Product Introduction
The GX25CrNiSi20-14 heat treatment basket produced by our company is a high-performance heat-resistant steel basket specifically designed for demanding high-temperature industrial processes. This heat treatment basket is manufactured from high-quality 1.4832 austenitic heat-resistant cast steel, exhibiting excellent thermal stability, oxidation resistance, and mechanical strength in continuous high-temperature environments up to 950°C. Widely used as heat treatment tooling in processes such as annealing, quenching, tempering, nitriding, carburizing, and solution treatment, this heat treatment tray ensures durable and reliable workpiece loading in industrial furnaces. The GX25CrNiSi20-14 material basket combines superior material properties with precision casting technology to meet the stringent requirements of modern heat treatment workshops.
Key Applications
- Heat Treatment Industry： Annealing furnace baskets, quenching furnace trays, tempering furnace baskets, carburizing furnace baskets, nitriding furnace baskets, and solution treatment baskets
- Industrial Furnaces： Pit-type furnace trays, car-bottom furnace baskets, bell-type furnace baskets, sealed quench furnace baskets, roller hearth furnace baskets, continuous furnace baskets, and vacuum furnace baskets
- Case Hardening & Ferritic Nitrocarburizing： Workpiece carriers for controlled atmosphere heat treatment
- Metallurgical Processing： Heat treatment of forgings, castings, automotive components, aerospace parts, and fasteners
Technical Specifications
Chemical Composition (%)：
| C | Si | Mn | Cr | Ni | P | S | Mo |
| 0.15-0.35 | 0.5-2.5 | ≤2.0 | 19.0-21.0 | 13.0-15.0 | ≤0.04 | ≤0.03 | ≤0.5 |
- Composition specifications according to EN 10295：2002.
Mechanical Performance
| Property | Value |
| Tensile Strength (Rm) | ≥450 MPa |
| 0.2% Proof Strength (Rp₀.₂) | ≥230 MPa |
| Elongation at Fracture (A) | ≥10% |
| Elastic Modulus (@23°C) | 195 GPa |
| Hardness | Typical austenitic stainless steel range |
- Data based on GX25CrNiSi20-14 standard specifications.
Maximum service temperature by atmosphere：
| Atmosphere | Maximum Temperature |
| Oxidizing Combustion Atmosphere | 1000°C |
| Reducing Combustion Atmosphere | 950°C |
| Oxidizing Sulfur-Containing Gases | 900°C |
- Operating temperature limits vary depending on furnace atmosphere conditions.
Product Advantages
Superior High-Temperature Oxidation Resistance
The GX25CrNiSi20-14 heat resistant casting steel contains 19-21% chromium and 13-15% nickel, forming a dense, self-healing Cr₂O₃ oxide layer on the surface. This protective scale effectively prevents further oxidation, decarburization, and metal loss at elevated temperatures, ensuring long-term service life in oxidizing, carburizing, and mildly corrosive furnace atmospheres.
Excellent Thermal Fatigue Resistance
The austenitic microstructure of this 1.4832 material basket provides outstanding resistance to thermal cycling. The material accommodates thermal expansion differentials during repeated heating and cooling cycles without cracking or warping, making it ideal for batch-type furnaces, carburizing lines, and interrupted quench operations where thermal shock is a concern.
Outstanding Creep Resistance & High-Temperature Strength
With a tensile strength exceeding 450 MPa at room temperature and reliable performance up to 950°C, the GX25CrNiSi20-14 heat treatment basket maintains dimensional stability and load-bearing capacity under sustained high-temperature exposure. The 1% creep limit after 10,000 hours at 900°C remains 10 N/mm², demonstrating exceptional creep resistance for long-duration cycles.
Exceptional Resistance to High-Temperature Carburizing & Oxidation
The combination of high nickel content and controlled silicon addition provides enhanced resistance to carbon diffusion into the metal matrix. This heat treatment tooling resists metal dusting, offers excellent stability in carburizing environments, and prevents performance degradation from long-term exposure to carbon-rich furnace atmospheres.
Consistent Performance Across Multiple Thermal Cycles
The austenitic structure of GX25CrNiSi20-14 remains stable throughout repeated heat treatment operations, avoiding detrimental phase transformations that cause embrittlement or property degradation. This ensures predictable, repeatable performance over the entire service life of the basket.
Minimal High-Temperature Scaling & Extended Service Life
The optimized chromium-to-nickel ratio promotes formation of a tightly adherent oxide layer with minimal spalling, significantly reducing metal loss from high-temperature scaling. This extends service life compared to lower-alloyed materials, lowering total cost of ownership and reducing furnace downtime for basket replacement.
Manufacturing Process
Our GX25CrNiSi20-14 heat resistant steel baskets are produced using state-of-the-art precision casting processes：
Lost Wax Investment Casting
Delivers excellent surface finish, tight dimensional accuracy, and complexity in design
Silica Sol Casting Process
Provides superior surface quality and fine detail reproduction
EPC (Expendable Pattern Casting) Process
Ideal for large-scale production with consistent quality
- All castings undergo rigorous quality control including chemical composition verification, dimensional inspection, and optional non-destructive testing. Heat treatment and machining can be provided to meet finished component specifications.
Our Company Strengths
Choose the Manufacturer That Best Fits Your Needs
Industry experience
With over 20 years of specialized experience in high-alloy casting production, we have become a trusted heat-resistant steel casting manufacturer, providing optimal heat treatment tooling to customers in more than thirty different countries.
Material expertise
We maintain a comprehensive understanding of heat-resistant alloys, including GX25CrNiSi20-14 (1.4832), GX40CrNiSi25-12, GX40CrNiSi25-20 (1.4848), GX40CrNiSi35-25, and many other EN, DIN, ASTM, and GB standard grades.
Precision casting capabilities
Our advanced foundry is equipped with multiple casting processes, including investment casting, silica sol casting, sand casting, and EPC (expendable pattern casting). This flexibility ensures the optimal production method matched to your specific requirements.
Custom manufacturing
We specialize in custom heat treatment tooling based on customer drawings, specifications, or finished part samples. Whether you need a single prototype or large-scale production, we provide design support, process optimization, and consistent quality throughout the entire manufacturing cycle.
Finished drawing of heat treatment tooling fixture
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