Aluminium is the metal to watch: Alba, Qatalum and the UK ripple effect

Copper gets the headlines. Steel gets the political noise. But the metal that's actually moved hardest since the Iran war started is aluminium, and the second-order effects are only now working their way into UK yard prices. If you're not already repricing extrusion and cast grades upward, you're leaving margin on the table — and if you think this unwinds the moment Trump and Tehran agree terms, you're mispricing the curve.

Here's the case for why aluminium is the most interesting metal in a UK yard right now.

The supply shock is real, not a premium

Every commodity has moved since 28 February, but most of the moves are energy-driven premiums that will unwind when freight rates normalise. Aluminium is different. The Middle East accounts for roughly 8–9% of global primary aluminium production, and the region is heavily dependent on the Strait of Hormuz for both metal exports and imports of alumina and bauxite. When Hormuz closed, that dependency turned into a hard constraint within days.

The specific damage so far:

• Qatalum began a controlled shutdown after its energy supplier, QatarEnergy, stopped producing LNG. A primary aluminium smelter cannot run without continuous power. Once you shut a line down, restarting it is a multi-week, multi-million-dollar exercise — and in the worst case, if the pots freeze, some lines don't come back at all.
• Aluminium Bahrain (Alba) declared force majeure on export shipments because of the disruption to shipping through Hormuz. The smelter is still running, but the metal can't leave.
• Saudi Arabia's Maaden and UAE's EGA have options to truck material out by road to other ports, but the time and cost penalty is severe and it doesn't solve the raw material inbound problem.

Aluminium prices hit a four-year high as the scale of the disruption became clear, after Iranian strikes also damaged Middle East smelters. This is not a short-dated political premium. It's a supply curve that has physically moved to the left, and it will take months, not weeks, to move back.

Why this matters more for UK yards than copper does

For UK yards, a Middle East copper shock is an abstract thing. We don't buy much from the Gulf and our copper scrap is largely domestic or exported into European, Turkish and Asian trade flows. Copper on the LME has actually been drifting sideways — global stockpiles are near six-year highs and Goldman Sachs has already flagged downside risk if Hormuz stays closed because elevated energy costs would weigh on industrial demand.

Aluminium is different in two ways.

First, it's a primary-driven scrap market. Aluminium scrap pricing tracks primary LME aluminium more tightly than copper scrap tracks LME copper, because aluminium scrap competes directly with primary in remelt applications. When primary rips, scrap follows fast. When primary held six-year-high stockpiles, copper scrap prices didn't need to rally with LME; when primary aluminium hits a four-year high because of a physical supply shock, scrap aluminium has to move with it.

Second, Europe is the swing customer for Middle East aluminium. The Gulf has been a major supplier of primary aluminium into Europe, the US, and Asia outside China. With that flow interrupted, European buyers are being forced back into domestic remelt and scrap markets to cover their physical positions. UK extrusion plants, UK die-casters, and European remelters are all in the same pool — and they're all bidding for the same skip of old window frames that used to sit on your yard floor waiting for a quiet market.

What this means at the weighbridge

Three practical implications for your pricing desk over the next fortnight.

Extruded aluminium is the grade to watch. Old window frames, conservatory profiles, shopfit scrap — the material that normally moves at a steady clip to UK and continental remelters is suddenly in harder demand. If your collection rate for extruded hasn't moved in the last three weeks, it's stale. Look at what your nearest remelter is offering and work backwards to a collection rate that still leaves your margin intact, but don't assume January's numbers are a fair starting point.

Cast aluminium has lagged but will catch up. Engine blocks, cylinder heads, cookware, garden furniture — cast tends to lag extrusion in a fast market because the discount to extruded widens first and narrows second. If you're buying cast on collection, this is a grade where you can afford to be patient on rate cards, but be ready for demand to show up in the second and third week of this move rather than the first.

Old sheet and UBCs (used beverage cans) are a stickier story. The economics of sheet and UBCs depend as much on shredder capacity, baling logistics, and export flow to Turkey as they do on LME. Turkey CFR scrap assessments have already moved from around $375 per tonne in January–February to just under $400 earlier this week, and if Turkish mills extend their scrap buying into non-ferrous categories — which they historically do when billet imports are tight — UBC and old sheet prices have room to move in the second half of April.

The downside scenario

The honest version of the argument has to include the downside case. Three things could unwind the aluminium rally faster than expected.

One: a genuine ceasefire with enforceable safe passage. The 7 April two-week ceasefire is not that — tanker traffic has barely recovered and Iran is reportedly demanding cryptocurrency tolls — but a more durable deal is theoretically possible. If ships move at pre-war volumes for two consecutive weeks, the premium compresses fast.

Two: Chinese aluminium filling the gap. China has significant spare primary capacity and has historically been willing to push exports into European markets when Middle East flows tighten. If Beijing opens the tap, European aluminium prices soften even with Gulf smelters down.

Three: demand destruction. If energy costs stay elevated and European manufacturing slows further, aluminium demand from autos, construction, and packaging falls. Goldman has flagged exactly this mechanism for copper. It's a slower unwind than a ceasefire — quarters, not weeks — but it's the one that matters for structural pricing.

None of these is the base case for April. They're all plausible by Q3.

The position to be in

For yards with storage and working capital, the sensible play is to buy tonnage at the current market without chasing spikes, hold back a portion of high-quality extruded through the ceasefire noise, and ship UBCs and old sheet on normal rotation. Don't build inventory you can't fund if prices pull back 8–10% on a genuine ceasefire announcement — but don't starve your customers either, because the yards that kept their collection rates steady through this window will be the ones still getting the phone call in July when everybody else is scrambling.

We'll be watching Alba force majeure status, Qatalum restart announcements, and Turkey CFR scrap assessments as the three cleanest signals for whether this rally extends or rolls over. All three will be in next Tuesday's Weekly Melt, alongside the full UK price table and a longer piece on the Chinese aluminium question.

For the latest UK yard averages and regional breakdown, see our aluminium prices page. For the broader market context, the Hormuz ceasefire piece covers the political and freight side of the same story.

What are you seeing on the weighbridge this week — particularly on extruded? Drop us a line. We'd like to build a composite regional picture for next week's edition.