CBSE Class 10 · Manufacturing Industries

Iron and Steel Industry Class 10: Raw Materials, Location and Map

Updated 14 October 2026 · Fact-checked

The iron and steel industry is the basic industry because all other industries depend on it for machinery. It is a heavy industry: iron ore, coking coal and limestone are needed in roughly a 4:2:1 ratio, plus some manganese. Most plants are on the Chhotanagpur plateau, which offers cheap, high-grade raw materials nearby, cheap labour and a growing home market.

Flow chart: ore enters a blast furnace, giving cast iron and slag, then routes to castings, wrought iron and steel by different processes. — Notice that iron ore first goes through the blast furnace, and the cast iron it produces is then converted into wrought iron or steel.
Picture: AnonymousUnknown author · Public domain · Wikimedia Commons

Understand Iron and Steel Industry

Mineral-based industries. Industries that use minerals and metals as raw materials are called mineral-based industries. The iron and steel industry is the most important of them.

Why it is the 'basic industry'. All other industries, heavy, medium and light, depend on it for their machinery. Steel is needed for a wide range of engineering goods, construction material, defence, medical, telephonic and scientific equipment, and many consumer goods. The production and consumption of steel is often regarded as an index of a country's development.

Why it is a 'heavy industry'. All its raw materials and finished goods are heavy and bulky, so transport costs are high.

Raw materials.

Iron ore, coking coal and limestone in the ratio of approximately 4 : 2 : 1.
Some manganese is needed to harden the steel.
So a plant needs large, cheap supplies of all three raw materials close together, and an efficient transport network to send finished products to markets and consumers.

Where should steel plants be located? NCERT asks this question directly. Because the inputs are bulky and needed in large quantities, a plant is best located where the raw materials are close at hand, transport is efficient, and labour and markets are available. The finished products also need an efficient transport network for distribution.

The Chhotanagpur plateau. This region has the maximum concentration of iron and steel industries because of its relative advantages:
1. Low cost of iron ore;
2. High-grade raw materials in proximity (iron ore, coal and other inputs close together);
3. Cheap labour;
4. Vast growth potential in the home market.
NCERT's activity asks you to superimpose maps of iron ore, manganese, coal and the iron and steel industry; you will see the plants clustering where iron ore and coal deposits lie near each other.

Link with minerals. Iron ore belts (Odisha-Jharkhand, Durg-Bastar-Chandrapur, Ballari belt) and the Gondwana coalfields of the Damodar valley explain the steel plants' locations. Coal is bulky and loses weight as it becomes ash, so heavy industries sit on or near coalfields.

Map work (2026-27): locate and label the iron and steel plants. Durgapur (West Bengal), Bokaro (Jharkhand), Jamshedpur (Jharkhand), Bhilai (Chhattisgarh), Vijayanagar (Karnataka) and Salem (Tamil Nadu), as on NCERT's map 'India: Iron and Steel Plants'.

Scope note. Some older paragraphs on steel production figures and Table 6.1 were dropped by NCERT and are not in the 2026-27 syllabus, so avoid statistics that are not in the current book.

Iron and Steel Industry: key facts

Basic industry: All other industries (heavy, medium, light) depend on it for machinery; Steel used in engineering, construction, defence, medical, telephonic, scientific and consumer goods.
Index of development: Production and consumption of steel
Heavy industry: Raw materials and finished goods heavy and bulky -> high transport cost
Raw material ratio: Iron ore : coking coal : limestone ≈ 4 : 2 : 1, plus some manganese to harden steel; Learn the materials in this order.
Chhotanagpur advantages: Low-cost iron ore + high-grade raw materials nearby + cheap labour + vast home-market potential; Maximum concentration of plants.
Map: steel plants: Durgapur (WB), Bokaro (Jharkhand), Jamshedpur (Jharkhand), Bhilai (Chhattisgarh), Vijayanagar (Karnataka), Salem (TN); Locate and label.

How to answer Iron and Steel Industry questions

Questions ask why iron and steel is a basic or heavy industry, what raw materials it needs, why Chhotanagpur has most plants, or ask you to mark plants on the map.

1For 'basic industry', write the dependence of all other industries on it for machinery, and give uses of steel.
2For 'heavy industry', use 'heavy and bulky raw materials and finished goods, high transport cost'.
3Always state the 4:2:1 ratio in order: iron ore, coking coal, limestone; add manganese.
4For location, give the four Chhotanagpur advantages.
5For maps, locate plants by state: two in Jharkhand, one each in West Bengal, Chhattisgarh, Karnataka and Tamil Nadu.

Iron and Steel Industry in real life

The idea, met in an everyday situation. Answer the question in your own words, then compare with the model answer. The one-line hook is what to remember.

Choosing a steel plant site

Suppose a state government is choosing between two sites for a steel plant: Site A has iron ore and coal deposits within 100 km and a railway line; Site B is a coastal city 900 km from any iron ore or coal.

Using NCERT's reasoning, recommend a site and justify it.

Try it first, then show the solutionSolution

Steel is a heavy industry: raw materials are heavy and bulky.
It needs iron ore, coking coal and limestone in about 4:2:1 ratio.
Nearby raw materials cut transport costs; a railway carries finished goods.
Compare with Chhotanagpur's advantages.

Answer: Site A is better. Steel is a heavy industry whose bulky raw materials, iron ore, coking coal and limestone in about a 4:2:1 ratio, are costly to transport, so having them within 100 km saves money. The railway can carry finished steel to markets. This is why the Chhotanagpur plateau, with cheap, high-grade raw materials close together, has the most steel plants.

Memory hook: Build steel where the heavy stuff already lies.

Tricks to remember Iron and Steel Industry

Short memory aids. Say each one aloud once, then use it on a question the same day.

4-2-1 = Ore, Coal, Lime
Four of Ore, two of Coal, one of Lime: 'OCL 4-2-1'.
Use it when: Raw material ratio.
Chhotanagpur's 'L-H-C-H'
Low-cost ore, High-grade raw materials near, Cheap labour, Home market.
Use it when: Location advantages.
Six plants, five states
Jharkhand has two (Bokaro, Jamshedpur); Durgapur (WB), Bhilai (Chhattisgarh), Vijayanagar (Karnataka), Salem (TN).
Use it when: Map list.

Iron and Steel Industry: solved examples

Ordered from board level to HOTS. Try each one before you open the solution.

Example 1: Raw material ratio · 1 mark · MCQBoard level

Iron ore, coking coal and limestone are required in the iron and steel industry in the approximate ratio of:
(a) 1 : 2 : 4
(b) 4 : 2 : 1
(c) 2 : 4 : 1
(d) 4 : 1 : 2

Try it first, then show the solutionSolution

NCERT gives iron ore : coking coal : limestone as about 4 : 2 : 1 (1 mark).

Answer: (b) 4 : 2 : 1

Example 2: Basic industry (2 marks) · 2 marks · Very short answerBoard level

Why is the iron and steel industry called the basic industry? (2 marks)

Try it first, then show the solutionSolution

All other industries, heavy, medium and light, depend on it for their machinery (1 mark).
Steel is needed for engineering goods, construction material, defence, medical, telephonic and scientific equipment and consumer goods (1 mark).

Answer: All other industries, whether heavy, medium or light, depend on it for their machinery. Steel is also needed for engineering goods, construction, defence, medical, telephonic and scientific equipment, and many consumer goods.

Example 3: Assertion-reason: heavy industry · 1 mark · Assertion-reasonHarder board level

Assertion (A): Iron and steel is a heavy industry.
Reason (R): All its raw materials as well as finished goods are heavy and bulky, entailing heavy transportation costs.
(a) Both A and R are true, and R is the correct explanation of A.
(b) Both A and R are true, but R is not the correct explanation of A.
(c) A is true, but R is false.
(d) A is false, but R is true.

Try it first, then show the solutionSolution

NCERT gives R as the reason it is called a heavy industry (1 mark).

Answer: (a) Both A and R are true, and R is the correct explanation of A.

Example 4: Location on the Chhotanagpur plateau (5 marks) · 5 marks · Long answerHarder board level

'The Chhotanagpur plateau region has the maximum concentration of iron and steel industries.' Analyse the reasons, linking them to the industry's raw material needs. (5 marks)

Try it first, then show the solutionSolution

The industry is heavy: raw materials and products are bulky, so transport costs decide location (1 mark).
It needs iron ore, coking coal and limestone in about 4:2:1, plus manganese (1 mark).
Chhotanagpur offers low-cost iron ore and high-grade raw materials in proximity (1 mark).
It has cheap labour (1 mark).
It has vast growth potential in the home market, and finished goods need efficient transport to markets (1 mark).

Answer: Iron and steel is a heavy industry: its raw materials and finished goods are bulky, so transport costs largely decide where plants are built. Each plant needs iron ore, coking coal and limestone in about a 4:2:1 ratio, along with some manganese to harden the steel. The Chhotanagpur plateau suits these needs because iron ore there is low-cost, and high-grade raw materials lie close together, cutting transport costs. The region also has cheap labour. Finally, it has vast growth potential in the home market, and finished steel can be distributed through the transport network to consumers. Together these advantages explain why most plants are concentrated there.

Example 5: Case: steel and development · 4 marks · Case-basedHOTS / competency

Read the case and answer the questions.

Suppose two countries publish their yearly data. Country X produces and uses large amounts of steel for railways, buildings, machines, hospitals and household goods. Country Y uses very little steel and imports most of its machines. A geography teacher says one can guess which country is more developed just from this.

(i) What does NCERT regard as an index of a country's development in this context? (1)
(ii) Name any two sectors that need steel. (1)
(iii) Explain why the teacher's claim follows from steel being a 'basic industry'. (2)

Try it first, then show the solutionSolution

(i) The production and consumption of steel (1 mark).
(ii) Any two: engineering goods, construction, defence, medical, telephonic, scientific equipment, consumer goods (1 mark).
(iii) All other industries depend on steel for machinery, so high steel use shows many working industries (1 mark).
(iii) Construction, transport and services also use steel, so its use reflects overall economic activity; Country X is likely more developed (1 mark).

Answer: (i) The production and consumption of steel. (ii) Construction and defence (or engineering, medical, scientific equipment, consumer goods). (iii) Since all other industries depend on iron and steel for their machinery, and construction, transport, health and households also use steel, a country using lots of steel must have many active industries and much building. So Country X is likely the more developed one.

Example 6: Map: steel plants · 3 marks · Map workHarder board level

On an outline map of India, locate and label: (a) Bhilai, (b) Vijayanagar, (c) Durgapur iron and steel plants. (3 marks)

Try it first, then show the solutionSolution

(a) Bhilai: central Chhattisgarh; dot and label (1 mark).
(b) Vijayanagar: north-central Karnataka; dot and label (1 mark).
(c) Durgapur: western West Bengal, in the Damodar valley; dot and label (1 mark).

Answer: Bhilai (Chhattisgarh), Vijayanagar (Karnataka) and Durgapur (West Bengal), each dotted and labelled.

Where students lose marks in Iron and Steel Industry

The slips examiners see most often, and what to write instead.

Mistake: Writing the ratio in the wrong order
Numbers learnt without materials.
Wrong working
Limestone, coal and ore in the ratio 4:2:1.
Right working
Iron ore : coking coal : limestone = 4 : 2 : 1.
Do this: OCL 4-2-1.
Usually costs: 1 mark.
Mistake: Confusing 'basic' with 'heavy'
Both labels apply.
Wrong working
It is basic because its raw materials are heavy.
Right working
Basic: others depend on it for machinery. Heavy: bulky raw materials and products.
Do this: Keep two separate reasons.
Usually costs: 1 mark.
Mistake: Vague location answer
Only 'raw materials' written.
Wrong working
Chhotanagpur has raw materials.
Right working
Low-cost iron ore, high-grade raw materials nearby, cheap labour, home market.
Do this: Four points.
Usually costs: 2 marks.
Mistake: Mislocating plants
Several plants in eastern India.
Wrong working
Durgapur marked in Jharkhand.
Right working
Durgapur is in West Bengal; Bokaro and Jamshedpur are in Jharkhand.
Do this: Learn plant-state pairs.
Usually costs: 1 mark.

Exam tips

The six steel plants are in the 2026-27 map list: practise them with the iron ore and coal maps side by side.
Use 'basic' and 'heavy' with separate reasons in any definition answer.
State the 4:2:1 ratio with materials in order.
Geography has no 3-mark answers in 2026-27.

Practice questions on Iron and Steel Industry

Write each answer on paper first. Open the hint only if you are stuck, and the answer only when you have finished.

Q1 · 1 mark · MCQBoard level
Which mineral is added in small quantities to harden steel?
(a) Bauxite
(b) Mica
(c) Manganese
(d) Copper
Hint
Also needed about 10 kg per tonne of steel.
Answer
(c) Manganese
Q2 · 2 marks · Very short answerBoard level
What are mineral-based industries? Give one example. (2 marks)
Hint
Raw materials from minerals and metals.
Answer
Industries that use minerals and metals as raw materials are mineral-based industries. Example: the iron and steel industry (also aluminium smelting, cement).
Q3 · 2 marks · Very short answerHOTS / competency
Suppose a classmate says steel plants should be built near big cities where buyers live, not near mines. Evaluate this view. (2 marks)
Hint
Heavy raw materials vs finished goods.
Answer
Partly wrong. Raw materials (iron ore, coking coal, limestone in about 4:2:1) are heavy and bulky, so plants are cheaper to run near them, as in Chhotanagpur. But markets matter too, so finished steel needs efficient transport to consumers.
Q4 · 1 mark · MCQHarder board level
In which state are both Bokaro and Jamshedpur steel plants located?
(a) West Bengal
(b) Odisha
(c) Jharkhand
(d) Chhattisgarh
Hint
Chhotanagpur plateau.
Answer
(c) Jharkhand
Q5 · 5 marks · Long answerHarder board level
'Production and consumption of steel is often regarded as the index of a country's development.' Explain the statement, describing why iron and steel is both a basic and a heavy industry. (5 marks)
Hint
Uses, dependence of other industries, bulky inputs, location.
Answer
Iron and steel is a basic industry because all other industries, heavy, medium and light, depend on it for their machinery. Steel is also needed for engineering goods, construction material, defence, medical, telephonic and scientific equipment and consumer goods, so a country that makes and uses much steel has many active industries and much building; that is why steel is an index of development. It is also a heavy industry: its raw materials, iron ore, coking coal and limestone in about a 4:2:1 ratio with some manganese, and its products are heavy and bulky, causing high transport costs. So plants are located near raw materials, as on the Chhotanagpur plateau.
Q6 · 3 marks · Map workBoard level
On an outline map of India, locate and label Salem, Bokaro and Jamshedpur iron and steel plants. (3 marks)
Hint
Tamil Nadu; two in Jharkhand.
Answer
Salem (Tamil Nadu), Bokaro (Jharkhand) and Jamshedpur (south-east Jharkhand), each dotted and labelled.

Test your recall

Answer in your head or on paper first, then open the card. Pulling an answer out of memory makes it stick far better than re-reading.

1.Which region has the maximum concentration of steel plants?Show answer
The Chhotanagpur plateau.
2.What is added to harden steel?Show answer
Manganese.
3.Name the steel plant in Chhattisgarh in the map list.Show answer
Bhilai.
4.Name the steel plant in Karnataka in the map list.Show answer
Vijayanagar.
5.Why are steel transport costs high?Show answer
Raw materials and finished goods are heavy and bulky.

Iron and Steel Industry: frequently asked questions

Why is iron and steel called a basic industry?

Because all other industries depend on it for their machinery, and steel is needed for construction, defence, engineering and many other goods.

What raw materials does a steel plant need?

Iron ore, coking coal and limestone in about a 4:2:1 ratio, plus some manganese to harden the steel.

Why are most steel plants on the Chhotanagpur plateau?

Low-cost iron ore, high-grade raw materials close together, cheap labour and a large home market.

Which steel plants are in the 2026-27 map list?

Durgapur, Bokaro, Jamshedpur, Bhilai, Vijayanagar and Salem.