practice by itself.
• Axles and shafts - usually medium-carbon (1040-1050 class); good for hammers, drifts, and top tools.
• Old files - high-carbon (1095/W1 class) if they are quality files and not case-hardened junk; test a corner.
• Sucker rod (oilfield) - varied alloys, commonly 4130-ish; excellent tong and tool-body stock.

Two famous items deserve caveats. Rebar is made to ASTM A615 strength grades, not chemistry - composition swings bar to bar, so treat it as free practice steel for stakes and garden art, never for tools. Railroad spikes marked HC are "higher carbon" only by track-spike standards: the governing spec (ASTM A65) tops Grade 2 out around 0.30% carbon, mild-to-medium at best. Spike knives are a fun novelty - see the railroad spike knife guide - but they will not hold an edge like real knife steel, and sourcing spikes legally means buying them, not pulling them.

The 60-second junkyard steel test

Two quick tests sort scrap before you invest forge time in it.

Spark test. Touch the piece to a bench grinder next to a bar of known mild steel and compare. Low-carbon steel throws long orange streaks with only a few forks; as carbon rises the stream gets busier, and true high-carbon steel erupts in dense, bushy white bursts that start close to the wheel. Dull, short, reddish sparks suggest cast iron - not forgeable. It takes a few comparisons to calibrate your eye, which is why you always grind the known bar first.

Quench test. Forge a small coupon of the mystery steel, heat it until a magnet no longer sticks (around 1400F) plus one shade brighter, and quench it in oil. If a file skates off the surface instead of biting, the steel hardened - it has enough carbon for blades and tools. If the file bites, try again with a water quench on a fresh coupon (carefully - water cracks some steels); if it still stays soft, treat it as mild steel and use it accordingly. Match the quench to the steel with the quench calculator once you know what you are working with.

Steel to avoid, no matter how free

Some metal is not worth the risk or the frustration:

• Galvanized or zinc-plated anything - fence posts, pipe, hardware-store brackets, plated rod. Heating zinc releases fumes that cause metal fume fever (NIOSH documents the chills-fever-nausea syndrome that follows a few hours after exposure). The dull gray or spangled coating is the tell. Do not grind it off and forge it anyway; pits keep zinc, and the grinding dust is its own hazard.
• Chrome or nickel plated steel - old bumpers, shafts, tools with bright mirror finishes. Heated plating releases its own toxic fumes and contaminates the forge.
• Cadmium-plated fasteners - common on older aircraft and automotive bolts, often a dull gold tint. Cadmium fumes are seriously toxic.
• Sealed or pressurized anything - tanks, cylinders, struts, shocks. Heat plus a closed volume is a bomb, not a project.
• Cast iron - engine blocks, radiators, old window weights. It crumbles under the hammer instead of forging.
• Mystery steel for struck tools - hammers, hardy tools, and anything hit by or hitting hardened steel should be made from known stock. An unknown alloy that hardens unpredictably can chip and send fragments flying.

When in doubt, spend the couple of dollars on new bar. Cheap steel is only cheap if it cannot hurt you.