Titanium

Titanium is a remarkable metal known for its exceptional strength, light weight, and corrosion resistance. As strong as steel but 45% lighter, it is ideal for applications where weight and durability are crucial, such as in aerospace, automotive, offshore and marine industries. Its resistance to seawater and chemicals makes it suitable for aerospace, offshore and chemical applications.
There are various grades of pure titanium (Titanium grades 1, 2, 3, 4, 7, and 11), each offering varying degrees of strength and ductility.
Additionally, there are several types of titanium alloys with enhanced mechanical and corrosion resistant properties. The most famous are: Titanium Grade 5 (Ti 6AL-4V), Titanium Grade 6 (Ti 5Al-2.5Sn), Titanium Grade 9 (Ti 3Al 2.5V), Titanium Grade 12, and Titanium Grade 23 (Ti 6AL 4V ELI). These alloys often incorporate elements like palladium, aluminum, vanadium, molybdenum, and others, making them suitable for specialized applications.

Austenitic Stainless Steel

Austenitic steel alloys are a class of stainless steel known for their excellent corrosion resistance, high ductility, and non-magnetic properties. Comprising mainly iron, chromium (16-26%), and nickel (6-22%), they are extensively used in demanding environments. These steels are highly resistant to various corrosive environments, making them ideal for applications in the offshore industry, chemical processing, maritime and aerospace sectors.
Austenitic steels also retain their strength and corrosion resistance at high temperatures, making them perfect for high-temperature applications.
Common grades include 304, known for its good corrosion resistance and weldability; 316, which offers enhanced resistance against chlorides; 321, similar to 304 but with added titanium for better stability at high temperatures; and 317, which contains higher molybdenum for greater corrosion resistance. Overall, austenitic steel alloys are versatile and essential materials across various industries.

Aluminum

Aluminum is a lightweight, corrosion-resistant metal with excellent strength, making it ideal for a variety of industries. About one-third the weight of steel, it provides high strength while reducing overall weight, which is critical in sectors such as aerospace, automotive, and construction. Aluminum’s natural resistance to corrosion, including seawater and chemicals, ensures long-lasting durability in harsh environments.

Aluminum comes in various grades. 1050 and 1100 grades are highly corrosion-resistant and easy to work with. 2024 is a high-strength aluminum-copper alloy commonly used in aerospace, while 7075, a high-strength aluminum-zinc alloy, is often used in military and aerospace applications due to its strength.
These alloys are engineered to meet the specific needs of industries requiring durable, lightweight materials with excellent performance characteristics.

Zirconium

Zirconium is a ductile, malleable, and corrosion-resistant metal. Its chemical and physical properties are very similar to those of titanium, making it resistant to corrosion, especially at high temperatures, while being lighter than commonly used steels.
This metal exhibits high resistance to hydrochloric acid, sulfuric acid, and organic acids, with the latter making it even more resistant than steels, titanium, and nickel alloys.
Its most well-known alloy, Zircaloy (Zr>95%), is used in the offshore and nuclear industry, where for the latter the key requirement is not to absorb neutrons (low cross-section) to avoid reducing the criticality factor. Fuel rods, which contain sintered uranium oxide pellets, are made from Zircaloy.

Tantalum

Tantalum is an exceptional corrosion-resistance metal that is known also for its ductile properties and has strength similar to steel. Tantalum gets its corrosion resistance, like titanium and zirconium, by forming a passive oxide layer as it initially reacts with oxygen on the surface. It has similar elongation compared to titanium and twice the elongation of common titanium alloys.
In order to further improve strength, tantalum is alloyed with tungsten (Ta2.5W and Ta10W) and these alloys have strength and workability similar to or greater than that of steel. Tantalum alloys are easily worked into a variety of parts such as tubing, thermowells, heat exchangers, industrial chemical apparatus, missile and aircraft parts and surgical instruments. This metal can also be alloyed with other elements such as niobium and nickel based super alloys to increase its strength and temperature resistance. Adding niobium to tantalum, reduces weight and saves cost while maintaining good corrosion resistance.