China's own iron ore mines produced 63.11 million tons in September, 23.9% less than a year earlier, according to National Bureau of Statistics figures reported by SteelOrbis. Output for the first nine months fell 10.3% to 665.45 million tons, and the decline is getting steeper: through August it had been 1.5 percentage points smaller.

Steelmakers have not cut back nearly as hard. Crude steel output in September was 73.59 million tons, up 0.1% from a year earlier, the statistics bureau said on Oct. 20. The gap between flat steel production and shrinking domestic ore is being filled by ships, which matters directly for miners in Australia and Brazil, for dry bulk shipowners, and for the producers in Guinea now trying to win a share of the world's largest ore market.

Imports hold up while China's mines retreat

China brought in 955 million tons of iron ore from January through September, up 4.1% from a year earlier, according to customs data reported by Mysteel. September arrivals were 109.82 million tons. That was 5.6% below the same month of 2025, but up 1.2% from August and the second straight monthly increase.

The shift has been building all year. In the first half, Chinese iron ore mining fell 7% while net imports rose 6%, according to BIMCO, the shipping association. BIMCO estimated that net imports covered 57% of China's ore supply in that period, up from 50% in the first half of 2022, with Australia and Brazil together supplying 83% of the imported tonnage. Chinese imports of Australian ore rose 4% and of Brazilian ore 6%, it said.

The steel side of the picture is soft but not collapsing. Pig iron output, the step that actually consumes ore, was 65.34 million tons in September, down 1.4%, and 628.44 million tons over nine months, down 3%, according to the bureau's release. Crude steel for the year to date was 724.77 million tons, down 2.9%. Rolled steel output fell 3.8% in September to 118.17 million tons, and cement, a gauge of construction demand, was down 5.3%. Value added in ferrous metal smelting grew 1.6% in September, against 5.5% for industry as a whole.

Ore piles up at the ports

With imports steady and mills cautious, inventory has accumulated. Imported ore held at 47 major Chinese ports reached 173.7 million tons on Oct. 15, up 15% from a year earlier and the fifth straight weekly increase, according to a Mysteel survey. Arrivals at the sampled ports in the week to Oct. 11 were 25.6 million tons.

Analysts at Signal Ocean had already flagged the buildup in August, when port stocks of about 174 million tons in late July stood more than 22% above a year earlier. They wrote that flows to China in July rose 2% from a year earlier even as Chinese crude steel output ran 3% behind 2025.

Prices have eased. Imported ore peaked at $102.8 a ton on Sept. 8 and slipped to $95 by Sept. 29, according to SteelOrbis. In China's own wholesale market, the bureau's survey of prices for Oct. 11 to 20 showed coking coal down 9.6% from late September at 2,232.1 yuan a ton and metallurgical coke down 9.5% at 1,896.4 yuan. Rebar edged up 0.4% to 3,187.8 yuan a ton, while hot-rolled sheet fell 0.9% to 3,268.1 yuan. Lower coking coal costs follow a period when China's coal output fell and prices climbed ahead of winter.

What it means for miners and shippers

For exporters, the trend is mixed. A smaller Chinese mining base supports demand for imported tonnage even with steel output flat, which supports volumes for the big Australian and Brazilian exporters. But high port inventories give Chinese buyers room to slow purchases if prices rise, and new supply is arriving. BIMCO expected Guinea's Simandou project to export about 20 million tons in 2026, with potential output of about 120 million tons by the end of the decade. Signal Ocean counted Simandou exports at 1.8 million tons in July.

Shipowners have been the clearest winners. BIMCO said dry bulk demand from Chinese ore shipments rose 9% in the first half and that the Capesize T4 index was up 79% from a year earlier.

The next readings come from China's customs agency, which publishes October import volumes in its monthly trade release, and from the statistics bureau's October industrial output report in mid-November. Analysts will check whether domestic mining keeps falling at a 20%-plus pace and whether the port stockpile tops its late-July level of about 174 million tons.