1.4825 (EN 10295 standard, grade GX25CrNiSi18‑9) is an austenitic heat-resistant cast stainless steel specially designed for high-temperature, heavy-load and corrosive environments. With its balanced chemical composition and stable microstructure, it has become the preferred material for high-temperature wear-resistant parts in metallurgy, energy, chemical engineering and other industries. It provides excellent heat resistance, wear resistance and corrosion resistance in long-term high-temperature service.
I. Core Material Properties (Composition & Microstructure)
The performance of 1.4825 comes from its precise chemical composition and stable austenitic matrix, in full compliance with European standard EN 10295.
High Chromium (17–19%): Forms a dense and continuous Cr₂O₃ protective film on the surface, isolating oxygen and corrosive media, delivering outstanding high-temperature oxidation resistance. It can operate steadily at 900℃ (1173K) for long-term service and withstand short-term temperatures above 1000℃ (1273K).
Medium Nickel (8–10%): Stabilizes the austenitic matrix, ensuring no phase transformation and stable dimensions at high temperatures. It also improves high-temperature toughness and thermal shock resistance against frequent thermal cycling.
Silicon (0.5–2.5%): Enhances the stability of the oxide film, especially improving resistance to high-temperature corrosion in sulfur-containing and dust-laden atmospheres, ideal for industrial furnaces and incinerators.
Carbon (0.15–0.35%): Forms dispersed Cr₂₃C₆ carbides, significantly increasing high-temperature strength, creep resistance and wear resistance without sacrificing toughness.
II. Key Advantages: Heat Resistance, Wear Resistance & Corrosion Resistance
1. Excellent High-Temperature Stability & Creep Resistance
Long-term service temperature up to 900℃, short-term peak up to 1000℃.
High creep and rupture strength under high-temperature and heavy-load conditions; no deformation or sagging during long-term use.
Outstanding thermal fatigue resistance and thermal cracking resistance, suitable for frequent heating and cooling cycles.
2. Superior Wear & Erosion Resistance
Carbide strengthened phase with high hardness matrix (HB 180–220) provides much better wear resistance than ordinary heat-resistant steels under high-temperature dry friction and particle erosion, extending service life by 2–3 times.
Dense surface oxide film provides a self-lubricating effect, reducing material adhesion and abrasion, ideal for grates, liner plates, baskets and other wear-prone parts.
3. Comprehensive Corrosion Resistance
Excellent resistance to high-temperature sulfur-containing, chlorine-containing, dust-laden flue gas and slag corrosion.
Effectively resists high-temperature oxidation, sulfidation corrosion and erosion corrosion.
Good acid and alkali corrosion resistance for high-temperature corrosive environments in chemical and environmental protection industries.
4. Good Casting & Machining Adaptability
Good fluidity of austenitic matrix, excellent precision casting performance for complex components such as special-shaped grates and combined liner plates.
Acceptable weldability and machinability for convenient on-site installation, repair and adjustment.
III. Typical Applications (Core High-Temperature & Wear-Resistant Fields)
Metallurgy & Heat Treatment Industry
Heat treatment furnaces: furnace baskets, trays, guide rails, furnace base plates, support rings.
Heating / annealing furnaces: furnace liners, door components, radiant tubes, furnace rolls.
Energy & Boiler Industry
Power station & industrial boilers: furnace grates, anti-wear shrouds, water wall liners, burner nozzles.
Waste incinerators: grate bars, furnace liners, slag discharger parts.
Chemical & Environmental Protection Equipment
Chemical heating / cracking furnaces: high-temperature pipes, valves, reactor liners.
Cement & building material kilns: preheater liners, kiln inlet protection plates, cooler parts.
Other High-Temperature Wear-Resistant Scenarios
Non-ferrous metal smelting: furnace liners, launders, hoppers.
Ceramic & glass kilns: high-temperature bearing parts, conveyor rolls.
IV. Comparative Advantages of 1.4825 Over Similar Grades
Compared with 1.4776, 1.4823 and 1.4865, 1.4825 stands out for its well-balanced performance:
vs 1.4776: Higher high-temperature strength and creep resistance for higher-temperature and heavy-duty conditions.
vs 1.4823: Better toughness and thermal shock resistance, reducing thermal fatigue cracking.
vs 1.4865: More cost-effective while satisfying most high-temperature wear applications below 900℃.
Choose Qingyun Hongsheng Machinery for Premium Heat & Wear Resistant Castings
Qingyun Hongsheng Machinery Parts Co., Ltd. specializes in the R&D, production and export of heat and wear resistant castings. We supply a full range of European standard castings including grades 1.4776, 1.4823, 1.4825 and 1.4865, covering furnace grates, liner plates, furnace components, boiler parts and various custom high-temperature wear parts.
The company strictly follows European material standards and quality systems, implementing full-process quality control from raw material smelting, precision casting and heat treatment to finish machining. We ensure every 1.4825 casting features accurate dimensions, stable performance and long service life. With mature technology, on-time delivery and professional foreign trade service, our products have long been exported to Germany and European markets, winning consistent recognition from overseas customers.
Custom designs based on drawings and samples are warmly welcome. We provide professional high-temperature working condition solutions and cost-effective products.
Qingyun Hongsheng Machinery Parts Co., Ltd.
Website: https://www.hsmachineryparts.com
Email: Hongsheng@hsmachineryparts.com
