PtRh10 Soft Annealed Alloy (+A) – Premium Performance for High-Temperature Lab Equipment

The material PtRh10 (in the literature also Pt10Rh, Pt90Rh10 or PtRh90/10) is used for highly stressed laboratory equipment, such as crucibles for melt digestion of minerals and ferroalloys as well as for crucibles, casts and stirrers in viscometry also in the fine grain stabilized state. Furthermore, the material is used for thermocouples (pairing PtRh10/Pt up to 1500°C), electrodes, glass fiber nozzles and lining materials for glass melting tanks as well as for catalyst grids. 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	20 g/cm³

Mechanical

Property	Temperature	Value	Comment
Elastic modulus	20.0 °C	208 GPa
Elongation	20.0 °C	32 %
Hardness, Vickers	20.0 °C	102 [-]
Poisson's ratio	23.0 °C	0.39 [-]	Typical for Platinum
Shear modulus	20.0 °C	72 GPa
Tensile strength	20.0 °C	300 MPa
Yield strength	20.0 °C	180 MPa
Yield strength Rp0.2	20.0 °C	180 MPa

Thermal

Property	Temperature	Value	Comment
Coefficient of thermal expansion	300.0 °C	1.02E-5 1/K
	700.0 °C	1.07E-5 1/K
	1200.0 °C	1.12E-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	30 W/(m·K)

Electrical

Property	Temperature	Value
Electrical resistivity	20.0 °C	2E-7 Ω·m

Chemical properties

Property	Value
Platinum	90 %
Rhodium	10 %

EN AW-5005 Aluminum Alloy: Low Density, High Thermal Conductivity & Corrosion Resistance PtRh20 Soft Annealed (+A): High-Performance Alloy for Lab Equipment

Metal