SITHERM S140R
SITHERM S140R is a modified steel grade with the aim of obtaining the highest possible thermal conductivity, while maintaining a sufficient level of toughness and hardenability.
This grade is not subject to NADCA#229, but is tested according to the same level of mechanical properties as grade B.
SITHERM S140R main characteristic is its high thermal conductivity, which is maintained even at elevated temperatures. This results in greater resistance to the formation of intergranular cracks, known as “pyrocracks,” caused by thermal fatigue, a particularly important feature in the die-casting industry.
The increase in thermal conductivity has been achieved without compromising other fundamental properties of the material, such as hardness, hot wear resistance, toughness, hardenability, and oxidation resistance. This steel offers high resistance to tempering and softening due to prolonged exposure to high temperatures, making it highly suitable for manufacturing tools for die-casting, extrusion dies, and tools and molds for hot stamping.
Key Properties
- High thermal conductivity – Maintained even at elevated temperatures.
- Resistance to pyrocracks – Greatly reduces the formation of intergranular cracks caused by thermal fatigue, an essential property in die casting.
- Balanced performance – Increase in conductivity without compromising hardness, hot wear resistance, toughness, hardenability, or oxidation resistance.
- Thermal stability – High resistance to tempering and softening during prolonged high-temperature exposure.
Applications
- injection molding molds requiring rapid and/or uniform cooling,
- hot runner systems for plastic molding,
- inserts used in die casting which are prone to overheating,
- small die casting tools with large surfaces exposed to high thermal loads
- hot shearing blades subject to high thermal loads, where Cr-Mo-V steel blades would overheat and soften,
- other applications requiring high thermal conductivity.
Working hardness from 44 up to 50 HRC.
Downloads
Product Data Sheet
You can find more detailed information in the downloadable datasheet.
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