PtRh20 Soft Annealed (+A): High-Performance Alloy for Lab Equipment

The material PtRh20 (in the literature also Pt20Rh, Pt80Rh20 or PtRh80/20) is used for highly stressed laboratory equipment, catalysts, electrodes, glass fiber nozzles and lining materials, for crucibles, casings and stirrers in viscometry as well as for glass melting tanks. The mechanical, thermal and corrosive resistance increases with increasing rhodium content. An advantage of the platinum-rhodium alloy is that even in an oxidizing atmosphere only a minimum of weight loss occurs. The material is ductile, corrosion-resistant, oxidation-resistant and high temperature resistant. It is machinable, roll-cladable and conditionally deductible from the gas phase.

Properties

General

Property	Temperature	Value
Density	20.0 °C	18.7 g/cm³

Mechanical

Property	Temperature	Value	Comment
Elastic modulus	20.0 °C	240 GPa
Elongation	20.0 °C	32 %
Hardness, Vickers	20.0 °C	113 [-]
Poisson's ratio	23.0 °C	0.39 [-]	Typical for Platinum
Shear modulus	20.0 °C	86 GPa
Tensile strength	20.0 °C	380 MPa
Yield strength	20.0 °C	110 MPa
Yield strength Rp0.2	20.0 °C	110 MPa

Thermal

Property	Temperature	Value	Comment
Coefficient of thermal expansion	300.0 °C	1.04E-5 1/K
	700.0 °C	1.09E-5 1/K
	1200.0 °C	1.15E-5 1/K

Melting point		1769 °C	Typical for Platinum
Specific heat capacity	23.0 °C	136 J/(kg·K)	Typical for Platinum
Thermal conductivity	20.0 °C	28 W/(m·K)

Electrical

Property	Temperature	Value
Electrical resistivity	20.0 °C	2.08E-7 Ω·m

Chemical properties

Property	Value
Platinum	80 %
Rhodium	20 %

PtRh10 Soft Annealed Alloy (+A) – Premium Performance for High-Temperature Lab Equipment PtW5 Deformed Condition: Impact on Spark Plug and Switch Contact Performance

Metal