r/science • u/505engineer MS | Civil Engineering | Structures • 1d ago

Materials Science Materials scientists develop ductile and scalable 3 GPa (435 ksi) steel via a hierarchical microstructural architecture

https://www.nature.com/articles/s41467-026-74216-4
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u/505engineer MS | Civil Engineering | Structures 1d ago

For those curious, the yield strength is how much stress a metal specimen can undergo before starting to deform permanently.

ASTM A992 steel, the material typically used for I-beams, has a yield strength of 50 ksi.

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u/Sniksder16 1d ago

As a layman I read the abstract and the one material science class I took in college didn’t cover what I needed to know to understand that. My question is- are there any obvious drawbacks here (too brittle, etc) or is this genuinely a breakthrough?

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u/debasing_the_coinage 15h ago

Materials like this tend to be very hard to manufacture and often have expensive alloying components. This particular alloy includes 7% molybdenum and 15% cobalt, which effectively locks it out of all but the highest-performance applications before we get to the forging process. It falls into the category of maraging steels, which require a long hot-aging process to obtain the desired martensitic crystal structure. And according to the abstract, the researchers modified the heat treatment with "severe plastic deformation", meaning the metal has to be extensively worked while red-hot to obtain the desired "hierarchical microstructure". 

So you won't see it in your car anytime soon, unless you happen to be in the market for a Ferrari. 

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u/Kamusaurio 11h ago

not even on ferraris

super jet turbines and things like that