VDM® Alloy 602 CA

Alternative and trade names
Nicrofer 6025 HT


VDM® Alloy 602 CA is a high-temperature material with excellent resistance to creep and oxidation up to 1200 °C. VDM® Alloy 602 CA is delivered in the solution annealed state with an oxidized or descaled surface.

Related Standards

Equivalent Materials



Density ρ

7.93 g/cm³ at 20 °C


Creep strength Rm,creep

215 MPa at 650 °C

Rm/10⁴ h measured in the solution annealed condition

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Elastic modulus E

215 GPa at 20 °C

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Elongation A

30 % at 20 °C

Typical mechanical properties in the solution annealed condition

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Impact strength, Charpy notched Ivnot

690 kJ/m² at 20 °C

Tensile strength Rm

675 MPa at 20 °C

Typical mechanical properties in the solution annealed condition

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Yield strength Rp0.2 Rp0.2

270 MPa at 20 °C

Typical mechanical properties in the solution annealed condition

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Coefficient of thermal expansion α

1.415E-5 1/K at 100 °C

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Melting point Tm

1340 - 1400 °C

Specific heat capacity cp

447 J/(kg·K) at 20 °C

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Thermal conductivity λ

10.4 W/(m·K) at 20 °C

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Electrical resistivity ρel

1.23E-6 Ω·m at 20 °C

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Relative magnetic permeability μrel

1.01 [-] at 20 °C

Chemical properties


Weight %






24 - 26 %


8 - 11 %


1.8 - 2.4 %


0.5 %



Technological properties

Application areas

VDM® Alloy 602 CA has a wide range of application in the high-temperature field of thermotechnical and chemical processes, in power plants and in the automotive industry. Typical applications are: Radiant tubes, furnace muffles, rotary and shaft furnaces, kiln rollers and other furnace installations, glass pot for melting radioactive waste, methanol and ammonia synthesis, hydrogen production, reformers in the chemical and petrochemical industries, components in automotive exhaust systems, glow plugs for diesel engines.

Corrosion properties

VDM® Alloy 602 CA is especially characterized by very good oxidation resistance, which is better across the entire application range up to 1200 °C than with VDM® Alloy 601. Even under extreme conditions, such as cyclic heating and cooling, VDM® Alloy 602 CA retains this property, which is caused by a tight and adhering alumina layer, which is very resistant to chipping. High temperature oxidation tests show that, compared to other high temperature materials, this material has the lowest mass loss under cyclic stress. Caused by its chromium and aluminum content, VDM® Alloy 602 CA is also highly resistant in oxidizing sulfur-containing atmospheres at elevated temperatures. The good resistance of VDM® Alloy 601 against carburizing can be increased even further by VDM® Alloy 602 CA. This also applies to the metal dusting resistance of the material.


Alloy 602 CA has a face-centered cubic lattice. The good mechanical properties, especially at temperatures above 1000 °C, are generated by primarily precipitated M₂₃C₆ or M₇C₃ carbides. Additional gamma precipitations can form below 800°C.

This material data has been provided by VDM Metals.

All metrics apply to room temperature unless otherwise stated. SI units used unless otherwise stated.
Equivalent standards are similar to one or more standards provided by the supplier. Some equivalent standards may be stricter whereas others may be outside the bounds of the original standard.