Close (Impression) Die Forging
Metal shaped between two matched dies to produce near-net-shape components with continuous grain flow, exceptional strength, and the repeatability production programs demand.
Shaped by the die, strengthened by the flow
In closed (impression) die forging, a heated billet is driven into the sculpted cavity of matched dies. As the metal fills the impression, its internal grain structure is forced to follow the contour of the finished part rather than being cut across by machining. The result is a component that is denser, tougher, and more fatigue-resistant than one produced from bar stock or castings.
MTS Forge has run impression die work since 1986, developing tooling and process sequences that hold shape and consistency part after part. From a single proof forging to a full production release, the same die produces the same component — the defining advantage of the process for programs that cannot tolerate variation.
What impression die forging is good for
Best suited to components that carry load, see fatigue cycles, or ship in repeatable volume — where grain flow and consistency are worth the tooling investment.
Structural fittings, brackets, and joints where strength-to-weight and traceable grain flow are non-negotiable.
Aerospace market
Rugged, mission-critical hardware forged to print with the repeatability defense supply chains require.
Defense market
High-duty components for turbines, valves, and generating equipment that run under heat and pressure.
Power Generation
Process capabilities
- Carbon, alloy, and stainless steels, plus specialty and exotic alloys on request
- Near-net-shape forging that reduces machining stock and material waste
- Continuous, contoured grain flow for superior fatigue and impact strength
- High repeatability from dedicated tooling — ideal for production runs
- Component weights from a few pounds to substantial heavy sections
- In-house heat treatment and rough machining to finish the part
- ISO 9001:2015 registered quality system (QAS Int'l, Cert. No. US5024)
Why customers specify impression die forging
Superior grain flow
Metal fibers follow the part contour, delivering strength and fatigue life a machined blank cannot match.
Near-net shape
Forgings arrive close to final geometry, cutting machining time, material removal, and lead time.
Repeatability
One die, one geometry — every piece in the run matches the last, part after part.
Structural strength
Dense, void-free grain structure stands up to heavy loads, impact, and cyclic duty.
Material efficiency
Less scrap per part and better yield from premium alloys where cost matters most.
Certified quality
Documented, ISO 9001:2015 process control with traceability from billet to shipment.
Ready to forge your next component?
Send us your print or specification and our team will scope tooling, material, and lead time for your impression die program.