Inconel X-750 Split lock washers
ASME B18.21.1AMS 5698 / AMS 5699
X-750 provides an age-hardenable route for a helical washer exposed to heat. The spring condition must deliver the required recovery after compression; the alloy name alone does not establish vibration-locking performance.
- MOQ
- 100PCS
- Samples · typical
- ~20 days
- Production · typical
- 25–35 days
- Heat treatment
- Solution treated and aged
EN 10204 3.1 MTC + heat-number traceability
Which standard is on your order?
Raw Material Specifications
Dimension Reference
Heat Treatment
Solution treated and agedSolution treatment prepares the alloy for controlled precipitation aging, which develops the strength of the ordered condition.
What we can make in Alloy X-750
Free state
The open helical shape supplies initial spring travel as a screw or nut is tightened. Free height and section size determine how much travel is available before the washer becomes flat.
Clamped state
Once flattened, little spring travel remains to compensate for settling. For an assembly needing controlled preload travel, compare a disc spring; for a vibration-critical joint, select a locking method validated for that joint.
- Form
- Split helical ring
- Key dimensions
- Bore · Section · Free height
- Assembly
- Under nut or bolt head
- Sizing
- Metric · Inch
- Final condition
- Solution treated and aged
- Inspection
- Bore · Section width and thickness · Free height
Manufacturing route
Wire or profiled section is formed into the helical ring; the split, section and free height are controlled before final condition checks.
Heat treatment & final condition
Solution treatment and the specified aging condition are recorded against the production lot; final dimensions are checked after thermal processing.
Working performance
The spring heat-treatment condition is selected for working stress and temperature. Load at working deflection and permanent set are acceptance characteristics.
Where X-750 fits — and what matters
Furnaces & Heat Treatment
Heat-treatment fixturesInconel X-750 split lock washers fit under a bolt head or nut on heat-treatment fixtures when the assembly drawing calls for a helical washer. Compression and recovery belong to the washer specification. Hot dwell, thermal expansion and repeated furnace cycles set the working load.
Power & Turbines
Boiler-duct supports and hot auxiliary bracketsInconel X-750 split lock washers fit under a bolt head or nut on boiler-duct supports and hot auxiliary brackets when the assembly drawing calls for a helical washer. Compression and recovery belong to the washer specification. Hot dwell and start-stop expansion act on the supported or moving component.
Chemical Processing
Reformer tube-support and heater fixturesInconel X-750 split lock washers fit under a bolt head or nut on reformer tube-support and heater fixtures when the assembly drawing calls for a helical washer. Compression and recovery belong to the washer specification. These parts work in the heated equipment zone, where sustained loading and thermal expansion govern their section and clearance.
Same split lock washer. Different material priorities.
Inconel X-750 material dataInconel 718
Precipitation-hardened strength for compact, highly loaded connections.
- Connection priority
- Elastic recovery after compression
- Strength after aging
- Machine-stock properties and final aged properties describe different states. The final heat-treatment lot and mechanical results establish the strength available in the installed part. At the split edges and compressed contact faces, the relevant metal temperature can differ from the process or furnace set point.
Inconel 625
Solid-solution strength and resistance to aggressive process liquids.
- Connection priority
- Elastic recovery after compression
- Annealed or solution-annealed 625
- The delivery condition affects strength and high-temperature response. Keep the specified condition with the component’s mechanical acceptance; 718-style aging is not the strengthening route for 625. Include liquid retained at the split edges and compressed contact faces in the exposure description.
From drawing to documented delivery
- 01Drawing & BOMForm, dimensions and quantity
- 02Material & formingGrade, heat and manufacturing route
- 03Final inspectionGeometry, threads and ordered tests
- 04Documents & dispatchLot records and identified packing
Order documents
- Material identity
- UNS N07750 · heat number · ordered condition
- Final-part acceptance
- Lot-linked aging record and mechanical acceptance in the final condition. Load–deflection and permanent-set results for the specified spring geometry.
- Dimensional record
- Bore · Section width and thickness · Free height
- Traceability
- EN 10204 3.1 material certificate · production lot · identified packing
Build your X-750 split lock washer enquiry
Questions about X-750 split lock washers
Does corrosion-resistant stock automatically make a spring washer?
The stock needs a condition that provides the required elastic recovery. Record the final temper, compression behaviour and permanent set; a chemistry certificate alone does not describe the spring response.