What are The Non-Ferrous Metals?- A Full Guide

What are Non-Ferrous Metals?

Non-ferrous metals are alloys or metals that do not have any appreciable quantities of iron. All pure metals are non-ferrous elements except for iron (Fe), which is called ferrite, from the Latin ‘Ferrum’, which means “iron.”

Non-ferrous metals are often substantially more expensive than ferrous metals; however, they are utilized because of their properties, such as being lightweight (aluminum), high conductor (copper), nonmagnetic properties, or resistance to corrosion (zinc).

Some non-ferrous materials are used in the iron and steel industries. Bauxite, for example, becomes flux with iron for blast furnaces. Other non-ferrous metals such as chromite or pyrolusite, wolframite are used to create ferrous alloys. However, many non-ferrous metals are not suitable to high temperature because of low melting points.

There are a large number of non-ferrous materials, which include every metal and alloy regardless of whether they contain iron. Non-ferrous metals include a large number of metals for practical purposes, Aluminum, copper, lead, nickel, tin, titanium, zinc, and non-ferrous alloys, such as brass.

Precious metals, those such as gold, silver, and platinum, are also non-ferrous metals, along as exotic or rare metals, cobalt, mercury, tungsten, beryllium, bismuth, cerium, cadmium, niobium, indium, gallium, germanium, lithium, selenium, tantalum, tellurium, vanadium, zirconium. These metals are obtained in minerals, e.g. sulfides, carbonates, and silicates. Non-ferrous metals are typically refined by electrolysis.

The only difference between ferrous and non-ferrous metals is that ferrous metals have iron. Ferrous metals such as cast irons or carbon steel are those with a high carbon content; which render them very prone to rust when uptaken into moisture a particular is not true of wrought iron, wrought iron resists rust due to its purity, and stainless steel has chromium that makes it immune to corrosion.

Ancient History

Non-ferrous metals were the first metals engaged in metallurgy by mankind. Gold, silver, and copper appeared in their native crystalline yet metallic aspect. Although rare, there were enough quantities of rare metals to attract human activity.

Less susceptible to oxygen than many other metals, these metals can even be found in weathered outcroppings. Copper was the first metal forged, as it was soft enough to cold forge into many different shapes and could be melted in a crucible.

Because of these characteristics, gold, silver, and copper took on some of the functions that existed for other resources (wood and stone) in that they could be formed into a variety of shapes for a variety of uses.

There were not many artifacts made of gold, silver, or copper, and when there were, they were viewed as luxury items and therefore, treated as precious and handled with care.

The usage of copper was a sign of the transition from the Stone Age to the Copper Age. The Bronze Age, therefore, followed the Copper Age by the inventive process of the alloying of copper with the non-ferrous metal tin to invent bronze.

Recycling and pollution control

Non-ferrous scrap metals tend to get recycled, due to their higher useage. The secondary materials that are in scrap are important to metallurgy, since the production of the primary metals often requires them.

Some steel scrap recycling places will re-smelt and recast non-ferrous materials, with dross collected at the site, as well as fumes filtered and collected (if applicable to the materials).

Non-ferrous scrap metals are sourced from industrial scrap materials, particle emissions, and obsolete technology (e.g., scrap copper cords).

It is important to note that selling scrap can earn you money, but the amount you will get ultimately depends on the grade. Understanding copper scrap grades and other non-ferrous metal grades is essential before you show up with your possessions at the scrap yard.

Uses and Properties

Non-ferrous metals are used for a wide variety of commercial, industrial and residential applications. The applied use might involve careful material selection according to their mechanical properties, which also includes the material’s workability or ease to be shaped and whether those properties are impacted, depending on the work processes or features used.

Many characteristics of ferrous metals can be expressed in non-ferrous materials. For example, aluminum or titanium alloys can be employed as a substitute for steel, and substitutes for iron’s magnetic capabilities can be developed with alloyed cobalt, nickel and rare-earth elements.

But because non-ferrous metals are usually much more costly and less plentiful, their applications are typically considered for their unique properties, rather than an effort to replace steel.

Those unique properties of non-ferrous metals include lower densities, electrical and thermal conductivity, corrosion-resistance, and magnetic properties.

Non-ferrous metals also tend to be comparatively softer and more malleable than ferrous metals; therefore, in addition to potentially practical applications, they can provide aesthetic value, as with gold or silver.

The properties of non-ferrous metals include:

• Easy to fabricate (including machinability, casting, and welding)
• High corrosion resistance
• Good thermal and electrical conductivity
• Low density
• Non-magnetic
• Colorful

Common Non-Ferrous Metals and Alloys

Because they include any metal that doesn’t include iron, there are lots of different non-ferrous metals and alloys.

Important List of Non-Ferrous Metals include:

Here are some of the properties and common uses of some of the more common non-ferrous metals:

1. Copper

Copper has been used by humans for millennia, and is still widely embraced by industry. The use of copper alloys, brass (copper and zinc), and bronze (copper and tin) not only add to the uses of this valuable non-ferrous metal.

Copper and its alloys have a number of properties such as high thermal conductivity, high electrical conductivity, high corrosion resistance, and high ductility.

These properties have allowed copper and its alloys to be used for heat exchangers and heating vessels, as an electrical conductor used for wiring or motors, as roofing, plumbing fittings, and saucepans, and to make statues. Copper also oxidizes into green.

2. Aluminum

Aluminum is a significant metal, valued for its ease of machining and light weight. It is comparatively expensive, but as an alloyed metal, it’s the base for many.

Aluminum is both corrosion resistant and still a good conductor of heat and electricity (in lesser case than copper), as well as being ductile, malleable, and also rightly tends to need to be annealed as it becomes hard after it’s cold worked, among other things.

The lightweight properties afford it to be great for aerospace and automotive but also is used to make, sails of yachts, bicycle frames, saucepans, cans of drinks, etc.

3. Lead

Throughout the ages, Lead has been used for a variety of things, bullets, fuels, and even paint. Unfortunately, once released into the air it was discovered to be poisonous and the harm transferred to the application of many other uses as well.

Lead is the heaviest common metal, corrosion-resistant, soft and malleable. Also does not react with many chemicals.

Even though many of these uses are no longer allowed, lead is still widely used for batteries, power cables, and acid tanks.

4. Zinc

Zinc has been known to be an alloying element since antiquity, particular for purposes such as alloying steel for a variety of uses, and alloying with copper to produce brass.

Galvanizing items with alloying elements increases their resistance to rust, which is why it is used in items such as chain-link fencing, guardrails, bridges (suspension), lampposts, metal roofs, heat exchangers, and auto bodies.

Zinc also is used a sacrificial anode in cathodic protection (CP) and also as material for anodes in batteries. Zinc oxide is also used as a white pigment in paints and used for dispersing heat during the manufacture of rubber.

5. Silver

Silver has been employed as a precious metal for thousands of years. In either pure form or as a component of an alloy or other material, silver possesses higher electrical conductivity, thermal conductivity, and reflectivity by volume than any other metal. While silver is soft and malleable with heat, it is very resistant to corrosion at the atomic level.

Historically, silver has been in use not only for jewels and currency, but also in solar panels, for water filtration, in electric contacts and conductors, as well as for stained glass and even specialty confectionary.

6. Gold

Gold, another precious metal, has been utilized for jewelers and coinage. Gold is the most malleable of metals as well as ductile and will not corrode from exposure to a variety of chemicals and reactions.

As for electrical conductance, gold has been used with computer devices and used for infrared shielding, including in the production of colored glass, for gilding, and also for tooth restoration.

7. Titanium

Titanium was discovered in 1791, and provides excellent corrosion resistance as well as the highest strength-to-density ratio of any metallic element. As an unalloyed material, it is as strong as certain steels, but less dense.

It can be alloyed with other metals, such as iron, aluminum, and others, to produce strength-to-weight ratio alloys suitable for aerospace, automotive, agricultural, military, medical, and sporting uses, and is also used by jewelers and mobile phone manufacturers.

What’s The Difference Between Ferrous and Non-Ferrous Metal?

The quick answer is that ferrous metals contain iron and non-ferrous metals do not. The longer answer is that ferrous metals and non-ferrous metals have individual characteristics; these characteristics dictate what they are best for.

Non-ferrous metals have been around since the beginning of civilization. The discovery of copper in 5,000 BC ended the Stone Age as copper began the Copper Age. The invention of bronze (an alloyed metal of copper and tin) started the Bronze Age.

Ferrous metals began being utilized in and around 1,200 BC and iron production started gaining ground, which was the beginning of the Iron Age.

FAQs