Age-hardenable nickel-chromium alloy parts machined on 5-axis centers, with tolerances held to ±0.005 mm and full inspection before shipment.
This alloy punishes bad tooling choices and loose cutting data. These are the failures we keep finding on drawings and incoming parts.
X-750 hardens the moment the tool rubs instead of shears. A light pass on a worn insert raises surface hardness fast, and the next pass starts chattering. On thin walls and small bores, the part is often scrapped before anyone notices the tool was dull.
Threading bolts, studs and turbine hardware in aged condition cracks the crest and tears the flank. Threads that look fine under a bench light fail a 100% thread inspection, and a whole lot goes back to the saw.
Parts machined to final size before aging move in the furnace. A bore that measured true on the bench comes back oval, and the flatness on a sealing face drifts out. Rework is possible only if enough stock was left.
Carbide consumption on nickel alloys is several times that of stainless. A shop that prices X-750 like 17-4PH either eats the cost or quietly slows the cycle, and the delivery date slips without an explanation.
Fixture, tool path and heat treat sequence are decided together before the first chip.
Nickel-based alloys keep their strength at red heat, which is exactly why they are hard to cut. We run sharp, positive-geometry carbide at conservative surface speeds and heavy enough feed per tooth that the edge stays under the work-hardened skin instead of skating on it. Depth of cut stays constant through the pass so the load on the insert does not spike at corners.
Every roughing program gets high-pressure coolant aimed at the insert tip, not the part. Chips clear on the first try, heat leaves with them, and the insert wears evenly instead of chipping on one flank.
Most X-750 parts are used in the aged condition, and the furnace moves them. We rough with 0.3–0.5 mm of stock on critical faces, send the lot for solution treatment and aging, then come back and finish on the same fixture datums. Bores stay round, sealing faces stay flat, and the drawing tolerance applies to the final state, not the soft one.
For features that cannot survive a second setup, we finish in one pass on a 5-axis center with the part clamped once. Positional accuracy across five faces stays inside ±0.005 mm, which removes the stacked error of four separate operations.
Use this to decide before you commit a drawing to a nickel alloy.
| Condition or alloy | Where it fits | Watch out for |
|---|---|---|
| X-750, aged | Bolts, springs, turbine hardware up to about 700 °C | Machine oversize, then age and finish |
| X-750, annealed | Forming and heavy roughing before final heat treat | Low strength; not a service condition |
| Inconel 718 | Larger structural parts and welded assemblies | Slower to age, different cutting data |
| 17-4PH stainless | Corrosion resistance without high heat | Loses strength well below X-750 range |
| Waspaloy | Higher temperature turbine discs and rings | Harder to source, higher cost per kg |
One shop for the operations your part needs, from first article to production.
16 simultaneous 5-axis centers handle contoured blades, vanes and housings with compound angles in one setup.
12 four-axis mills and 27 three-axis machines cover plates, brackets and prismatic parts where five axes add nothing.
16 mill-turn centers produce shafts, bushings and threaded fasteners complete, with the thread cut in the same cycle as the shank.
First articles machined from bar or plate so you can test fit and function before tooling or a production order.
Bead blasting, tumbling, brushing and polishing, plus electroless nickel and silver plating for galling resistance.
First article reports, material certificates and dimensional reports issued on request with the shipment.
Numbers you can plan a drawing around.
| Item | Range | Notes |
|---|---|---|
| Maximum part size | 4,000 mm | Large travel 4,000 × 400 × 150 mm |
| Medium travels | 750 × 1,150 × 550 mm | Also 600 × 600 × 600 mm |
| Compact travels | 500 × 500 × 450 mm | Also 500 × 310 × 200 mm |
| Rotary table | Ø400 mm | For 4-axis and 5-axis indexing |
| Tolerance | ±0.005 mm | ±0.0002 in on request |
| Surface finish | Ra 1.6–3.2 μm | Down to Ra 0.2–0.8 μm |
Capacity, process control and paperwork that holds up in an audit.
Fifteen years of production work, with nickel alloys and titanium run alongside stainless and aluminum every week.
127 high-precision machines across three wholly-owned plants, so a hot job does not wait for a spindle.
Dimensional tolerance maintained across five-axis work, verified on the machine and again at final inspection.
Quotation plus a free DFM analysis within 12 hours of receiving your files, with the tooling risks flagged.
Raw material check, in-process monitoring and final inspection on every lot. Reports on request.
Uploads stay secure and confidential, and a non-disclosure agreement is available on request.
Sealing rings, vanes and small turbine parts that must hold form at high temperature.
Bolts, studs and nuts threaded in the aged condition without crest chipping.
Frames, brackets and load paths where strength-to-weight decides the alloy.
Parts that stay elastic after aging and resist oxidation in service.
For most X-750 parts, rough in the annealed or solution-treated condition, age, then finish. Aging moves the part, so a bore finished to final size before the furnace will not measure true afterward.
If the drawing calls out aged properties and tight geometry, send that requirement with the model. We will leave stock where it is needed and finish after heat treat on the same datums.
±0.005 mm on dimensions we control in-house, verified during the run and again at final inspection. That is not a blanket figure for every feature.
Deep bores, thin walls and long unsupported sections move more than that. When a drawing pushes past what the geometry allows, the DFM analysis will say so before we quote.
Yes. Bar stock is the usual route for fasteners, bushings and small hardware. Forgings and ring blanks come in for larger parts where grain flow matters.
Send the stock form and condition with the RFQ. The cutting data and the stock allowance change with both.
Aged X-750 is where thread crests fail. We cut threads with the correct infeed method for the alloy, keep the tool sharp, and inspect the crest instead of trusting a visual check.
If the thread is rolled rather than cut, tell us. Rolled threads need a different blank diameter and a different pre-age sequence.
No minimum. We run from a single prototype up to 10,000+ part runs. One piece is a valid order if that is what the program needs.
Roughing strategy and fixturing do not change between a one-off and a run, so a prototype is a real test of the production process.
Every lot gets a raw material check, in-process monitoring and a final inspection before shipment. Reports are issued on request rather than assumed.
First article reports, material certificates and dimensional reports can travel with the shipment. Tell us the format your quality group expects.
ISO 9001:2015, IATF 16949:2016, ISO 13485:2016 and ISO 27001:2022. The information security certification covers how we handle your files.
If your program needs something beyond these, raise it during the quote so we can say yes or no before you commit.
Quotation and free DFM analysis come back within 12 hours. Production can start within 24 hours of a released order, and parts typically ship in 3–5 days.
The clock depends on material availability and heat treat, which sit outside the machine shop. We tell you which step is the long pole instead of quoting a date we do not control.
Upload your model and the heat treat callout. You get a quote, a DFM read and a tooling plan in 12 hours.
12-hour quote100% inspectionNo minimum orderNDA on request
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Upload your 3D model or 2D drawing and get a quotation with a free DFM analysis. Maximum processing size 4,000 mm.
CNC Metals 13 grades
CNC Plastics 10 grades
Machines & processes 12 options
Surface & post-processing 10 options
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