Material Database

PtIr20 / Hera 174

  • General Designation: PtIr20
  • Applications: contacts, electrodes, sliding contacts, spark plug electrodes, Medical wire
  • Product Forms: wire
  • Density (g/cm³): 21.7


Age Hardenable
Material Behaviour
Forming Process
formable, machinable, can be roll clad

IACS Min. (%) [100% IACS ≙ 58 S*m/mm²]
IACS Max. (%) [100% IACS ≙ 58 S*m/mm²]
Thermo-emf. vs. copper Hard (mV)
Temperature coefficient of electric resistivity
From Temperature (°C)
To Temperature (°C)
Hard (x10-4/K)
Annealed (x10-4/K)
0 100 7.5 8.2
Sliding Contact
From Ampere
To Ampere
From Volt
To Volt
0.01 1 0 30

Young's Modulus (GPa)
Modulus of Rigidity (GPa)
Hardness (HV)
Tensile strength (MPa)
Yield strength (MPa)
Elongation (%)
190 570 380 21
Work hardened
Hardness (HV)
Tensile Strength (MPa)
Yield Strength (MPa)
Elongation (%)
300 940 920 2
Property Range
Hardness (HV)
Tensile Strength (MPa)
Yield Strength (MPa)
Elongation (%)
190 - 300 570 - 940 380 - 920 2 - 21

Melting Range
From Temperature (°C)
To Temperature (°C)
1830 1855
Linear Coefficient of Expansion³
From Temperature (°C)
To Temperature (°C)
Coefficient (x10-6/K)
20 300 7.7


The information in this data sheet contains only general information on the use of our products or examples for their application. They do not release the customer from a careful inspection of the delivered product for its fitness for the customer's particular purpose of use. Any customer's special requests regarding the particular use of a product will only be authoritative if Heraeus has confirmed to the customer in writing at the time of conclusion of a corresponding contract that the product delivered is fit for the customer's intended use. Heraeus, therefore, does not guarantee the correctness and completeness of the information regarding the customer's intended use. The customer's purchase will be governed exclusively by the written order confirmation of Heraeus and the Heraeus General Terms of Sale and Delivery, which are available at This data sheet may be subject to changes at any time.

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