From Laboratory to Industry: Why Nickel-based Steel Has Become a "High-end Manufacturing Demand"
In the production workshop of Zhangxuan Technology under HBIS Group, polished metal blocks labeled "GH3625" undergo rigorous quality inspections before being shipped to high-end equipment manufacturers in Jiangsu. "This isn't ordinary steel—it's a nickel-based alloy called 'Golden Baby,' valued at 200,000 yuan per ton," said Su Aimin, the chief engineer of the technical department, his pride evident. This nickel-centric specialty steel quietly underpins the development of strategic industries like aerospace, nuclear energy, and new energy, emerging as an indispensable 'super metal' in modern industrial systems.
Deciphering Nickel-based Steel: The "Performance King" Created by Element Ratio
Nickel-based steel (nickel-based alloy) is a special type of steel primarily composed of nickel (typically with a content exceeding 50%), supplemented by alloying elements such as chromium, iron, molybdenum, and titanium. Compared to ordinary carbon steel, its performance advantages are truly "dominant," primarily attributed to precise element ratios and stringent smelting processes:
- Extreme environmental 'survival capability': Capable of maintaining structural stability in extreme temperatures ranging from-200°C to 1200°C, it can be used as 9% Ni steel for LNG Storage Tanks and withstands the continuous high temperatures in aviation engine combustion chambers.
- Exceptional corrosion resistance: The stable oxide layer formed by nickel resists corrosive media including marine salt spray, chemical acids and alkalis, and high-temperature/high-pressure water from nuclear reactors. In the chemical industry, Hastelloy C276 alloy outperforms conventional steel by over 10 times in service life.
- Mechanical Performance: The 'All-Rounder' -Engineered with Inconel 718 alloy, this turbine disk for aero-engines combines exceptional strength, toughness, and fatigue resistance, capable of withstanding thousands of revolutions per second and repeated thermal cycling.
- The adaptability of precision machining: good weldability and machinability, which can be made into sheet metal, pipe, forging and so on, to meet the complex manufacturing needs of precision instruments and large equipment.
Notably, these properties are not isolated but form a synergistic advantage. For instance, the 690 alloy commonly used in nuclear power plants, with its precise 60% nickel and 30% chromium composition, effectively addresses stress corrosion while maintaining high-temperature strength, making it the preferred material for heat transfer tubes in steam generators in newly built nuclear power plants worldwide.
II. Material Revolution: From Aerospace to Healthcare
Nickel-based steel has expanded its applications far beyond traditional heavy industries, now playing a pivotal role in modern industrial sectors as a key component in technological breakthroughs.
- In the aerospace field: accounting for 60% of the structural materials in aero-engines, core components such as combustion chambers, guide vanes, and turbine disks all rely on Inconel series nickel-based alloys, whose high-temperature performance directly determines engine thrust and lifespan. The development of China's new-generation fighter jets cannot be achieved without technological breakthroughs in domestically produced high-end nickel-based alloys.
- Energy sector: In the nuclear energy field, key components such as in-reactor structures and control rod actuation mechanisms are made of nickel-chromium-iron ternary alloys to ensure the safe operation of nuclear reactors. In the new energy sector, nickel-based steels are required for wind turbine tower flanges, hydrogen storage and transportation equipment, and LNG receiving station tanks to withstand extreme operating conditions. By 2025, China's demand for 9% Ni steel used in LNG Storage Tanks alone will account for 42% of the global total.
- In high-end manufacturing, the Fuxing high-speed train's bogies utilize Ni-Cr-Mo alloy steel, extending service life by 35%. Tesla's Model Y features a rear subframe made of novel nickel-reinforced stainless steel, achieving 18% weight reduction while enhancing safety performance. For offshore engineering equipment, nickel-based steel resists deep-sea high pressure and corrosion, significantly prolonging platform service life.
- In the medical field: Due to their biocompatibility and mechanical adaptability, nickel-based alloys are used to manufacture vascular stents, cardiac valves, orthopedic fixation devices, etc. Among these, nickel-titanium alloys for orthodontic wires, which possess both elasticity and shape memory properties, have become a commonly used material in dental medicine.
III. China's Industrial Breakthrough: From "Following" to "Running Side by Side" in Technological Breakthrough
The development of China's nickel-based steel industry can be described as a history of "thousands of hammerings and tempering" in overcoming challenges. In the 1950s, domestic nickel steel production relied on imported raw materials and foreign technology. It was not until 1958, when Fushun Special Steel completed its first production line, that a breakthrough from scratch was achieved. Today, facing the dilemma of a nickel ore self-sufficiency rate of less than 10% and being "strangled" by high-end technologies, Chinese enterprises have joined the global first echelon through technological innovation and industrial chain integration.
In the workshop of Zhangxuan Technology under HBIS Group, "thousands of hammerings" is both a portrayal of the process and a microcosm of R&D. "The so-called 'thousands of hammerings' refers to the refinement of microstructure using a 45-meganewton fast forging machine, while 'hundreds of hammerings' involves high-temperature purification in a vacuum self-consumption furnace to remove impurities," explained Su Aimin. To overcome the challenge of iron element control in GH3625 alloy, the team conducted dozens of trial productions and ultimately managed to keep the iron content below 0.3%, far exceeding the national standard limit of 5%. This relentless pursuit of technical excellence is precisely the key to China's breakthrough in nickel-based steel:
- Process innovation: The widespread adoption of the RKEF (rotary kiln-electric furnace) and AOD (argon-oxygen decarburization) combined smelting process has significantly boosted the yield of high-purity nickel steel. Meanwhile, explorations into low-carbon technologies like short-process smelting and hydrogen metallurgy are expected to reduce carbon emissions per unit product by over 20%.
- Industrial chain integration: Industry leaders including Qingshan Holding and Taiyuan Iron & Steel Group have established a full-chain production system covering nickel ore, nickel iron, stainless steel, and deep processing. By strategically deploying overseas resources, they reduce reliance on imported raw materials. By 2025, China's domestic consumption of nickel steel is projected to exceed 18 million tons.
- Breakthrough in High-End Technologies: Targeting critical sectors like aviation engine turbine disks, China has launched a national initiative to promote domestic substitution, aiming for 80% localization by 2027. The technology has already been implemented in multiple key aircraft models.
IV. Future Outlook: Dual Drive of Green Transformation and High-end Upgrade
Looking ahead to 2026-2030, China's nickel steel industry will enter a stage of high-quality development, with the market size expected to grow at an average annual rate of 5.2%, and the total output value is expected to exceed 420 billion yuan by 2030. The industry development will present two core trends:
- Green and low-carbon transition: Under the guidance of the "dual carbon" strategy, the dual control of energy consumption and capacity replacement policies will accelerate the elimination of outdated production capacity, with an expected elimination rate exceeding 30% by 2027. Technologies such as scrap steel recycling and hydrogen-based shaft furnace smelting will reduce raw material consumption and carbon emissions, driving the industry's transition toward green manufacturing.
- Product structure upgrade: With the expanding demand in emerging fields such as new energy vehicles, hydrogen energy, and advanced nuclear power, nickel-based alloys with high nickel content, high purity, and customization will become the focus of R&D. The regional clustering characteristics of industrial clusters will become more pronounced, with the three major bases in Guangxi, Fujian, and Jiangsu contributing over 60% of the national production capacity.
- Application boundary expansion: In extreme working conditions such as deep-sea equipment, interstellar exploration, and ultra-large chemical equipment, the performance of nickel-based steel will continue to break through, becoming a crucial support for cutting-edge technological innovation.
From the first production line of Fushun Special Steel to today's global manufacturing hub, from ordinary alloy steel to "bottleneck" high-end materials, the development of China's nickel-based steel industry is not only a progress in material science but also a microcosm of China's manufacturing upgrading. Just like those nickel-based steels that have been tempered through countless trials, only by enduring the refinement of technological breakthroughs can they support the "bones" of high-end manufacturing, injecting a continuous "metallic strength" into the high-quality development of the industry.
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