The Naming of Steels Constituent Elements

The fascinating stories behind the elements that give steel its properties

Steel is one of the most widely used materials in engineering, but what makes one grade different from another? Much of the answer lies in its chemistry.

Carbon, manganese, silicon, chromium, nickel and molybdenum are just some of the elements that influence how steel performs. But beyond their technical properties, many have fascinating histories and surprisingly unusual names.

At West Yorkshire Steel, we know that the right material matters. So, let’s take a closer look at some of the elements behind the steel we use every day.

Carbon — the element that changed steel

Carbon is arguably the most influential ingredient in steel. Even relatively small changes in carbon content can have a significant effect on hardness, strength, ductility and weldability.

Its name comes from the Latin carbo, meaning charcoal. Carbon has been known since ancient times in forms such as charcoal, soot and diamond, but scientists gradually established that these seemingly different materials contained the same element.

It’s a reminder that one of the most important ingredients in modern engineering has roots in something as familiar as a piece of charcoal.

Silicon — from flint to steel

The name silicon has a connection to silex, the Latin word for flint, a hard stone used by early humans to make tools.

Swedish chemist Jöns Jacob Berzelius is credited with isolating relatively pure silicon in 1824.

In steelmaking, silicon is commonly used as a deoxidising agent, helping remove unwanted oxygen from molten steel. Depending on the grade and quantity present, it can also influence strength and other properties.

From prehistoric flint tools to modern engineering materials, silicon has come a long way.

Manganese — a mineral with a history

Manganese was isolated as a metal by Swedish chemist Johan Gottlieb Gahn in 1774. Before that, its mineral compounds had been known for centuries.

Today, manganese is an important ingredient in most steels. It helps improve hardenability and, during steelmaking, helps counteract the harmful effects of sulphur.

It may not have the most memorable name, but manganese plays a vital role in producing steel with the properties engineers need.

Sulphur and phosphorus — small amounts, big consequences

Sulphur has been known since ancient times and even appears in historical texts under the name brimstone.

In steel, however, sulphur needs careful control. It can make steel more brittle, although in certain grades it is deliberately added to improve machinability.

Phosphorus has an equally interesting history. German alchemist Hennig Brand discovered it in 1669 while experimenting with urine in his search for the philosopher’s stone.

Its name comes from Greek words meaning “light-bearer”, reflecting its ability to glow under certain conditions.

In steel, phosphorus can increase strength and hardness, but excessive amounts can reduce toughness. Like sulphur, its effect depends on the grade and the quantities involved.

Nickel — the tale of Old Nick

Nickel’s name has a rather unusual origin. It is linked to the German term Kupfernickel, meaning something like “Old Nick’s copper”.

Miners used the name for a copper-coloured ore that failed to yield the copper they expected. The name reflected the belief that something mischievous was at work!

Swedish chemist Axel Fredrik Cronstedt identified nickel as a distinct metal in 1751.

Today, nickel is used in many alloy steels to help improve toughness and other mechanical properties. It is also an important ingredient in many stainless steels.

Chromium — a name full of colour

Chromium takes its name from the Greek word chroma, meaning colour. French chemist Nicolas-Louis Vauquelin identified the element in 1797–1798 while investigating a strikingly coloured mineral.

Chromium is particularly important in stainless steel. At sufficient concentrations, it helps form a thin, protective oxide layer on the surface, giving the material its corrosion resistance.

It’s a good example of how an element’s history can be just as interesting as its practical application.

Molybdenum — mistaken for lead

Molybdenum has one of the more unusual names in the periodic table. It derives from the Greek word molybdos, meaning lead, because minerals containing molybdenum were historically confused with lead ores.

The Swedish chemist Carl Wilhelm Scheele recognised molybdenum as a distinct element in 1778, and the metal was isolated a few years later.

In alloy steels, molybdenum can improve hardenability, strength at elevated temperatures and resistance to certain forms of wear and corrosion, depending on the grade.

Every element has a part to play

From carbon’s connection to charcoal to nickel’s association with Old Nick, the elements in steel have stories stretching back centuries.

But their importance goes far beyond their names. The proportions of these elements, together with the steelmaking process and any subsequent heat treatment, help determine the properties of the finished material.

Take a look at our elements in steel page for more information to learn more about how they affect the properties of steel.