# Steel: Characteristics

How a dash of carbon and alloys sets strength

Source page: https://www.materialinsights.org/commodities/steel/characteristics/

What this tab covers The supply and physical characteristics of the commodity. Supply: current production, inventories and stocks, capacity utilisation, geographic and producer concentration, how fast supply responds to price, the project pipeline and capital spending, and logistics and export flows. Material: the physical and chemical properties that set its grade, price and end uses (for example purity and conductivity for metals, API gravity, sulfur and energy content for fuels, moisture, protein and fibre quality for crops).

#### Supply volume characteristics

| Characteristic | Figure | What it means | Source |
|---|---|---|---|
| **Current production volume** | about 1.90 Bt raw steel and 1.30 Bt pig iron (2025e) | China made 980 Mt, India 160 Mt, the US 82 Mt and Japan 81 Mt of raw steel. Chinese output fell from 1,010 Mt in 2024 while India grew about 7%. | USGS MCS 2026 |
| **Inventory and stock levels** | US service centre stocks 6.7 Mt (end-2025), about 26 days of US apparent consumption | Steel is stocked by mills, service centres and traders rather than exchanges. China's mill and social inventories of rebar and coil are tracked weekly by Mysteel. The real long-run stock is steel in use, about 2.7 t per person worldwide in 2005 against 0.4 t in India. | USGS MCS 2026 (6.7 Mt / 95 Mt apparent consumption, derived); Smil 2016 |
| **Capacity utilisation** | about 74-78% globally (2025); India 76% (FY2025); US about 78% | OECD puts 2025 world capacity at a record 2.45 Bt with 640 Mt of excess capacity, more than half of it in China, and expects the excess to grow to 2028. India made 152.2 Mt of crude steel from 200 Mt of capacity in FY2025. The US made 82 Mt from about 105 Mt of capacity. | OECD Steel Outlook 2026 via Eurometal (Mar 2026); Ministry of Steel; USGS MCS 2026 |
| **Geographic and producer concentration** | China about 52%, top-3 about 64% (China, India, US), HHI about 2,800 (2025, derived); top-5 companies about 18% (2024) | Country concentration is high because of China, but company concentration is low: China Baowu 130 Mt, ArcelorMittal 65 Mt, Ansteel 60 Mt, Nippon Steel 44 Mt and POSCO 38 Mt together made about 336 Mt of 1,880 Mt in 2024. | USGS MCS 2026 (HHI derived from country shares); worldsteel top producers 2024 via content_v2 |
| **Supply elasticity** | high short-run via utilisation; low long-run (3-5 years to build an integrated plant) | Mills can raise output within weeks by running idle capacity, which is why prices swing more than volumes. Blast furnaces are costly to stop and restart, so integrated mills keep running into losses. Scrap-based EAF minimills can be built in 2-3 years and switched on and off more easily. | content_v2 supercycle; lead times indicative |
| **Project pipeline and CapEx** | capacity still rising to 2028 (OECD); India targets 300 Mt by 2030-31 | India and Southeast Asia lead additions, the latter backed by Chinese investment (OECD 2026). In the US a 450,000 t a year rebar minimill began construction in California in 2025, and Nippon Steel's takeover of US Steel came with about $11 billion of investment through 2028. | OECD Steel Outlook 2026 via Eurometal; National Steel Policy 2017; USGS MCS 2026 |
| **Logistics and export flows** | semi-finished steel exports $19.2 billion and pig iron $3.7 billion (2024); China exported 131 Mt of steel in 2025 | About a quarter of steel crosses borders, mostly as finished products. Brazil (20.1%) and China (15.5%) lead semi-finished exports; Turkey (15.8%) and the US (9.0%) lead imports. Tariffs (US 50% from June 2025) and 75 trade cases opened in 2025 redirect flows more than physical chokepoints do. | UN Comtrade 2024 (HS 7207, 7201); OECD via Eurometal (Mar 2026); USGS MCS 2026; traded share indicative |

#### Material characteristics Metal / hard commodity

Steel is iron with up to about 2% carbon plus small, deliberate amounts of manganese, chromium, nickel, molybdenum, vanadium and niobium. Commercial grades are defined by strength, ductility, weldability and corrosion resistance, which come from chemistry and processing. Buyers specify a standard grade, and price premiums follow strength, coating and surface quality.

| Property | Value / specification | Why it matters | Source |
|---|---|---|---|
| **Composition (carbon and alloys)** | structural steels about 0.1-0.25% C; rebar IS 1786 Fe 500D C at most 0.25%, S+P at most 0.075%; stainless at least 10.5% Cr | Carbon and alloy content set strength, weldability and corrosion resistance and therefore which standard and price a product meets | IS 1786:2008; EN 10088-1 |
| **Yield and tensile strength** | IS 1786 Fe 500D: yield at least 500 MPa, tensile at least 565 MPa; EN 10025 S355: yield 355 MPa, tensile 470-630 MPa | Design codes size beams and bars on yield strength; higher grades save tonnage per building or car | IS 1786:2008; EN 10025-2 |
| **Ductility (elongation)** | Fe 500D at least 16% elongation; deep-drawing auto steels above 35% (indicative) | Ductile rebar bends without breaking in earthquakes, which is why 'D' grades carry a premium in India; auto panels need high formability | IS 1786:2008; indicative for auto grades |
| **Hardness** | mild steel about 120-180 HB; quenched tool and wear steels 500-700 HB (indicative) | Sets wear resistance for rails, mining equipment and tools, and the machining cost of parts | ASM Handbook (indicative) |
| **Stiffness and density** | elastic modulus about 200-210 GPa; density 7.85 g/cm3 | High stiffness per unit cost is why steel dominates structures; density is why carmakers move to thinner high-strength grades | EN 1993 (Eurocode 3) design values |
| **Thermal and electrical conductivity** | carbon steel about 50 W/m K; electrical steel with about 3% Si has high resistivity to cut core losses | Grain-oriented electrical steel for transformers is a premium product; the US stockpile planned to buy 3,200 t of it in FY2025 | Eurocode 3; USGS MCS 2026 |
| **Corrosion resistance and coating** | galvanised coating Z275 = 275 g/m2 zinc (both sides); stainless 304 has 18-20% Cr, 8-10.5% Ni | Coated and stainless products sell at large premiums for roofing, autos, appliances and process plant | EN 10346; EN 10088-2 |

## Other sections

- [Summary](https://www.materialinsights.org/commodities/steel/index.md)
- [Overview](https://www.materialinsights.org/commodities/steel/overview/index.md)
- [Correlation](https://www.materialinsights.org/commodities/steel/correlation/index.md)
- [Extraction](https://www.materialinsights.org/commodities/steel/extraction/index.md)
- [Production](https://www.materialinsights.org/commodities/steel/production/index.md)
- [Stocks](https://www.materialinsights.org/commodities/steel/stocks/index.md)
- [Cycles](https://www.materialinsights.org/commodities/steel/cycles/index.md)
- [Trading](https://www.materialinsights.org/commodities/steel/trading/index.md)
- [Movement](https://www.materialinsights.org/commodities/steel/movement/index.md)
- [Criticality](https://www.materialinsights.org/commodities/steel/criticality/index.md)
- [Emissions](https://www.materialinsights.org/commodities/steel/emissions/index.md)
- [Relationships](https://www.materialinsights.org/commodities/steel/links/index.md)