Alloy 10X (C17500) TH04 Tube – High‑Temperature Copper Alloy with Superior Strength & Conductivity

Materion’s Alloy 10X is a copper-cobalt-beryllium-zirconium alloy developed for improved high temperature strength and ductility. Most high strength copper alloys lose significant strength and ductility at elevated temperature. Alloy 10X retains good strength and ductility at temperatures up to 800 °F/430 °C. With its combination of good elevated temperature strength and conductivity, it has superior resistance to thermal cracking. It is the copper alloy of choice for operation above 575 °F/300 °C where high strength is required. Alloy 10X is also available in TF00 temper. Thicker sections and larger diameters available in TF00 temper.

Properties

General

Property	Temperature	Value
Density	23.0 °C	8.83 g/cm³

Dimension

Property	Value
Outside diameter	9.5 - 76 mm
Wall thickness	Typically 10 to 20% of OD

Mechanical

Property	Temperature	Value
Elastic modulus	23.0 °C	138 GPa
Elongation	20.0 °C	15 %
	427.0 °C	5 %

Hardness, Rockwell B	23.0 °C	92 [-]
Tensile strength	20.0 °C	690 MPa
	427.0 °C	515 MPa

Yield strength Rp0.2	20.0 °C	585 MPa
	427.0 °C	450 MPa

Thermal

Property	Temperature	Value	Comment
Coefficient of thermal expansion	23.0 °C	1.76E-5 1/K
Melting point		1010 °C
Specific heat capacity	23.0 °C	414 J/(kg·K)	at 25°C
Thermal conductivity	23.0 °C	225 W/(m·K)	at 25°C

Electrical

Property	Temperature	Value
Electrical resistivity	23.0 °C	2.6E-6 - 3.2E-6 Ω·m
Specific Electrical conductivity		45 - 55 % IACS

Chemical properties

Property	Value
Beryllium	0.4 - 0.7 %
Cobalt	2 - 2.7 %
Copper	Balance
Zirconium	0.12 - 0.4 %

Technological properties

Property
Application areas	High performance powertrain automotive applications such as exhaust valve seats.

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