Melting Points Of Metal: The Ultimate Guide

Before sheet metal fabrication, you should understand the melting points of metals.

It will help you choose the right sheet metal fabrication tools, and techniques.

So, let’s look at some of the fundamental aspects of melting points of metal.

What Is The Melting Temperature Of Metals?

This is the temperature at which the metal substance starts transforming from its solid state to the liquid form.

Metal With Highest Melting Point

Metal Tungsten, with the highest melting point of 3695K.

Properties:

Tungsten has the atomic number 74.

The melting point of 3,422 ◦C

The boiling point of 5,555 ◦C

An atomic mass of 183.84 u

Metal With Highest Melting Point
Metal With Lowest Melting Point

Metal With Lowest Melting Point

Metal Mercury has the lowest melting point of -38.83 ◦C

Properties:

Has a boiling point of 356.7 ◦C

An atomic number of 80

Metal Mercury has a symbol of Mg.

Importance Of Knowing Melting Point Of Metal

Importance Of Knowing Melting Point Of Metal
Importance Of Knowing Melting Point Of Metal

Offers Knowledge On Choosing Right Metal Alloy For a Project

Understanding the specific melting points of metals enables the appropriate choice of metal alloys for projects. Proper choices of metal alloys for applications prevent challenges such as; a component failure which may lead to expensive repairs.


Allow For Right Metal To Undergo Proper Manufacturing Process

Metals tend to undergo different manufacturing processes such as – metal casting, smelting and fusion welding. All these processes require the metals to transform to their suitable form


To Prevent Component Failure.

Different metals have different melting points. Consider choosing a metal that does not liquefy before the maximum temperature range for its application in order to prevent loss.


Metals Are Mostly Formable In Their Liquid State

When undertaking any manufacturing process involving the melting of metals, knowing the melting point enables the choice of appropriate equipment materials.


Helps In Choosing Metals Requiring High Temperatures

There needs to be a proper evaluation of the different temperature ranges and points before use.

Factors Affecting Melting Points of Metals

Ionic bond

The ionic bond refers to the electrostatic force of attraction between a metal ion with a positive charge and a non-metal ion with a negative charge.

Metals form positive ions when they lose electrons hence gaining more stability. Metals with ionic bonds have higher melting points in comparison to those with covalent bonding.

Size Of Molecule

Considering on the composition of the sizes of molecules within a metal;

Metals with small molecules have a lower melting point, while metals with large molecules have a higher melting point.

Shape Of  The Molecule

Molecular symmetry has a direct impact on the melting properties of organic compounds. Symmetrical molecules that are in crystalline nature/form usually have higher melting temperatures.

They also have lower solubility properties. Molecules belonging to a similar structure that is not in symmetrical shape have lower melting points.

Intermolecular Forces Within The Metals

Metals existing in their solid form tend to have a higher melting point. The metals containing strong intermolecular forces between the existing atoms have higher melting points.

Electrostatic forces of attraction between ions and the free electrons existing within a metal substance create strong metallic bonds. The strong metallic bonds result in high melting points.

Effect Of Pressure On Melting Point

Metals like lead expand in size when passing through heat during the melting process.

The melting point of such metals do increase when there is an increase in pressure.

Number Of Electrons In Atoms Of A Metal

Metals have atoms that consist of electrons. The higher the number of atoms, the more the metallic bond within the metal substance becomes strong.

When the metallic bond is so strong, it results in a higher melting point. There are metals in the periodic table in which their melting point decreases when the sizes of the atoms increase.

Metallic Bonds Within The Metals

Metals with strong metallic bond have high melting points.

Besides, the atomic structure of a metal defines its level of metallic bond. A metal requires a lot of heat to transform it from its physical form.

Density Of The Metal

Metals vary in their densities. Normally, the metals with higher densities have very strong molecular and chemical bonding. Thus they require much heat to break the attraction force between their electrons.

Majority of the metals exist as giant lattice structures which contain delocalized electrons. They have high densities; hence require large number electrostatic forces to break the electrons bond. Breaking the bonding between such metal elements require much heat. Hence high melting points.

Electro Negativity Force

Electro negativity defines the nature of hoe hard atomic nucleus pull on the electrons within its orbit. Metals with stronger electro negativity tend to pull the existing electrons close to itself by the positive nucleus attracting the negative electrons.

Thus metal elements with high electro negativity require minimal heat in breaking their bonds, thus low melting point.

More Resources:

Melting Points

Knowing Metals Melting Points

Metals Melting Point

At KDMFAB we will help you choose the best metal for your project – contact us now.

Scroll to Top