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Aluminum Alloys

Aluminum Alloys

At Suniway, we recognize the exceptional properties of scandium when alloyed with aluminum, such as improved corrosion and salt resistance, enhanced weldability, excellent hydro-formability, and heat-working temperature, as well as superior anodization. These advantages make AlSc2% alloys increasingly popular in the aviation industry for various applications, including the production of aviation components. This trend is expected to significantly contribute to the revenue growth of the global scandium metal market over the next decade. 

Scandium-containing aluminum alloys have emerged as a compelling and competitive high-performance structural material, following the development of aluminum lithium alloys. The prospects for these alloys in high-tech sectors, including shipbuilding, aerospace, rocketry, and nuclear energy, are vast. By incorporating a small amount of scandium, a new generation of high-performance aluminum alloys, such as ultra-high strength and high-toughness aluminum alloys, as well as high-strength corrosion-resistant aluminum alloys, can be developed from existing aluminum alloys.

Solution for Weight Reduction in Automobiles

Market Demand

The global market for Aluminum Scandium alloys was valued at USD 1.3 billion in 2021 and is projected to grow at a CAGR of 4.7% from 2021 to 2030. The increasing demand in the automotive and aerospace industries is expected to be a key driver of this growth. The weight-to-strength ratio, corrosion resistance, and high melting point of aluminum scandium alloys make them highly desirable for various applications

Market Supply

Suniway is dedicated to supporting the growing demand for Aluminum Scandium master alloys. Our current production capacity stands at 500 tons per year. As market demand continues to rise, we are committed to expanding our production capabilities and significantly reducing production costs. We anticipate offering long-term supply contracts at more competitive prices, facilitating the broader adoption of Al-Sc alloys in the automotive sector and beyond.

Solution for weight reduction in the field of aviation and aerospace

The utilization of the highly durable and lightweight product as an ideal material for flooring, fire-resistant partitions, ceiling panels, interior decorative panels, etc., in electric trains and buses facilitates sound absorption, noise reduction, shielding, and fire protection.

Currently, it is applied to seven models of locomotives with speeds of 160, 200, and 300 km/h.

Solution for weight reduction in the field of rail transport

Key indexFoamed alloy composite panelWood floorFRP floorAluminum honeycomb floorRequirements for rail vehicles
Fireproof≧1100℃Not≧1000℃≧660℃≧600℃
Environ-mental-friendlyFullyNotNotFullyFully
Lightweight9.7kg/m220kg/m235kg/m215kg/m2≦10kg/m2
Compressive strength≧4 MPa≧4 MPa≧10 MPa≧2 MPa≧4 MPa
Bending strength≧180 MPa≧80MPa≧200 MPa≧100 MPa≧140 MPa
ConclusionOKNGNGNG

Solution for weight reduction in the field of sports and recreational equipment

Comparison of properties
Material TypeProperties
7A48ALightweight, high specific strength, excellent corrosion resistance
Carbon FiberLightweight, high axial tensile strength, poor impact resistance when folded, prone to brittle fracture
SteelHigh intensity, high toughness, corrodes rapidly

Carbon fiber is replaced by 7A48 aluminum alloy, which features better overall performance and shock resistance performance

Application Fields Outlook

Unmanned Vehicle Lightweight Application

7A48 aluminum alloy hollow profile and welding structure is adopted, reducing the weight of unmanned vehicles by 30%

Some Informations

Scandium has the atomic number 21 and is represented in the periodic table by the symbol ‘Sc’. Scandium is extracted from one of Scandinavia’s rare minerals. When exposed to air, it develops a yellowish or pinkish cast. Scandium has the property of easily tarnishing and burning when ignited. It will also dissolve in acids and react with hydrogen gas. Scandium is produced by heating scandium fluoride (ScF3) with calcium metal. This uncommon chemical can be found in household items such as glasses, energy-saving lamps, fluorescent lamps, and televisions.
 
Scandium powder is used in a wide range of applications. It has an atomic weight of 44,956 and an atomic number of 21. It is the twenty-first element of the periodic table and the first element of the transition group in the first long period; it has the isotopes 40 Sc and 51 Sc, as well as an intermediate value isotope known as 45 Sc; all of these isotopes are produced as a result of nuclear reactions. Scandium was discovered in 1879 by L.F. Nilson while conducting rare earth studies. It is a soft, white metal with silver tones that, when exposed to air, promotes the formation of a white nitride layer and, when exposed to water, burns, producing a flame with yellow and red tones. Scandium powder and some other scandium compounds are frequently used as catalysts in the conversion of acetic acid to acetone. It can also be used to improve the germination of vegetable seeds.
 
Scandium is a soft, silvery, yellow-white metal that belongs to Periodic Group 3 and is the leader of a group of ten metals known as the First Row Transition Elements. Scandium ranks 35th in terms of abundance in the Earth’s crust. It tarnishes in the air and burns easily once ignited. It reacts with water to produce hydrogen gas and dissolves in a variety of acids. Scandium is a very light metal with a relatively high melting point and good corrosion resistance. It is also a rare metal, not because it is difficult to find, but because it is difficult to find in a high concentration (i.e. an ore) and is thinly distributed around the world (0.0025% of the Earth’s crust), making collection and purification costly and time-consuming.
 

Scandium plays a critical role in high-performance industries, particularly in the aerospace and automotive sectors. Scandium is widely used in aluminum-scandium alloys, which are essential for manufacturing lightweight, durable components in aircraft, space vehicles, and automotive applications. These alloys offer superior strength-to-weight ratios, improved corrosion resistance, and enhanced weldability, making them ideal for cutting-edge aerospace and automotive technologies.

In addition to its alloying benefits, scandium is also pivotal in energy applications. Scandium-stabilized zirconia is used in Solid Oxide Fuel Cells (SOFCs) due to its excellent ionic conductivity and thermal stability, which are crucial for efficient energy generation.

Beyond these applications, scandium compounds have specialized uses in other advanced technologies. Scandium iodide is utilized in mercury vapor lamps, simulating natural sunlight for film and television studios. Scandium oxide (scandia) is employed in producing high-intensity “stadium” lights, while the radioactive isotope 45Sc serves as a tracing agent in oil refineries. Additionally, scandium sulfate in trace amounts can enhance the germination of seeds such as corn, peas, and wheat.

The two most promising applications for scandium are in solid oxide fuel cells (SOFCs) and scandium-aluminum alloys. Scandium is used extensively in SOFCs. Through continuous heat-producing internal reactions, these fuel cells can produce energy very cheaply and efficiently. SOFCs can be powered by cheap natural gas, and the total electricity generated by these cells costs only cents per kilowatt hour. Meanwhile, scandium-aluminum alloys show great promise in a variety of applications. This alloy is light and strong, and it can be used in airplanes and other high-performance applications. Scandium-aluminum alloys can also be used in 3D printing, which produces CAD models made entirely of metal. Scandium has a variety of other applications due to its lightness and strength. These are some examples: Ceramics: By combining about 20% scandium carbide and titanium carbide, a very hard mixed carbide can be produced. To put this in context, the material is only slightly softer than diamonds. Electronics: Scandium is an important constituent of the laser material gadolinium scandium gallium garnet (GSGG). GSGG is said to be three times more effective than a similar material made of yttrium and aluminum. Scandium can also be used in computer switches. To make these switches work, undulating light passes through garnet and microwave equipment. Lighting: The critical metal can also be used to make high-intensity lights that look like natural light. Scandium has a broad emission spectrum that is similar to sunlight and is used effectively for camera lighting as well as movie and television studio lights. Phosphorus and displays: Scandium compounds can act as a host for phosphorous, which is frequently the activator ion in TV and computer monitors, because scandium can activate red luminous material, which is useful in TV displays. However, due to the current high cost of scandium, this application is not widely used. Finally, scandium is very similar to yttrium in both composition and application. Given the likelihood that the world will face a yttrium shortage, scandium may find applications as a yttrium substitute in energy-efficient lighting systems and chemical refining technologies. In fact, scandium is more effective than yttrium in some cases. It is a better electrical conductor and is already known to perform well in high-performance lighting. Scandium is currently about 100 times the price of yttrium, but when the comparative benefits of scandium are considered, the cost disadvantage for the critical metal may be minimized.