Hormuz Strait Closure: Full Impact Assessment on India’s Steel Industry — Costs, Supply Chains & Downstream Risk

The Strait of Hormuz — the 33-km-wide chokepoint between Iran and Oman through which roughly 20% of global oil and a significant share of LPG and propane transit daily — has been effectively closed since February 28, 2026. Two weeks in, the disruption has moved well beyond oil prices. It is now reaching into energy supply chains, industrial gas availability, and downstream steel processing in ways that most initial assessments failed to anticipate.

This analysis covers every major cost channel: crude oil, ocean freight, raw material routing, industrial gas supply, and the emerging threat to India’s coated and value-added steel segment.

Crude Oil: The First-Order Shock

Brent crude has moved from approximately $70 per barrel in late February to over $92 as of March 14 — a 31.4% increase in under three weeks. This is the steepest sustained oil rally since the Russia-Ukraine war spike of 2022.

For the Indian steel industry, the oil-to-cost transmission works through multiple parallel channels:

Direct energy consumption: A typical BF-BOF integrated mill in India consumes 5.5–6.5 Gcal of energy per tonne of crude steel. At current prices, we estimate this adds ₹1,200–1,800 per MT to production costs versus pre-crisis levels. EAF and induction furnace (IF) producers, more dependent on electricity, see a somewhat lower but still material ₹800–1,200 per MT increase.

Electricity tariffs: States where power generation depends heavily on fossil fuels — Maharashtra, Tamil Nadu, Gujarat — are likely to see industrial tariff adjustments within 30–60 days if crude stays above $85. Some open-access consumers are already paying 8–12% more on power exchanges.

Inland logistics: Diesel prices directly affect the ₹300–500 per MT cost of transporting finished steel from mills to distribution hubs. With diesel up roughly ₹4–5 per litre since February, road freight quotes from Jamshedpur to Delhi have risen approximately 6%.

Petrochemical inputs: Lubricants, coolants, and coating materials used across steel processing are all petroleum-derived. These costs are slower to move but will compound over the next 30–45 days.

Ocean Freight: Beyond the Headline 38%

The widely reported 38% spike in freight rates from the Persian Gulf to western India understates the actual cost to importers. Here’s the full picture:

Route economics: Jebel Ali (UAE) to Mumbai via the Strait of Hormuz is approximately 1,200 nautical miles — a 3–4 day voyage. Rerouting via the Cape of Good Hope extends this to roughly 8,500 nautical miles and 20–25 days. That is a 7x increase in sailing distance.

Direct freight cost: For a 50,000 MT Supramax bulk carrier, the additional fuel consumption and charter days add $8–15 per MT, depending on current charter rates and bunker prices (which themselves are elevated due to crude oil).

War risk insurance: Premiums for vessels transiting anywhere near the Gulf of Oman have jumped from near-zero to 0.3–0.5% of cargo value. On a $500/MT steel cargo, that’s $1.50–$2.50 per MT.

Working capital cost: The often-overlooked financial cost of material sitting at sea for 17–21 extra days. At India’s typical trade finance rate of 10–12% per annum, 20 additional days on a $500/MT cargo costs approximately $2.75–3.30 per MT in interest alone.

Container availability: The longer voyages are tying up vessel capacity, creating a secondary squeeze on container availability. Container repositioning costs from Indian ports have risen 15–20% since late February.

When you sum direct freight, insurance, financing, and container surcharges, the all-in additional landed cost for Gulf-origin imports is closer to $15–25 per MT — or approximately ₹1,300–2,100 at current exchange rates.

Industrial Gas Supply: The Underestimated Crisis

This is the dimension most market commentary has missed entirely. The Hormuz closure does not only disrupt crude oil — it disrupts the flow of liquefied petroleum gas (LPG) and propane, industrial gases that are critical to downstream steel processing.

Approximately 30–35% of India’s LPG imports and a significant share of industrial-grade propane originate from West Asian suppliers, primarily Qatar, Saudi Arabia, and the UAE. These cargoes transit the Strait of Hormuz. With the strait closed, three problems have emerged simultaneously:

1. Delayed and diverted cargoes: Propane and LPG tankers that would normally reach Indian ports in 4–6 days from Gulf terminals are now either stuck, rerouted via the Cape (adding 18–22 days), or not sailing at all due to insurance constraints. This has created an estimated 2–3 week supply gap for industrial-grade propane at Indian ports.

2. Global price spike: Saudi Aramco’s Contract Price (CP) for propane — the benchmark for Asian markets — has risen sharply. Spot propane in the Far East has moved from approximately $580/MT in February to over $680/MT, a 17% jump. Indian industrial buyers, who typically purchase on spot or short-term contracts, are bearing the full impact.

3. Allocation competition: With domestic LPG demand for cooking and heating being a political priority, industrial users face the risk of being deprioritized in allocation decisions. Oil marketing companies (IOCs) may redirect available propane stocks toward household LPG cylinders, further squeezing industrial supply.

Coated Steel Production: Galvanizing Lines Under Threat

The propane supply disruption creates a specific and severe risk for India’s coated steel segment — galvanized steel, galvalume, and colour-coated products.

Why propane matters to galvanizing: In continuous hot-dip galvanizing (HDG) lines, propane-fired burners maintain the zinc bath at a precise 450–460°C. Stable, uniform heating is essential because:

— Temperature fluctuations of even 5–10°C affect zinc coating adhesion and uniformity
— Rapid thermal cycling can damage the ceramic pot lining, requiring costly repairs
— Inconsistent heating leads to coating defects that compromise corrosion resistance — the entire value proposition of galvanized steel

India’s installed galvanizing and colour-coating capacity has expanded significantly in recent years. Major producers — including JSW Steel Coated Products, Tata Steel Colors, ArcelorMittal Nippon Steel India (AM/NS), and Jindal Stainless — operate large-scale HDG and colour-coating lines. Industry sources indicate that some facilities have already experienced disruptions due to reduced availability of industrial gases.

Scale of the risk: India’s coated flat steel production is estimated at 12–14 million MT per annum, supporting critical sectors:

— Construction and roofing: Galvanized and colour-coated roofing sheets account for a substantial share of India’s roofing market, particularly in tier-2/3 cities and rural housing
— Infrastructure: Highway guardrails, transmission towers, and solar mounting structures all require galvanized steel
— Renewable energy: Solar module frames and wind turbine components use galvanized and galvalume substrates
— Automotive: OEMs use galvannealed steel for body panels requiring corrosion resistance
— Appliances: Refrigerators, washing machines, and air conditioner housings use pre-painted galvanized steel

A sustained propane shortage that forces galvanizing line slowdowns or shutdowns would create supply shortages in all these downstream sectors within 3–4 weeks, given the limited buffer stocks that distributors typically carry.

Raw Material Routes: A Mixed Picture

Not all of India’s steel raw material supply chains are equally affected:

Coking coal (Australia → India): India imports 55–60 million MT of coking coal annually, with 70–75% sourced from Australia. This route transits the Indian Ocean and is entirely unaffected by Hormuz. However, general freight market tightness has pushed rates on this route up by 5–8%, adding approximately $2–4 per MT.

Coking coal (Mozambique → India): India’s second-largest source. The Mozambique Channel route is also unaffected. Supplies continue normally.

Coking coal (US East Coast → India): US coal shipments transit the Atlantic and Suez Canal or Cape route to reach India. While not directly affected by Hormuz, the general disruption to global shipping capacity has increased transit times by 2–3 days and costs by $3–5 per MT.

Steel scrap (UAE, Saudi Arabia → India): Severely impacted. India imports approximately 6–8 million MT of steel scrap annually, with a meaningful share from Gulf ports. Scrap shipments through Hormuz are either halted or being rerouted at substantial additional cost. Domestic scrap prices have already risen ₹1,500–2,000 per MT as EAF and IF producers compete for limited local supply.

Iron ore: India is largely self-sufficient (production of 260–280 million MT per year) and is a net exporter. Direct impact is minimal. Iran’s roughly 3% share of global seaborne iron ore is now disrupted, which marginally tightens the global market but has negligible effect on Indian producers.

Mill Response: Price Hikes and Production Adjustments

Indian steel mills have responded aggressively:

— Three consecutive price hike rounds since March 1, totalling approximately ₹2,100 per MT on HRC base prices across major producers (JSW, Tata, SAIL, AM/NS)
— TMT bar prices have been revised upward by ₹1,000–1,500 per MT, with further increases expected as scrap costs feed through
— Galvanized product premiums are being widened by ₹500–800 per MT over base HR/CR prices, reflecting the propane cost pass-through and anticipated supply tightening
— Some mills are reportedly adjusting product mix away from galvanized products toward non-coated flat and long products to manage the propane constraint

The rupee’s weakening against the dollar (it has depreciated approximately 1.5% since the crisis began) is compounding all dollar-denominated input costs, adding a further ₹300–500 per MT across the board.

Actionable Strategy by Stakeholder

Steel traders and stockholders: The price trajectory remains upward across all product segments. With oil above $90, freight elevated, and industrial gas supply constrained, there are multiple simultaneous cost drivers that have not yet fully transmitted into market prices. Inventory holders should evaluate their position carefully — the full cost pass-through is likely still 2–3 weeks away.

Purchase managers and project procurement teams: Evaluate locking in rates on fixed-price contracts for March–April delivery where available. For coated steel specifically, secure supply commitments now — if galvanizing line shutdowns materialise, lead times could extend by 3–4 weeks and spot premiums could spike. Use SteelMath’s Landed Cost Calculator to compare domestic vs. import economics at current freight and duty levels.

Plant engineers and fabricators: Revise BOQs and project estimates to reflect a 3–7% material cost increase depending on product mix. For projects with significant galvanized steel content (warehouses, PEB structures, solar installations), the increase could be higher. Build in contingency.

Coated steel producers: Evaluate multi-fuel capability of your galvanizing and colour-coating lines. Lines that can switch between propane, natural gas (PNG via pipeline), and LPG have a significant operational advantage. Companies with city gas distribution (CGD) access via GAIL or other pipeline operators should maximise PNG usage to reduce propane dependence. Investigate pre-procurement of propane stocks for 30–45 day buffer.

What Could Change the Outlook

Escalation scenario: Any further military action — tanker incidents, mine deployment, or expanded naval blockades — would push crude above $100 and could completely halt Gulf-origin propane supply for an extended period. This would force galvanizing line shutdowns at multiple facilities within 2–3 weeks.

Resolution scenario: Even a diplomatic resolution would take 4–8 weeks to normalise freight rates and insurance premiums. Propane supply chains, which operate on tighter inventory cycles than crude oil, could take 6–10 weeks to fully recover. Mill price hikes already announced will not be reversed.

Policy intervention: The Indian government could accelerate relief by temporarily reducing import duties on propane and LPG for industrial use, prioritising industrial gas allocation alongside household needs, and expediting gas pipeline connectivity to large industrial clusters. Industry bodies have already made representations seeking such interventions.

The Hormuz crisis is a stress test for India’s steel value chain — not just on the primary production side, but across the entire downstream ecosystem. The propane-to-galvanizing vulnerability, in particular, exposes how deeply India’s steel industry depends on imported energy inputs at every stage of the value chain, from blast furnace to finished coated product.

SteelMath will continue tracking all cost channels and updating our calculators with the latest data as the situation evolves.

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