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Introduction to different types of molybdenum wire

Jan 11,2026

Introduction to different types of molybdenum wire

The performance of molybdenum wire is rooted in the properties of molybdenum metal itself:

High melting point:Up to 2620℃,one of the highest melting points among common metals.

Excellent strength and hardness:Especially at high temperatures,its strength and creep resistance far exceed most metals(i.e.,good“high-temperature strength”).

Good thermal and electrical conductivity:Electrical conductivity is approximately 30%of copper,and it has good thermal conductivity.

Low thermal expansion coefficient:Small dimensional changes when heated,resulting in high stability.

Corrosion resistance:Good resistance to various acids,alkalis,and molten glass.

Good wear resistance:High surface hardness and low coefficient of friction.

Main Types

According to composition,process,and application,it is mainly divided into the following categories:

1.Pure Molybdenum Wire:

Composition:Molybdenum content is usually above 99.95%.

Characteristics:Has good high-temperature performance and conductivity,but is relatively brittle and has average ductility.

Uses:Electrical discharge machining,filaments,supports,heating elements,etc.

2.High-Temperature Molybdenum Wire(Lanthanum Molybdenum Wire/Rare Earth Molybdenum Wire):

Composition:Trace amounts of lanthanum oxide(La₂O₃)or other rare earth oxides are added to molybdenum.

Characteristics:This is the most important improved variety.After adding rare earth elements,the recrystallization temperature is significantly increased(up to over 1800℃),the anti-sagging ability is extremely strong,and it can maintain a fibrous structure at high temperatures,greatly improving high-temperature ductility and toughness,resulting in a longer service life.

Uses:High-performance light sources(such as halogen lamps,automotive HID lamps),high-temperature furnace heating elements,sapphire crystal growth furnace thermal field components,and other demanding high-temperature applications.

3.Wire Cutting Molybdenum Wire:

Composition:Mainly pure molybdenum wire or specially treated molybdenum wire.

Characteristics:Extremely high requirements for straightness,surface finish,tensile strength,and diameter uniformity.Modern fast-wire EDM machines commonly use molybdenum wire with a diameter of 0.1-0.2 mm.

Uses:Electrical discharge wire cutting for shaping molds and precision parts.

4.Sprayed Molybdenum Wire:

Uses:Through thermal spraying technology,molten molybdenum wire is sprayed onto the surface of a workpiece to form a wear-resistant and corrosion-resistant coating.It is commonly used for repairing engine crankshafts and other components.

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