Z6NCT25
Z6NCT25 Stainless Steel – High-Temperature Alloy Supplier in Tunisia
Z6NCT25 is a French AFNOR-related designation associated with high-temperature alloy steels. The related designation E-Z6NCT25 is used in aerospace material references for an age-hardening, iron-nickel-chromium alloy in the A286 family. This alloy is valued for its combination of high mechanical strength, elevated-temperature performance, oxidation resistance and useful corrosion resistance under suitable operating conditions.
The related A286 alloy is commonly identified by UNS S66286, EN 1.4980 and the designation X6NiCrTiMoVB25-15-2. Exact equivalence must be established from the governing standard, material condition and product specification before procurement.
Z6NCT25-related alloys are used in demanding applications where conventional stainless steels may not provide the required strength at elevated temperatures. Typical application areas include aerospace components, high-temperature fasteners, gas turbine equipment and specialized industrial machinery.
Emirerri Steel supports industrial material enquiries based on the required grade, technical specification, product form, dimensions and certification requirements.
Key Characteristics
- Material designation: Z6NCT25 / E-Z6NCT25 — verify the exact specification
- Related alloy family: A286 / Grade 660
- Common related identifiers: UNS S66286 and EN 1.4980
- Material type: Iron-nickel-chromium, age-hardening alloy
- Strength: High strength achievable through the specified heat-treatment process
- Temperature performance: Suitable for selected elevated-temperature applications
- Oxidation resistance: Good under appropriate operating conditions
- Fabrication: Requires procedures suitable for age-hardening alloys
- Typical industries: Aerospace, gas turbines, power generation and high-temperature engineering
Z6NCT25 Chemical Composition
The following table gives indicative composition limits reported for the related E-Z6NCT25 designation. It must not be used as a substitute for the chemical composition requirements in the actual purchasing standard or material certificate.
| Element | Indicative composition (% by weight) |
|---|---|
| Carbon (C) | ≤ 0.08 |
| Silicon (Si) | 0.40–1.00 |
| Manganese (Mn) | 1.00–2.00 |
| Phosphorus (P) | ≤ 0.030 |
| Sulfur (S) | ≤ 0.015 |
| Chromium (Cr) | 13.50–16.00 |
| Nickel (Ni) | 24.00–27.00 |
| Molybdenum (Mo) | 1.00–1.50 |
| Vanadium (V) | 0.10–0.50 |
| Titanium (Ti) | 1.90–2.30 |
| Aluminium (Al) | ≤ 0.35 |
| Boron (B) | Specification-dependent |
Boron limits and other chemistry requirements can differ by material specification or aerospace variant. Confirm the exact grade and applicable standard before using these figures for acceptance.
Z6NCT25 Mechanical Properties
Mechanical properties depend significantly on the product form, manufacturing route, heat treatment and applicable specification. The alloy family is designed to develop high strength through age hardening.
| Property | Technical information |
|---|---|
| Tensile strength | Depends on product form and heat-treated condition |
| Yield strength | Depends on specification and heat treatment |
| Elongation | Must be verified against the governing product standard |
| Hardness | Depends on the final heat-treated condition |
| High-temperature strength | Suitable for specified applications requiring strength at elevated temperatures |
| Heat treatment | Solution treatment and ageing, as prescribed by the relevant specification |
For aerospace and safety-critical applications, mechanical properties should always be confirmed using the applicable material standard, approved heat-treatment procedure and material test certificate.
Z6NCT25 Physical Properties
The related A286 alloy family is used in applications requiring mechanical strength at elevated temperatures and resistance to oxidation.
| Property | Description |
|---|---|
| Material structure | Austenitic iron-nickel-chromium alloy |
| Density | Approximately 7.9–8.0 g/cm³, depending on specification |
| Thermal performance | Designed for selected elevated-temperature service |
| Oxidation resistance | Good under suitable conditions |
| Heat treatment | Solution treatment and age hardening, as specified |
| Service temperature | Depends on stress, exposure time, environment and component design |
No single maximum operating temperature should be applied to every component. The allowable temperature depends on mechanical loading, exposure duration, oxidation conditions and the governing engineering design requirements.
High-Temperature Performance and Oxidation Resistance
The related A286 alloy is designed for components exposed to elevated temperatures while maintaining useful mechanical properties. Its alloying elements contribute to strength and oxidation resistance under appropriate conditions.
Elevated-Temperature Strength
Age hardening helps develop the mechanical properties required for highly stressed components. Correct heat treatment is essential to achieve the properties specified for the final application.
Oxidation Resistance
Chromium contributes to oxidation resistance at elevated temperatures. Suitability depends on the atmosphere, temperature, exposure time and surface condition.
Corrosion Resistance
The alloy offers useful corrosion resistance in selected industrial environments, but it should not be treated as universally resistant to acids, chlorides or other aggressive chemicals. The service environment must be assessed before material selection.
Heat Treatment
Heat treatment is an important part of achieving the required mechanical performance of the related A286 alloy family.
Depending on the applicable specification, processing may include:
Solution treatment
Controlled cooling
Ageing or precipitation hardening
Verification of final mechanical properties and hardness
Exact temperatures, holding times and cooling requirements must come from the applicable material specification or an approved procedure. Do not apply a generic heat-treatment cycle to a safety-critical component without confirming its suitability.
Welding and Fabrication
Welding and fabrication require appropriate controls to preserve the intended mechanical properties and material integrity.
Use qualified welding procedures suitable for the exact alloy and component.
Select compatible filler materials based on the specification and service requirements.
Control heat input and interpass temperature according to the qualified procedure.
Consider the effects of welding on the subsequent heat treatment and final properties.
Use appropriate machining tools and parameters for the alloy’s strength and work-hardening behaviour.
Confirm dimensional tolerances, inspection requirements and any post-fabrication treatment.
For aerospace or other critical applications, follow the approved engineering specification and traceability requirements.
Common Standards and Related Designations
| System | Related designation |
|---|---|
| AFNOR-related designation | Z6NCT25 / E-Z6NCT25 — exact form to be verified |
| Common alloy family | A286 / Grade 660 |
| UNS | S66286 |
| EN material number | 1.4980 |
| Alloy designation | X6NiCrTiMoVB25-15-2 |
| Aerospace specifications | Confirm the applicable AIR, AMS or other approved specification for the exact product |
Important: Related designations do not automatically establish full equivalence. Before ordering, confirm the exact material designation, product form, standard revision, heat-treatment condition, inspection requirements and required certification.
Applications
Aerospace Engineering
Selected high-strength components used in demanding aerospace applications, subject to the approved material specification.
Gas Turbines and Power Generation
Components exposed to elevated temperatures and mechanical loading where the alloy meets the design requirements.
High-Temperature Fasteners
Bolts, studs and other fastening components requiring strength retention under specified service conditions.
Industrial Machinery
Specialized components for equipment operating under demanding thermal and mechanical conditions.
Engineering and Manufacturing
Precision components and fabricated parts where the specified alloy’s strength and temperature performance are required.
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