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Iron vs. Steel — What's the Difference?

Edited by Tayyaba Rehman — By Fiza Rafique — Updated on September 26, 2023
Iron is a pure metallic element, while steel is an alloy made primarily of iron combined with carbon and sometimes other elements.
Iron vs. Steel — What's the Difference?

Difference Between Iron and Steel

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Key Differences

Iron and Steel are both essential materials in various industries, especially construction and manufacturing. Iron is a pure element found on the periodic table, represented by the symbol "Fe." It's a lustrous, ductile, and malleable metal that can rust when exposed to moist air. Being a natural element, Iron is extracted directly from iron ore through a process called smelting.
Steel, in contrast, is not a pure element but an alloy. It consists mainly of iron, but its distinctive properties come from the addition of carbon. Depending on the amount and type of carbon and other elements added, steel can have varying strengths, flexibilities, and resistances to corrosion. This versatility is what makes steel a preferred choice in many applications, from building skyscrapers to manufacturing tools.
While both Iron and Steel are metals, their properties can differ considerably due to their composition. Iron, being pure, has a set of consistent properties. Steel's properties, however, can be tailored by adjusting its carbon content and adding other alloying elements. For instance, adding chromium to steel produces stainless steel, which is highly resistant to rust.
Another significant difference between Iron and Steel lies in their applications. While Iron has been used for millennia for various purposes, its susceptibility to corrosion limits some of its uses in modern times. Steel, with its enhanced properties, is more widely used in today's world. From infrastructure to automobiles, the robustness and adaptability of steel make it a favorite in the modern industrial world.

Comparison Chart

Composition

Pure element.
Alloy of iron and carbon, often with other elements.
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Corrosion Resistance

Can rust easily.
Varies; some types (e.g., stainless steel) are highly resistant.

Applications

Used historically in tools, weapons, etc.
Widely used in buildings, tools, vehicles, etc.

Strength

Consistent but can be brittle.
Can vary; generally stronger than pure iron.

Compare with Definitions

Iron

A metallic element with the symbol "Fe."
The core of the Earth is believed to be primarily made of iron.

Steel

An alloy that can be tailored for specific properties.
The firm ordered a specific type of steel for the project.

Iron

A lustrous, ductile metal susceptible to rust.
Ancient civilizations made weapons out of iron.

Steel

An emblem of strength or resolve.
She had nerves of steel during the crisis.

Iron

A device heated to press clothes.
She plugged in the iron to press her shirt.

Steel

Steel is an alloy made up of iron with typically a few tenths of a percent of carbon to improve its strength and fracture resistance compared to iron. Many other elements may be present or added.

Iron

Iron () is a chemical element with symbol Fe (from Latin: ferrum) and atomic number 26. It is a metal that belongs to the first transition series and group 8 of the periodic table.

Steel

A hard, strong grey or bluish-grey alloy of iron with carbon and usually other elements, used as a structural and fabricating material
Steel girders

Iron

Symbol Fe A silvery-white, lustrous, malleable, ductile, magnetic or magnetizable, metallic element occurring abundantly in combined forms, notably in hematite, limonite, magnetite, and taconite, and used alloyed in a wide range of important structural materials. Atomic number 26; atomic weight 55.845; melting point 1,538°C; boiling point 2,861°C; specific gravity 7.874 (at 20°C); valence 2, 3, 4, 6. See Periodic Table.

Steel

Mentally prepare (oneself) to do or face something difficult
His team were steeling themselves for disappointment
She steeled herself to remain calm

Iron

An implement made of iron alloy or similar metal, especially a bar heated for use in branding, curling hair, or cauterizing.

Steel

A generally hard, strong, durable, malleable alloy of iron and carbon, usually containing between 0.2 and 1.5 percent carbon, often with other constituents such as manganese, chromium, nickel, molybdenum, copper, tungsten, cobalt, or silicon, depending on the desired alloy properties, and widely used as a structural material.

Iron

Great hardness or strength; firmness
A will of iron.

Steel

Something, such as a sword, that is made of steel.

Iron

(Sports) Any of a series of golf clubs having a bladelike metal head and numbered from one to nine in order of increasing loft.

Steel

A quality suggestive of this alloy, especially a hard, unflinching character.

Iron

A metal appliance with a handle and a weighted flat bottom, used when heated to press wrinkles from fabric.

Steel

Steel gray.

Iron

A harpoon.

Steel

Made with, relating to, or consisting of steel
Steel beams.
The steel industry.
A bicycle with a steel frame.

Iron

Irons Fetters; shackles.

Steel

Very firm or strong
A steel grip.

Iron

A tonic, pill, or other medication containing iron and taken as a dietary supplement.

Steel

Of a steel gray.

Iron

Made of or containing iron
Iron bars.
An iron alloy.

Steel

To cover, plate, edge, or point with steel.

Iron

Strong, healthy, and capable of great endurance
An iron constitution.

Steel

To make hard, strong, or obdurate; strengthen
He steeled himself for disappointment.

Iron

Inflexible; unyielding
Iron resolve.

Steel

An artificial metal produced from iron, harder and more elastic than elemental iron; used figuratively as a symbol of hardness.

Iron

Holding tightly; very firm
Has an iron grip.

Steel

(countable) Any item made of this metal, particularly including:

Iron

To press and smooth with a heated iron
Iron clothes.

Steel

Bladed or pointed weapons, as swords, javelins, daggers.

Iron

To remove (creases) by pressing.

Steel

A piece used for striking sparks from flint.

Iron

To put into irons; fetter.

Steel

Armor.

Iron

To fit or clad with iron.

Steel

A honing steel, a tool used to sharpen or hone metal blades.

Iron

To iron clothes.

Steel

(sewing) Pieces used to strengthen, support, or expand an item of clothing.

Iron

(uncountable) A common, inexpensive metal, silvery grey when untarnished, that rusts, is attracted by magnets, and is used in making steel.

Steel

(dialectal) A flat iron.

Iron

A metallic chemical element having atomic number 26 and symbol Fe.

Steel

A sewing needle; a knitting needle; a sharp metal stylus.

Iron

Any material, not a steel, predominantly made of elemental iron.
Wrought iron, ductile iron, cast iron, pig iron, gray iron

Steel

(printing) An engraving plate:

Iron

(countable) A tool or appliance made of metal, which is heated and then used to transfer heat to something else; most often a thick piece of metal fitted with a handle and having a flat, roughly triangular bottom, which is heated and used to press wrinkles from clothing, and now usually containing an electrical heating apparatus.

Steel

Projectiles.

Iron

(usually plural, irons) shackles.

Steel

(sewing) A fringe of beads or decoration of this metal.

Iron

(slang) A firearm, either a long gun or a handgun.

Steel

A type of slide used while playing the steel guitar.

Iron

(uncountable) A dark shade of the color silver.

Steel

Medicinal consumption of this metal; chalybeate medicine; (eventually) any iron or iron-treated water consumed as a medical treatment.

Iron

A male homosexual.

Steel

(countable) Varieties of this metal.

Iron

(golf) A golf club used for middle-distance shots.

Steel

The gray hue of this metal; steel-gray, or steel blue.

Iron

Used as a symbol of great strength or toughness, or to signify a very strong or tough material.
A will of iron
He appeared easygoing, but inside he was pure iron.

Steel

(figurative) Extreme hardness or resilience.

Iron

(weightlifting) Weight used as resistance for the purpose of strength training.
He lifts iron on the weekends.

Steel

Made of steel.

Iron

A meteorite consisting primarily of metallic iron (mixed with a small amount of nickel), as opposed to one composed mainly of stony material.
Irons and stony irons can be much larger than stony meteorites and are much more visually striking, but make up only a few percent of all meteorites.

Steel

Similar to steel in color, strength, or the like; steely.

Iron

A safety curtain in a theatre.

Steel

(business) Of or belonging to the manufacture or trade in steel.

Iron

Dumb bombs, those without guidance systems.

Steel

Containing steel.

Iron

(not comparable) Made of the metal iron.

Steel

(printing) Engraved on steel.

Iron

(figuratively) Strong as of will, inflexible.
She had an iron will.
He held on with an iron grip.
An iron constitution
Iron men

Steel

(transitive) To edge, cover, or point with steel.

Iron

(transitive) To pass an iron over (clothing or some other item made of cloth) in order to remove creases.

Steel

(transitive) To harden or strengthen; to nerve or make obdurate; to fortify against.

Iron

To shackle with irons; to fetter or handcuff.

Steel

To back with steel.

Iron

(transitive) To furnish or arm with iron.
To iron a wagon

Steel

To treat a liquid with steel for medicinal purposes.

Iron

The most common and most useful metallic element, being of almost universal occurrence, usually in the form of an oxide (as hematite, magnetite, etc.), or a hydrous oxide (as limonite, turgite, etc.). It is reduced on an enormous scale in three principal forms; viz., cast iron, steel, and wrought iron. Iron usually appears dark brown, from oxidation or impurity, but when pure, or on a fresh surface, is a gray or white metal. It is easily oxidized (rusted) by moisture, and is attacked by many corrosive agents. Symbol Fe (Latin Ferrum). Atomic number 26, atomic weight 55.847. Specific gravity, pure iron, 7.86; cast iron, 7.1. In magnetic properties, it is superior to all other substances.

Steel

To press with a flat iron.

Iron

An instrument or utensil made of iron; - chiefly in composition; as, a flatiron, a smoothing iron, etc.
My young soldier, put up your iron.

Steel

To cause to resemble steel in appearance.

Iron

Fetters; chains; handcuffs; manacles.
Four of the sufferers were left to rot in irons.

Steel

(transitive) To steelify; to turn iron into steel.

Iron

Strength; power; firmness; inflexibility; as, to rule with a rod of iron.

Steel

(transitive) To electroplate an item, particularly an engraving plate, with a layer of iron.

Iron

An iron-headed club with a deep face, chiefly used in making approaches, lifting a ball over hazards, etc.

Steel

(transitive) To sharpen with a honing steel.

Iron

Of, or made of iron; consisting of iron; as, an iron bar, dust.

Steel

Coldbath Fields Prison in London, closed in 1877.

Iron

Resembling iron in color; as, iron blackness.

Steel

A variety of iron intermediate in composition and properties between wrought iron and cast iron (containing between one half of one per cent and one and a half per cent of carbon), and consisting of an alloy of iron with an iron carbide. Steel, unlike wrought iron, can be tempered, and retains magnetism. Its malleability decreases, and fusibility increases, with an increase in carbon.

Iron

Like iron in hardness, strength, impenetrability, power of endurance, insensibility, etc.;

Steel

An instrument or implement made of steel

Iron

Rude; hard; harsh; severe.
Iron years of wars and dangers.
Jove crushed the nations with an iron rod.

Steel

A weapon, as a sword, dagger, etc.
While doubting thus he stood,Received the steel bathed in his brother's blood.

Iron

Firm; robust; enduring; as, an iron constitution.

Steel

Fig.: Anything of extreme hardness; that which is characterized by sternness or rigor.

Iron

Inflexible; unrelenting; as, an iron will.

Steel

An instrument of steel (usually a round rod) for sharpening knives.

Iron

Not to be broken; holding or binding fast; tenacious.

Steel

A chalybeate medicine.

Iron

To smooth with an instrument of iron; especially, to smooth, as cloth, with a heated flatiron; - sometimes used with out.

Steel

A piece of steel for striking sparks from flint.

Iron

To shackle with irons; to fetter or handcuff.

Steel

To overlay, point, or edge with steel; as, to steel a razor; to steel an ax.

Iron

To furnish or arm with iron; as, to iron a wagon.

Steel

To make hard or strong; hence, to make insensible or obdurate.
Lies well steeled with weighty arguments.
O God of battles! steel my soldiers' hearts.
Why will you fight against so sweet a passion,And steel your heart to such a world of charms?

Iron

A heavy ductile magnetic metallic element; is silver-white in pure form but readily rusts; used in construction and tools and armament; plays a role in the transport of oxygen by the blood

Steel

To cause to resemble steel, as in smoothness, polish, or other qualities.
These waters, steeledBy breezeless air to smoothest polish.

Iron

A golf club that has a relatively narrow metal head

Steel

To cover, as an electrotype plate, with a thin layer of iron by electrolysis. The iron thus deposited is very hard, like steel.

Iron

Metal shackles; for hands or legs

Steel

An alloy of iron with small amounts of carbon; widely used in construction; mechanical properties can be varied over a wide range

Iron

Implement used to brand live stock

Steel

A cutting or thrusting weapon with a long blade

Iron

Home appliance consisting of a flat metal base that is heated and used to smooth cloth

Steel

Knife sharpener consisting of a ridged steel rod

Iron

Press and smooth with a heated iron;
Press your shirts

Steel

Get ready for something difficult or unpleasant

Iron

Extremely robust;
An iron constitution

Steel

Cover, plate, or edge with steel

Iron

A magnetic metal used in various industries.
The blacksmith forged the iron into a beautiful ornamental piece.

Steel

An alloy made predominantly of iron and carbon.
The bridge was constructed using high-strength steel.

Iron

An essential nutrient for human health.
Spinach is a good source of dietary iron.

Steel

A metal known for its strength and versatility.
The cutlery was made of stainless steel, ensuring durability.

Steel

A widely used material in modern construction.
Skyscrapers often use steel frameworks due to their strength.

Common Curiosities

What is Iron?

Iron is a pure metallic element, symbolized as "Fe" on the periodic table.

Why is Steel often preferred over Iron in construction?

Steel's strength and adaptability, achieved through alloying, often make it more suitable than pure iron.

Are there health benefits associated with Iron?

Yes, iron is an essential mineral in the human diet, crucial for blood production.

Was Iron used in ancient times?

Yes, iron has been used for millennia for tools, weapons, and other purposes.

Is pure Iron strong?

Iron has consistent strength, but it can be brittle compared to many types of steel.

Why is Steel used in car manufacturing?

Steel is durable, malleable, and can be tailored for strength, making it ideal for vehicle frames and parts.

Can Steel's properties be altered?

Yes, adding different elements to steel can change its strength, flexibility, and corrosion resistance.

What distinguishes Steel from Iron?

Steel is an alloy primarily composed of iron and carbon, whereas iron is a pure element.

Is rusting a common property of both Iron and Steel?

Iron rusts easily, while certain types of steel, like stainless steel, have high rust resistance.

What is stainless steel?

It's a type of steel alloyed with chromium, known for its corrosion resistance.

How is Steel produced?

Steel is produced by mixing iron with carbon and sometimes other elements in controlled amounts.

Why is rusting an issue with Iron?

Rusting, or oxidation, occurs when iron reacts with oxygen and moisture, leading to corrosion.

Are Iron and Steel magnetic?

Both iron and most forms of steel are magnetic, though some steel alloys are non-magnetic.

Are Iron and Steel recyclable?

Both iron and steel are highly recyclable and are often melted down and reused.

Can Iron be found naturally?

Yes, iron is extracted from iron ore, which is mined from the Earth's crust.

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Author Spotlight

Written by
Fiza Rafique
Fiza Rafique is a skilled content writer at AskDifference.com, where she meticulously refines and enhances written pieces. Drawing from her vast editorial expertise, Fiza ensures clarity, accuracy, and precision in every article. Passionate about language, she continually seeks to elevate the quality of content for readers worldwide.
Tayyaba Rehman is a distinguished writer, currently serving as a primary contributor to askdifference.com. As a researcher in semantics and etymology, Tayyaba's passion for the complexity of languages and their distinctions has found a perfect home on the platform. Tayyaba delves into the intricacies of language, distinguishing between commonly confused words and phrases, thereby providing clarity for readers worldwide.

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