Z12NCT25 Stainless Steel – A286 High-Temperature Alloy Supplier in Tunisia
Z12NCT25 is a designation associated with heat-resistant alloy steel and is referenced in some material sources in connection with the A286 alloy family. Related designations include UNS S66286, EN 1.4980 and X5NiCrTi26-15. The exact correspondence depends on the governing material specification and product form.
A286 is an iron-nickel-chromium alloy strengthened by precipitation hardening. It combines high mechanical strength after suitable heat treatment with useful oxidation resistance and performance in selected high-temperature environments. These characteristics make it suitable for demanding engineering applications where components must withstand mechanical stress and elevated operating temperatures.
Z12NCT25-related materials may be considered for high-temperature fasteners, turbine components, aerospace engineering and specialized industrial equipment. The correct grade must be selected according to the operating temperature, mechanical loading, manufacturing process and applicable certification requirements.
Emirerri Steel supports industrial enquiries for specialty alloys and high-performance metal products according to customer drawings, technical specifications and confirmed availability.
Key Characteristics
- Material designation: Z12NCT25
- Related alloy family: A286 / heat-resistant iron-nickel-chromium alloy
- Related UNS designation: S66286
- Related EN material number: 1.4980
- Related EN designation: X5NiCrTi26-15
- Material structure: Austenitic alloy
- Strengthening mechanism: Precipitation hardening
- High-temperature performance: Suitable for specified elevated-temperature applications
- Oxidation resistance: Good under appropriate service conditions
- Typical industries: Aerospace, gas turbines, power generation and industrial engineering
Note: Verify the exact grade designation and standard before specifying or purchasing material.
Z12NCT25 Chemical Composition
The following table gives indicative composition limits for the related A286 alloy family. These values should not be treated as guaranteed Z12NCT25 limits unless confirmed by the applicable standard or material certificate.
| Element | Indicative Composition (%) |
|---|---|
| Carbon (C) | ≤ 0.08 |
| Manganese (Mn) | ≤ 2.00 |
| Silicon (Si) | ≤ 1.00 |
| Phosphorus (P) | Specification-dependent |
| Sulfur (S) | ≤ 0.015 |
| Chromium (Cr) | 13.50–16.00 |
| Nickel (Ni) | 24.00–27.00 |
| Molybdenum (Mo) | 1.00–1.50 |
| Titanium (Ti) | 1.90–2.35 |
| Vanadium (V) | 0.10–0.50 |
| Aluminium (Al) | ≤ 0.35 |
| Iron (Fe) | Balance |
The alloying elements contribute to the material’s high-temperature strength and oxidation resistance. Titanium and other strengthening elements help develop the required mechanical properties during the specified ageing treatment.
Z12NCT25 Physical Properties
Physical properties vary with temperature, product condition and the exact alloy specification. The following values are indicative of the related A286 alloy family.
| Property | Approximate Value |
|---|---|
| Density | 7.94 g/cm³ |
| Electrical Resistivity at 20°C | 0.91 µΩ·m |
| Mean Thermal Expansion, 20–100°C | 16.4 × 10⁻⁶/K |
| Material Structure | Austenitic |
| Magnetic Behaviour | Depends on processing and condition |
| Thermal Performance | Suitable for specified high-temperature service |
| Heat Treatment | Solution treatment and ageing, as specified |
These values are for general technical reference. Use the relevant manufacturer datasheet for design calculations and material qualification.
Z12NCT25 Mechanical Properties
Mechanical properties depend on the material condition, product form, dimensions and heat treatment. The following values are indicative of certain age-hardened A286 products and must be verified against the governing specification.
| Property | Indicative Value |
|---|---|
| Ultimate Tensile Strength | Approximately 960–1,150 MPa |
| Yield Strength (0.2% proof) | Approximately 660 MPa minimum in certain specified conditions |
| Elongation | Approximately 16% minimum in certain specified conditions |
| Reduction of Area | Specification-dependent |
| Hardness | Approximately 262–341 HB in certain age-hardened conditions |
| Heat-Treatment Condition | Solution-treated and age-hardened, as specified |
These values are not universal acceptance criteria for every Z12NCT25 product. The material test certificate and exact product standard must govern the final values.
High-Temperature Performance
Mechanical Strength at Elevated Temperatures
The related A286 alloy family is designed to retain useful mechanical strength under specified elevated-temperature conditions. Its suitability depends on the applied stress, temperature, duration of exposure and component design.
Oxidation Resistance
Chromium contributes to oxidation resistance at elevated temperatures. The alloy is used in selected hot-service applications, but performance depends on the atmosphere, temperature and exposure time.
Corrosion Resistance
A286 offers useful resistance to certain corrosive environments, particularly where strength at temperature is also required. It is not universally resistant to aggressive acids, chloride-rich environments or all industrial chemicals. Each application should be evaluated separately.
Heat Treatment
Heat treatment is important for achieving the specified mechanical properties of the related A286 alloy family.
Depending on the applicable product 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 procedures must follow the approved material specification. A generic heat-treatment cycle should not be applied to safety-critical components without technical validation.
Welding and Fabrication
Fabrication requirements depend on the precise grade and product condition. Appropriate procedures are necessary to maintain material integrity and the required mechanical performance.
Use qualified welding procedures suitable for the exact alloy.
Select compatible filler materials based on the specification and service environment.
Control heat input and interpass temperature.
Assess whether post-weld heat treatment is required.
Use machining methods and tooling suitable for high-strength alloys.
Verify dimensions, inspection requirements and traceability before final acceptance.
For aerospace, turbine and other safety-critical components, follow the approved engineering specification and qualified manufacturing procedures.
Standards and Related Designations
| Designation System | Related Reference |
|---|---|
| AFNOR-related designation | Z12NCT25 — verify against the governing standard |
| Common alloy family | A286 |
| UNS | S66286 |
| EN material number | 1.4980 |
| Related EN designation | X5NiCrTi26-15 |
| ASTM / aerospace specifications | Confirm the exact specification according to product form and application |
Different standards may specify different chemistry limits, mechanical properties, heat-treatment conditions and inspection requirements. Similar grade names do not guarantee complete interchangeability.
Applications
Aerospace Engineering
Selected components that require high strength and reliable performance under demanding mechanical and thermal conditions.
Gas Turbines and Power Generation
Turbine-related components and other equipment exposed to elevated temperatures and mechanical loads, where the alloy is approved for the application.
High-Temperature Fasteners
Bolts, studs and other fastening components designed for specified elevated-temperature service.
Industrial Machinery
Specialized parts used in machinery that operates under high mechanical stress or thermal exposure.
Precision Engineering
Components requiring controlled material properties, heat treatment and traceability.
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