Why Forge a Leaf?

Few exercises in the forge teach so much in so little time as a forged leaf. Starting with a humble length of flat bar, you will practise drawing out, tapering, veining, bending and finishing — all core skills that transfer to gates, railings, fire irons and sculptural work. The leaf is forgiving: if a vein wanders or a curve isn't quite symmetrical, it still looks natural. That makes it ideal for beginners and a satisfying warm-up for experienced smiths. Best of all, you can forge a presentable leaf in under an hour once you know the steps.

Choosing and Preparing Your Flat Bar

For a leaf around 150–200mm long, start with mild steel flat bar measuring roughly 20mm wide by 5mm thick. A slightly wider bar, say 25mm, gives a broader leaf; thinner stock under 4mm can burn away quickly. Cut a length of about 200mm — enough for the leaf and a short stem to hold with tongs.

Before you heat, consider the grain of the steel. Mild steel is forgiving, but you should always work at a bright orange to yellow heat (around 1,100–1,200°C). If the metal sparks or looks like a sparkler, it's too hot. If it's dull red, it's too cold and you risk cracking. Keep a bucket of water or a quenching tank nearby, but don't quench the leaf until you're finished shaping — air cooling is fine.

Tapering the Stem and Tip

The classic leaf shape starts with a taper at both ends. Hold the bar with the end you want to become the stem over the anvil's edge. Using a cross-peen or rounding hammer, draw the metal down to a rounded point. Work from the centre of the bar outward, turning the work 90 degrees regularly so the taper stays even. Aim for a stem roughly 6–8mm wide where it meets the leaf body.

Next, taper the opposite end into the leaf's tip. This taper should be longer and flatter — think of a willow or oak leaf. Use the anvil's horn to help stretch the metal. Strike with the hammer face angled slightly so you're pushing metal forward rather than just flattening it. If the edges fold, dress them flat with a light planishing blow. Remember: heat, hammer, and repeat. Rushing a taper leads to cold shuts and a lumpy profile.

Veining and Adding Detail

With the basic silhouette formed, it's time for the veins that bring the leaf to life. Bring the leaf to a bright orange heat and place it flat on the anvil. Using a hot cut or a blunt chisel, strike a centre line from stem to tip. Don't cut through — you want a groove, not a split. A single firm blow with a 1kg hammer and a chisel held at about 45 degrees works well.

For side veins, angle the chisel diagonally from the centre line towards the edges. Work from the stem outward, spacing them 8–12mm apart. You can also use a fuller or a rounded punch to create softer, more organic veins. If the metal cools, reheat. Veining is best done in one or two heats so the lines stay crisp. A light wire brushing between heats removes scale and lets you see your progress.

Shaping and Curling the Leaf

A flat leaf looks unnatural. To give it life, bend it along its length. Hold the stem in tongs and lay the leaf over the anvil's horn. Gently hammer the edges to curve the leaf upward, or use a scrolling wrench to introduce a sinuous S-curve. For a cupped leaf, place it face down over a shallow swage block or a hollow in a tree stump and strike the centre with a wooden mallet. This stretches the middle and draws the edges upward.

You can also curl the stem into a hanging loop or a hook. Work at a low red heat for bending to avoid cracking. If you want a natural twist, grip the tip with tongs and turn the stem while the leaf is hot. Small adjustments are best made cold with a vice and an adjustable wrench, but never force cold steel — it will snap.

Finishing and Finishing Touches

Once you're happy with the shape, let the leaf cool slowly in air. Wire brush it vigorously to remove scale, then apply a finish. For a traditional black finish, heat the leaf to a dull red and rub it with beeswax or linseed oil — the wax will smoke and soak into the surface, leaving a deep satin sheen. For outdoor use, a coat of clear metal lacquer or a wax-oil mixture will slow rust. If you prefer a polished look, sand progressively from 120 to 400 grit before waxing.

Leaves like this can be riveted to a gate, welded into a bundle, or used as a decorative key fob. Experiment with different tapers, vein patterns and curves. Each leaf teaches your hammer hand something new. So light the forge, grab a length of flat bar, and see what grows.