Is Kevlar Magnetic? 5 Facts You Should Know!

A Kevlar is a synthetic aromatic amide fiber used for several applications as it is heat-resistance. In this article, we shall discuss the magnetic behaviour of Kevlar.

Kevlar is not magnetic, and it shows any magnetic characteristic even in the presence of an external magnetic field. The chemical formula of Kevlar is C14H10N2O2. The carbon, hydrogen, and nitrogen are diamagnetic, and oxygen is paramagnetic; hence it does not show a response towards the magnetic field.

Kevlar is a strong matter used for a plane’s wings, for prevention of rupturing of race car tanks, conveyor belts, etc. We shall further try to understand the magnetic properties of Kevlar, its proficiency in heat resistance, whether it is stronger than steel, and its conductivity with detailed facts.

Kevlar Magnetic Properties

Kevlar is an organic yet hard fibre with good stiffness and resistance. Let us list some of Kevlar’s magnetic properties that make it unique from other synthetic fibres.

  • Kevlar does not allow magnetic flux through it.
  • All electrons in Kevlar matter are paired.
  • Kevlar has low thermal conductivity and good heat resistance.
  • The magnetization of Kevlar is zero.
  • The resultant magnetic moment of each atom in Kevlar is zero.
  • The magnetic field lines are diverted from Kevlar.

Is kevlar heat resistant?

The substances that can sustain high temperatures, fire and heat are heat resistance and thermo-tolerance. Let us ponder on the fact whether Kevlar is heat resistant or not.

Kevlar is heat resistant as it can resist fire and heat up to the temperature of 8000 F. The heat resistance quality of Kevlar is because its matter is crystalline and made up of polyamide. The amides are paired with para-phenylene making Kevlar tough and developing inherent heat resistance properties.

Is kevlar stronger than steel?

Kevlar is rigid, resistive to force and heat, with good stability and stiffness. Steel is ferromagnetic and ductile. Let us see whether Kevlar is stronger than steel or not.

Kevlar is stronger than steel because it has five times higher tensile strength than steel and is more sturdy than steel. Hydrogen and carbon form the strongest bond that makes Kevlar tough. Also, Kevlar is heat resistant and has no chance of melting, while steel allows the flow of heat energy through it.

Is kevlar conductive?

The conductivity of matter depends upon the total amount of heat flowing through conduction. Let us illuminate whether Kevlar can be conductive despite of heat-resistance.

Kevlar is not conductive because it does not transmit heat to flow through it, having a thermal conductivity of only 0.04 W/m.K as it resists heat. The heat capacity of Kevlar is 1420 J/gK, and its melting point is 477 0C. The density of Kevlar is 1440 kg/m3, which is very high to allow heat to flow through it.

Kevlar Gloves Image by Cjp24 (CC BY-SA 3.0) from Wikimedia Commons

Is kevlar a polymer?

Polymers are those substances made up of symmetric group molecular structures by combining monomers. Let us discuss whether Kevlar is a polymer or not.

A Kevlar is a polymer because it is fabricated by combining large unique dimensions macromolecules called monomers having high density. It is assembled by benzene polymerization, forming an inter-chain molecular bond to build a long-chain structure.


We can conclude from this article that Kevlar is not magnetic and does not show any response in the presence of an external magnetic field. It is a tough synthetic polymer with high resistivity to heat and fire; hence it is used as heat resistance in industries and aircraft.

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