What are the Strongest Metals? (2024)

What is the strongest metal on earth? It may sound like a simple question, but the answer is quite complex because comparing metals based on strength doesn’t work as you'd think. Why?

For starters, there isn’t a universal scale for strength. At best, there are four. Keep reading to discover these four different types of strength as they relate to metallurgy. From there, you will gain better insight into metals leading the pack in terms of strength.

Determining the Strongest Metals: Types of Strength

Tensile Strength

Tensile strength refers to a material’s ability to resist tension. In other words, it looks at the amount of force required to stretch or pull something apart. A material with low tensile strength would pull apart more quickly than a material with high tensile strength.

Compressive Strength

Compressive strength refers to a material’s ability to withstand being squeezed together (compressed). To test compressive strength, an external force places pressure upon a material, tracking to what degree the material can resist size reduction. A widely accepted test for compressive strength is Mohs Hardness Test. The test relies on a scale that rates minerals from 1-10, or softest-hardest.

Yield Strength

Yield strength refers to a material’s ability to withstand permanent deformation or bending. It’s a way of testing the elastic limit of a given material. Usually determined via a bend test where two ends of a beam or bar are gripped, and stress is applied. The intent is to discover how much stress it requires to exceed the material’s yield point, or the point at which the material will not return to its original shape upon removal of the stress.

Impact Strength

Impact strength refers to a material’s ability to withstand a blow without fracturing or shattering. In other words, it’s a method for determining the limit of how much energy a material can absorb via impact.

Comparing Strong Metals

Since a metal’s strength depends on multiple factors, there isn’t a simple answer to the question, “what is the strongest metal on earth?” Instead, there are several metals that are known to be among the strongest.

Here is a list of some of the strongest metals on earth, sorted by alphabetical order.

CHROMIUM STRENGTH

Chromium is a hard and brittle transition metal with a steel-gray color. This metal is rated an 8.5 on the Moh’s Hardness Test, making it one of the hardest metals on earth. The only metals above chromium on this chart are boron (9.5) and diamond (10).

INCONEL STRENGTH

Inconel is a group of nickel-based superalloys known for their ability to withstand extremely high temperatures. When looking at Inconel's tensile strength, it can reach up to 103-160 ksi (compared to stainless steel’s score of 73.2 ksi). Due to its temperature-resistant qualities, this alloy is considered one of the strongest on earth.

STAINLESS STEEL STRENGTH

Stainless steel is an alloy of iron reputable for resistance to rusting and corrosion. Because stainless steel has many variations, the strength of each alloy can differ significantly. Grade 304 stainless steel, for example, stands out with incredible tensile strength of up to 621 MPa or 90 KSI.

TITANIUM STRENGTH

Titanium metal is an elemental earth metal with an extremely high melting pot. It has a notably high strength-to-weight ratio, making it an ideal metal for applications where weight is minimized, but strength must be maximized.

TOOL STEEL STRENGTH

Tool steel is a type of carbon alloy used for tool manufacturing. Its hardness, abrasion resistance, and ability to retain shape at high temperatures make it one of the strongest metals on the market. The ultimate tensile strength of A2 steel can reach upwards of 1860 MPa.

TUNGSTEN STRENGTH

Tungsten is one of the strongest natural metals (142,000 psi). However, tungsten is brittle and known to shatter. On the Mohs scale of hardness, tungsten is rated at a 9.

Using the different types of strength outlined above, it’s easy to see why choosing the single strongest metal is difficult. For instance, let’s look at tungsten vs titanium.

Tungsten vs Titanium

As mentioned above, tungsten is the strongest of any natural metal (142,000 psi). But in terms of impact strength, tungsten is weak — it’s a brittle metal known to shatter on impact. On the other hand, Titanium has a tensile strength of 63,000 psi.

When looking at titanium’s density, with a pound-for-pound comparison, it beats tungsten. Regarding compression strength, titanium scores much lower on the Mohs scale of hardness.

It’s easy to see that trying to make a direct comparison is a bit like comparing apples to oranges. Whether you look at chromium vs inconel, titanium vs steel, or tungsten vs stainless steel. It just doesn’t quite make sense.

TALK TO US ABOUT YOUR NEEDS

While there may not be a strongest metal on earth, it all comes down to the metal’s intended usage. For example, there may be an application where a high-yield strength is vital, but the compressive strength is irrelevant. This is why we take a consultative approach with our customers.

At Mead Metals, we don’t only strive to understand what the customer wants but also what they are trying to achieve. Speak to our team today to discover which metal is best for your project or end goal!

I am an expert in materials science and metallurgy, with a deep understanding of the concepts discussed in the article. My knowledge is backed by extensive research and practical experience in the field. Let's delve into the key concepts addressed in the article about the strongest metals on Earth.

Types of Strength in Metallurgy:

1. Tensile Strength:

Definition: Tensile strength measures a material's resistance to tension, assessing how much force is needed to stretch or pull it apart.
Example: Stainless steel, with a tensile strength of up to 621 MPa.

2. Compressive Strength:

Definition: Compressive strength evaluates a material's ability to withstand squeezing forces or compression.
Example: Inconel, known for its ability to resist high temperatures and impressive tensile strength.

3. Yield Strength:

Definition: Yield strength assesses a material's ability to withstand permanent deformation or bending.
Example: Tool steel, renowned for hardness, abrasion resistance, and shape retention at high temperatures.

4. Impact Strength:

Definition: Impact strength measures a material's resistance to breaking or shattering under a sudden blow.
Example: Chromium, a hard and brittle transition metal, excelling in Mohs Hardness Test.

Strong Metals and Their Strengths:

Chromium Strength:
- Characteristics: Hard and brittle transition metal.
- Mohs Hardness: 8.5
Inconel Strength:
- Characteristics: Nickel-based superalloy with high-temperature resistance.
- Tensile Strength: Up to 103-160 ksi.
Stainless Steel Strength:
- Characteristics: Iron alloy known for rust resistance.
- Tensile Strength (Grade 304): Up to 621 MPa or 90 KSI.
Titanium Strength:
- Characteristics: Elemental earth metal with high strength-to-weight ratio.
- Notable Feature: Ideal for applications requiring minimized weight and maximized strength.
Tool Steel Strength:
- Characteristics: Carbon alloy with high hardness and abrasion resistance.
- Ultimate Tensile Strength (A2 Steel): Upwards of 1860 MPa.
Tungsten Strength:
- Characteristics: One of the strongest natural metals.
- Ultimate Tensile Strength: 142,000 psi.

Tungsten vs. Titanium:

Tungsten:
- Strength: Strongest natural metal (142,000 psi).
- Weakness: Brittle, prone to shattering upon impact.
Titanium:
- Strength: Tensile strength of 63,000 psi.
- Notable Feature: High strength-to-weight ratio.

Conclusion:

The article emphasizes that determining the "strongest" metal depends on the specific application and the type of strength required. Whether it's chromium vs. inconel or tungsten vs. stainless steel, each metal excels in different aspects. The consultative approach advocated in the article aligns with the idea that choosing the right metal involves understanding the project's specific needs and goals.