Chromium (Cr) | Korea Tungsten Co., Ltd.

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Chromium

Chromium forms a dense oxide film on its surface, giving outstanding corrosion resistance, and it is a silvery-white metal with the highest hardness of any pure metal. It is an essential alloying element in stainless steel and superalloys, and is used as a sputtering target and surface treatment material.

51.996

1907Melting point °C

7.19Density g/cm³

93Thermal conductivity W/m·K

4.9Thermal expansion µm/m·K

INTRODUCTION

Chromium

Its surface oxide film is hard and blocks corrosion and wear together. It is the base material for coating, electrode and surface treatment parts.

Pure Cr 99.9%

INTRODUCTION

Chromium

Its surface oxide film is hard and blocks corrosion and wear together. It is the base material for coating, electrode and surface treatment parts.

Pure Cr 99.9%

WHY CHROMIUM

The metal that protects the surface

01

A self-healing oxide film

A thin, dense Cr₂O₃ layer blocks corrosion and re-forms when damaged.

02

High hardness makes it strong against wear

Applied as a coating layer it extends the life of contact and friction surfaces.

03

93 W/m·K thermal conductivity

Heat leaves well for a refractory metal, so it is also used in electrodes and heat dissipation parts.

KEY PROPERTIES

Key Properties

1907 °C

Melting point

Mid-to-high temperature range

7.19

Density g/cm³

Close to steel

Thermal conductivity W/m·K

Upper-middle

4.9

Thermal expansion µm/m·K

Relatively low

Air

Corrosion environment

Self-protecting through an oxide film

1 grade

Supply grade

Pure Cr 99.9%

Figures are representative values. The thermal expansion coefficient is taken from published literature and needs review before release; actual delivery specifications follow the per-lot test report.

WHY CHROMIUM

The metal that protects the surface

01

A self-healing oxide film

A thin, dense Cr₂O₃ layer blocks corrosion and re-forms when damaged.

02

High hardness makes it strong against wear

Applied as a coating layer it extends the life of contact and friction surfaces.

03

93 W/m·K thermal conductivity

Heat leaves well for a refractory metal, so it is also used in electrodes and heat dissipation parts.

KEY PROPERTIES

Key Properties

1907 °C

Melting point

Mid-to-high temperature range

7.19

Density g/cm³

Close to steel

Thermal conductivity W/m·K

Upper-middle

4.9

Thermal expansion µm/m·K

Relatively low

Air

Corrosion environment

Self-protecting through an oxide film

1 grade

Supply grade

Pure Cr 99.9%

Figures are representative values. The thermal expansion coefficient is taken from published literature and needs review before release; actual delivery specifications follow the per-lot test report.

WHY CHROMIUM

The metal that protects the surface

01

A self-healing oxide film

A thin, dense Cr₂O₃ layer blocks corrosion and re-forms when damaged.

02

High hardness makes it strong against wear

Applied as a coating layer it extends the life of contact and friction surfaces.

03

93 W/m·K thermal conductivity

Heat leaves well for a refractory metal, so it is also used in electrodes and heat dissipation parts.

KEY PROPERTIES

Key Properties

1907 °C

Melting point

Mid-to-high temperature range

7.19

Density g/cm³

Close to steel

Thermal conductivity W/m·K

Upper-middle

4.9

Thermal expansion µm/m·K

Relatively low

Air

Corrosion environment

Self-protecting through an oxide film

1 grade

Supply grade

Pure Cr 99.9%

Figures are representative values. The thermal expansion coefficient is taken from published literature and needs review before release; actual delivery specifications follow the per-lot test report.

Comparison

Corrosion-resistant metals compared

Properties

Iron

Nickel

Chromium

Mohs hardness

4.0 – 5.0

4.0

8.5 (the highest of any pure metal)

Melting point (°C)

1,538