Case Overview
A turbine maintenance, repair and overhaul (MRO) provider was rebuilding exhaust gas temperature (EGT) monitoring systems for industrial and aviation gas turbines. Its sensor supplier had failed a material traceability audit, while replacement sensors sourced from different heats showed measurable EMF drift that disrupted maintenance-interval decisions. DZX was invited to qualify a complete instrumentation materials package: thermocouple alloys, mineral-insulated cable and high-temperature fastener bar.
Qualification passed on the first attempt: EMF performance was verified to IEC 60584-1 Class 1, MI cable used dense MgO insulation for vibration service, and Inconel 718 fastener properties were verified against AMS 5662—all within one traceable quality system.
This case summarizes the application requirements, materials supplied by DZX and delivery value. For case-specific technical data, please contact our engineering team.
| Item | Details |
|---|---|
| Client Profile | Gas-turbine MRO / sensor manufacturer (aviation and industrial) |
| Project Scale | Batch supply for overhaul lines, with quarterly rolling deliveries |
| Application | EGT sensing probes, engine instrumentation and hot-section fasteners |
| Materials Supplied | Thermocouple alloys, mineral-insulated cable, Inconel 718 and Inconel 625 |
| Supply Forms | Wire, MI cable, strip and bar |
| Lead Time | Standard grades: 2-3 weeks; MI cable: 4 weeks |
| Project Country | United Kingdom |
| Project Year | 2025 |
Our Solution
The customer had three mandatory requirements that its previous supplier could not meet together:
- High-temperature EMF accuracy: EGT probes had to retain IEC 60584-1 Class 1 tolerance after prolonged exposure up to 1100°C. Drift directly affects turbine life calculations.
- Vibration resistance: engine-mounted sensors face continuous vibration and thermal shock. Mineral-insulated cable requires dense oxide insulation without voids that allow conductor movement.
- Full traceability: the customer audit required heat numbers, chemistry and test reports for every meter of wire and every fastener batch—a gap that had already disqualified one supplier.
DZX delivered the complete package through a single auditable supply source:
Thermocouple wire was drawn to IEC 60584-1 Class 1 with controlled chemistry for high-temperature EMF stability. Mineral-insulated cable used Inconel 625 or stainless-steel sheaths and dense MgO insulation, verified by sheath-integrity testing. Inconel 718 wire and bar were supplied in an age-hardened condition with mechanical properties meeting AMS 5662. Every batch included heat numbers, chemistry and test reports matched item by item to the customer’s audit checklist.
| Material | Representative Grades | Key Properties | Available Forms |
|---|---|---|---|
| Thermocouple alloys | K, N, R, S (Class 1) | High-temperature EMF stability | Wire and compensation wire |
| Mineral-insulated cable | KX, NX, SX | Vibration and shock resistance | Sheath OD 0.5-12.7 mm |
| Inconel 718 | 718 (AMS 5662) | High-temperature strength | Wire, bar and strip |
| Inconel 625 | 625 | Sheath material, oxidation resistance | Tube and strip |
View Thermocouple Alloys → | View MI Cable → | View Inconel Alloys →
Type K / N / R / S, Class 1 EMF
Dense MgO insulation, sheath 0.5–12.7mm
Wire, bar and strip (AMS 5662)
Technical Specifications
Key technical parameters agreed before production. Contact us for grade-specific datasheets and tolerance-verification reports.
| Parameter | Agreed Specification | Verification Method |
|---|---|---|
| EMF tolerance | IEC 60584-1 Class 1 (e.g. Type K: ±1.5°C up to 375°C) | Batch calibration report |
| Continuous service temperature | Up to 1100°C (Type N/precious-metal types) | Chemistry + calibration verification |
| MI cable sheath OD | 3.0 mm ± 0.05 mm (custom sizes available) | Micrometer + sheath-integrity test |
| MgO insulation density | ≥ 3.3 g/cm³, void-free | Finished cable density testing |
| Inconel 718 condition | Age-hardened, AMS 5662 properties | Tensile/hardness test report |
Each supplied batch includes a quality inspection certificate with chemical analysis, meeting the applicable standard for each grade.
| Material | Applicable Standards |
|---|---|
| Thermocouple alloys | IEC 60584-1 |
| Mineral-insulated cable | ASTM E235, IEC 61515 |
| Inconel 718 | AMS 5662, ASTM B637 |
| Inconel 625 | AMS 5596, ASTM B443 |
Delivery and Quality Support
- Fast delivery: Sample and production lead times follow the project schedule; standard grades and sizes can be dispatched promptly from stock.
- Quality traceability: Every batch includes material certificates and inspection reports, with full heat and batch traceability.
- Technical support: Responsive support covers pre-sale material selection, drawing review and post-sale processing advice.
- Ongoing service: Regular follow-up after delivery tracks performance and addresses feedback promptly.
Customer Feedback
- Audit passed on the first attempt: heat numbers, chemistry and test reports matched the customer’s traceability checklist item by item
- Accurate life calculations: Class 1 EMF stability eliminated measurement drift in maintenance-interval decisions
- Vibration-verified sensors: dense MgO insulation and verified sheath integrity met engine operating requirements
- Batch consistency: controlled chemistry and processing ensured repeatable batch performance
- Rolling supply: quarterly production batches with stable 2-4-week lead times
- One audit, complete delivery: sensing and fastener materials documented under one quality system
Our Capabilities
Jiangsu DZX Technology Co., Ltd. (Changzhou DLX Alloy) was founded in 2016. Its core team has worked in the field since 2002, with 24 years of precision-alloy R&D and production experience, operating a self-owned 12,000-square-meter modern factory with an ISO9001 system covering three inspection stages. Annual alloy output exceeds 1,200 tonnes, serving 1500+ business customers worldwide. The company operates integrated melting, drawing, annealing and precision-machining workshops, supporting volume customization of strip, wire, tube and bar. Every batch includes a chemical analysis report (MTC) for full delivery-quality traceability.
Related Products
Aerospace Applications
Engine hot sections, airframe structures, satellite mechanisms and rocket hardware
Medical Applications
Implants, stents, electrodes, surgical instruments and MRI systems
New Energy Applications
Fuel-cell bipolar plates, PEM electrolyzers and battery materials
Energy Industry Applications
Boiler superheaters, nuclear steam generators and steam turbines
