Case Overview
An industrial furnace manufacturer building box and continuous furnaces was replacing imported heating-element wire whose resistance per meter was uncontrolled. Elements assembled from different spools produced uneven heat distribution, while premature element failures triggered warranty claims. The OEM needed wire with verifiable electrical properties and predictable life.
DZX qualified with FeCrAl element wire held to ±5% resistance per meter, supplied with surface-oxidation condition and documented maximum service temperatures by grade. This eliminated element-to-element power variation and restored the OEM’s confidence in its warranty commitments.
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 | Industrial furnace OEM (box, continuous and heat-treatment furnaces) |
| Project Scale | Multiple furnaces built annually, each with heating-element sets |
| Application | Furnace heating-element wire |
| Materials Supplied | FeCrAl(0Cr21Al6、0Cr25Al5)、NiCr(Cr20Ni80) |
| Supply Forms | Wire, strip and flat wire |
| Lead Time | Standard grades: 2-3 weeks; custom sizes: 4 weeks |
| Project Country | Italy |
| Project Year | 2025 |
Our Solution
Imported element wire disappointed the OEM in three areas:
- Resistance variation: resistance per meter varied by more than ±8% between spools, producing uneven furnace temperatures and hot spots that shortened element life.
- Inconsistent surface oxide: variable oxide quality affected high-temperature emissivity and service life.
- Warranty risk: premature failures prompted customer claims. The OEM needed documented material properties to substantiate and improve its element designs.
DZX made electrical performance a delivery specification:
FeCrAl element wire was drawn with resistance per meter within ±5%, verified by batch, with documented diameter tolerances and surface condition. NiCr grades covered moderate-temperature elements requiring ductility after service. Every batch included chemistry, resistance and dimensional reports, while our application data provided element-life guidance for OEM design validation.
| Material | Representative Grades | Maximum Service Temperature | Available Forms |
|---|---|---|---|
| FeCrAl alloys | 0Cr21Al6、0Cr25Al5 | 950-1400°C | Wire, strip and flat wire |
| NiCr alloys | Cr20Ni80、Cr15Ni60 | 1100-1300°C | Wire, strip and flat wire |
0Cr21Al6 / 0Cr25Al5 wire and strip
Cr20Ni80 wire and strip
Industrial furnace heating elements
Technical Specifications
Key technical parameters agreed before production. Contact us for grade-specific datasheets and tolerance-verification reports.
| Parameter | Agreed Specification | Verification Method |
|---|---|---|
| Resistance per meter | Nominal value ±5% | Coil-by-coil resistance testing |
| Wire diameter | To drawing (e.g. 3.0 mm ± 0.03 mm) | Micrometer sampling |
| Surface oxidation condition | Uniform, according to grade-specific processing requirements | Visual inspection + process records |
| Maximum Service Temperature | By grade (e.g. 0Cr25Al5: 1400°C) | Documented by batch |
| Chemical composition | To grade standard (GB/T 1234) | Chemical analysis report |
Each supplied batch includes a quality inspection certificate with chemical analysis, meeting the applicable standard for each grade.
| Material | Applicable Standards |
|---|---|
| FeCrAl / NiCr heating alloys | GB/T 1234、ASTM B344 |
| Quality System | Inspection certificate including chemistry and resistance reports |
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
- Uniform heat distribution: ±5% resistance tolerance eliminated hot spots between element sets
- Fewer warranty claims: documented properties supported design validation and life prediction
- Consistent element assembly: uniform diameter and surface condition simplified winding
- Grade-matched selection: FeCrAl and NiCr supplied by furnace temperature zone
- Auditable batches: chemistry, resistance and dimensional reports for each coil
- Reliable delivery: standard grades in 2-3 weeks, aligned with production schedules
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.
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Energy Industry Applications
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