Everyone knows Nvidia sits at the heart of the AI boom. Almost nobody knows who makes the turbine blades powering the gas turbines behind the next generation of AI data centers.
That changed when Elon Musk said only a few specialized casting companies can manufacture the blades and vanes needed for modern industrial gas turbines—and that all of them are massively backlogged. As power infrastructure becomes increasingly critical to AI expansion, Musk's comments have unexpectedly put one of manufacturing's most overlooked niches in the spotlight.
The Companies Behind AI's Next Bottleneck
Musk didn't identify the manufacturers by name. TechCrunch reported that four companies worldwide cast blades and vanes at industrial scale, and all of them are at capacity. TechCrunch did not name them. Among the companies that publicly advertise industrial gas turbine airfoil casting are Howmet Aerospace Inc. (HWM), PCC Airfoils, Chromalloy, Doncasters and Consolidated Precision Products — only Howmet is a standalone public company.
These aren't ordinary metal components. Turbine blades operate under extreme temperatures and stress, requiring highly specialized casting techniques and decades of manufacturing expertise. That helps explain why capacity remains limited even as demand for gas turbines has surged alongside AI infrastructure investment.
Musk has already moved past the hypothetical. SpaceX (NASDAQ:SPCX) is building its own turbine blade foundry in Bastrop, Texas, he confirmed Saturday.
"The limiting factor for nat gas turbine production is casting the blades & vanes," Musk wrote. "By doing in-house casting at SpaceX, we can accelerate nat gas turbines coming online by up to 18 months."
That cuts both ways for the incumbent casters. A shortage only a handful of companies can relieve is a pricing advantage — until the largest buyers build the capability themselves. SpaceX's foundry is the first sign AI power developers may insource blade casting rather than queue for it.
Why Howmet Aerospace Stands Out
Among the companies commonly identified as capable of producing these advanced turbine components, Howmet Aerospace occupies a unique position for investors.
Unlike PCC Airfoils, (which is owned by Berkshire Hathaway through Precision Castparts), or privately held Chromalloy, Howmet is the only major standalone public company offering direct exposure to this highly specialized corner of the supply chain.
That doesn't make Howmet the next Nvidia. But Musk's comments do suggest investors may need to broaden their understanding of AI infrastructure. If the AI buildout increasingly depends on how quickly new gas turbines can be deployed, companies making the components inside those turbines could become strategically more important than many investors previously appreciated.
Investment Takeaway
Musk's comments weren't really about turbine blades—they were about scarcity. By highlighting that only a handful of manufacturers can produce one of the most critical components in modern gas turbines, he shifted attention toward an overlooked segment of the industrial supply chain that could become increasingly important as AI infrastructure expands.
For investors, that means looking beyond the companies building AI models and designing chips. If Musk is right about where the next bottleneck lies, niche manufacturers such as Howmet Aerospace, Berkshire Hathaway-owned PCC Airfoils and Chromalloy may become just as important to watch as the technology companies driving demand.
