SGHYZ High-Temperature Heating Alloy: A Kanthal A1 Alternative for Long-Life Heating Solutions in Energy Storage

2026-08-12

As the new energy storage industry scales up rapidly, scenarios such as high-temperature molten salt storage, solid-state thermal storage, phase change energy storage and electrochemical storage thermal management impose strict requirements on the temperature rating, cycle life and long-term stability of core heating elements. Premium energy storage systems are generally designed for a service life of over 20 years, and the reliability of heating elements directly determines operating costs and system availability.

For a long time, imported FeCrAl materials such as Kanthal A1 have been the benchmark in this sector. Founded in 1956, SPARK by Shougang Gitane boasts 70 years of expertise in heating alloy R&D. Our 3rd-generation SGHYZ high-temperature heating resistance alloy delivers performance on par with Kanthal A1. With a 1400°C temperature rating, excellent oxidation resistance and long-term stability, it serves as a highly reliable import alternative for the global energy storage industry.

Key Challenges for Heating Elements in Energy Storage

Heating units in energy storage systems generally face three major operating challenges. First, long-term continuous operation with frequent charge-discharge cycles subjects elements to repeated thermal shock. Conventional FeCrAl materials are prone to oxide film spalling and accelerated oxidation, leading to dramatically shortened service life. Second, the trend toward high power density designs requires heating elements to withstand higher surface loads, demanding superior high-temperature creep resistance. Third, low maintenance requirements — energy storage stations are often located in remote areas, requiring heating elements with ultra-long service life to minimize downtime for replacement.

The core performance advantages of SGHYZ

SGHYZ is an independently developed 3rd-generation ultra-high-temperature FeCrAl alloy. Its smelting and manufacturing technology has been granted a national invention patent (Patent No. ZL201910173874X), delivering upgraded purity and performance based on the 2nd-generation HRE alloy.

Through specially formulated micro-alloying and a unique metallurgical process, material purity is greatly improved and impurity segregation is significantly reduced. At elevated temperatures, it forms a dense, strongly adherent alumina protective film that resists thermal shock spalling and medium erosion.

Key performance parameters benchmarked against Kanthal A1 include: maximum service temperature of 1400°C, resistivity of 1.45 ± 0.07 μΩ·m at 20°C, annealed tensile strength of 650–800 N/mm², and rapid life test result of over 80 hours at 1350°C (GB/T 13300-91 compliant). Featuring minimal high-temperature creep, low resistance drift and excellent formability, it fully meets the long-cycle, high-load requirements of energy storage applications.

Four Core Applications in Energy Storage

1. High-Temperature Molten Salt & Solid Thermal Storage Systems

In CSP plants and grid-side long-duration thermal storage projects, electric heating units operate continuously at 800–1200°C with daily charge-discharge cycles. SGHYZ’s outstanding thermal shock resistance and high-temperature oxidation resistance significantly extend element service life, reduce maintenance costs and improve annual system availability, making it an ideal material for heating elements in high-temperature thermal storage furnaces.

2. Phase Change Energy Storage Heating Units

Industrial waste heat recovery and building phase change energy storage systems undergo frequent temperature fluctuations and medium-temperature continuous operation. The dense protective oxide layer of SGHYZ resists cracking and spalling after repeated thermal cycles, with long-term stable resistivity that ensures consistent charge-discharge efficiency across cycles, matching the long-life design requirements of phase change storage systems.

3. Electrochemical Energy Storage Station Thermal Management

Large-scale electrochemical energy storage stations require low-temperature heating and insulation systems to maintain battery efficiency and safety in extreme environments. With a high-purity matrix and stable performance, SGHYZ adapts to the 20+ year design life of energy storage stations, and its maintenance-free characteristics greatly reduce total project lifecycle costs.

4. Off-Peak Power Thermal Storage Boilers

Grid-side off-peak power thermal storage boilers generally adopt high power density designs. SGHYZ features excellent high-temperature strength and creep resistance, supporting higher surface loads and enabling more compact equipment integration. Meanwhile, its long service life reduces consumable replacement costs and improves the economics of peak-shaving thermal storage projects.

As a national-level "Little Giant" enterprise and national green factory, Shougang Gitane has led the formulation of all national electric heating alloy standards in China and holds 72 independent patents.

Benchmarked against Kanthal A1, SGHYZ high-temperature heating alloy combines stable quality and localized technical support. We supply full-specification wires and strips as well as customized heating material solutions for global energy storage customers, supporting cost reduction and reliable operation of energy storage systems.

Click here to contact us for more information