Market Data

When Iron Ore Moves, When Do You Lock Steel? A Procurement Timing Guide

A moving ore price feeds into steel quotes with a lag. Here is how to use the iron ore lead time to decide when to fix contracts, pad quotes, or wait, before the change reaches your mill invoice.

Because iron ore moves into finished-steel prices with a lag of roughly one to three months, a buyer watching the benchmark, now $104/tonne as of Jun 2026, climbing and up about 7.9% from a year ago, has a decision window most steel buyers never use: the interval between the ore market moving and the mill quote catching up. Used well, that window is worth real margin; ignored, it becomes the surcharge letter that arrives after you have already quoted your customers.

Why the lag exists, and how long you really get

Mills do not reprice sheet and bar the day ore ticks up. They buy ore on index-linked contracts that settle monthly or quarterly, carry several weeks of raw-material inventory, and face their own competitive pressure on list prices. The result is a pass-through lag of roughly one to three months between a sustained ore move and its arrival in transaction prices for finished steel, shorter when mill order books are full and mills have pricing power, longer when demand is soft and mills eat the increase to hold volume. The word doing the work is "sustained": a two-week ore spike that reverses never reaches your invoice, which is why the trigger for action should be the monthly benchmark trend, like the series charted above, rather than daily headlines.

Iron ore (62% Fe, CFR China), Jun 2026 (IMF via FRED): $104/tonne. Archived range: $96 in Jun 2025 to $112 in May 2026. Sustained moves within this band reach mill quotes in one to three months.

The decision rules

Three rules cover most situations. When the ore benchmark has risen materially over one to two consecutive months and your steel is still quoted at old levels, accelerate: pull forward planned buys, extend contract coverage, and fix prices on booked work before the mill reset. When ore has fallen the same way, delay what you can and resist locking long, the discount is coming to you, and mills will concede it faster to buyers who visibly track the index. When ore is flat or churning, buy to schedule and spend your effort on the contract structure instead: index-linked steel pricing with a collar, or quarterly resets, so that neither side is betting the relationship on a commodity call. In every case, quote your own customers with validity windows shorter than the pass-through lag, a 90-day fixed steel quote written mid-move is a gift to whoever receives it.

The ore-to-steel lag is the only free lead time in metals buying. Most shops read about it in the surcharge letter instead.

What one passed-through move costs

Size the stakes with the standard conversion of roughly 1.6 tonnes of ore per tonne of blast-furnace steel. At today's $104/tonne, a 10% ore move shifts the raw-material cost inside each steel tonne by about $17. For a shop buying 200 tonnes a quarter, full pass-through of that move is roughly $3,321 per quarter, the amount at stake in whether you act during the lag or after it. Set a standing rule: when the monthly benchmark moves beyond an agreed band, procurement reviews steel coverage that week, not at the next quarterly business review.

Run your recent steel buys through the purchase price variance calculator to see what the pass-through lag has been costing, or saving, you. Check your timing

Published 2026-07-13.