Material Database

PtW8 / Hera 158

  • General Designation: PtW8
  • Applications: spark plug electrodes, Resistance wire, Medical wire
  • Product Forms: wire
  • Density (g/cm³): 21.26


Age Hardenable
Material Behaviour
Forming Process
formable, machinable, hardly formable

oxidation resistant to 1000°C

IACS Min. (%) [100% IACS ≙ 58 S*m/mm²]
IACS Max. (%) [100% IACS ≙ 58 S*m/mm²]
Temperature coefficient of electric resistivity
From Temperature (°C)
To Temperature (°C)
Hard (x10-4/K)
Annealed (x10-4/K)
0 100 6.36

Property Range
Hardness (HV)
Tensile Strength (MPa)
Yield Strength (MPa)
Elongation (%)
200 - 300 800 - 1100 400 - 1000 2 - 20

Melting Range
From Temperature (°C)
To Temperature (°C)
1865 1885


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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