Normally, metals (steels) are quite ductile and the maximal strength in tension and compression are equal (even material).
However, ceramic materials are brittle and their compressive strength is much higher compared to their tensile strength (uneven material).
What about ultra-high hard steels (HB > 700)? These are quite brittle (low fracture toughness), are these uneven materials, like ceramics?
The tensile strength of ultra-high solid steel species at one-dimensional uniform tension reaches 1000 MPa at room temperature. With special magnets, they exceed 1000 MPa. Under pressure, this strength is higher and depends on the load pattern.
hi Erik,
inconel 718 (and some other inconel) is above 1GPa :
http://www.hightempmetals.com/techdata/hitempInconel718data.php
some Maraging steel products can even overpass 2 GPa of Yield strength :
https://en.wikipedia.org/wiki/Maraging_steel
best regards
Hi Emil and Michel,
Thanks for your reply to my question, however I am not interested in the values of tensile strength, but rather the ratio between the tensile and compressive strength values. Are UHH steels uneven materials and does this change in ratio increase with increasing hardness (brittleness)?
Hi Erik. I can not quantify exactly the ratio and answer your question. Nevertheless, consider that logically, the tensile strength is expected to be lower that the compressive strength. The reason should be that tensile stress promotes crack and cleavage propagation in contrast to a compressive strength.
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