ThePipingMart Blog Grades UNS R04210 Niobium – Composition, Properties and Uses

UNS R04210 Niobium – Composition, Properties and Uses

UNS R04210

UNS R04210, also known as pure titanium grade 1, is a commercial unalloyed titanium grade. It is the first and lowest strength among all titanium alloys and contains a small percentage of impurities. The material is widely used in various industrial applications because of its exceptional corrosion resistance, high strength-to-weight ratio, and excellent mechanical properties. In this blog post, we will discuss in detail the composition, physical and mechanical properties, applications, heat treatment, and welding techniques of UNS R04210.

UNS R04210 Composition

UNS R04210 comprises at least 99.5% pure titanium and trace amounts of other elements such as oxygen, iron, carbon, and nitrogen. The presence of these impurities is less than 0.5%, making it a highly pure form of titanium. The material is also non-magnetic, non-toxic, and has excellent biocompatibility properties.

UNS R04210 Physical Properties

UNS R04210 has remarkable physical properties. It has a density of 4.51 g/cm3, almost half the weight of stainless steel. The material has a melting point of 1668°C, making it suitable for high-temperature applications. It also has a low coefficient of thermal expansion, meaning it can withstand temperature changes without deforming.

Properties Metric Imperial
Density 8.57 g/cm³ 0.310 lb/in³
Melting point 2415°C 4380°F

UNS R04210 Mechanical Properties

The mechanical properties of UNS R04210 are equally impressive. The material has a minimum yield strength of 170 MPa and an ultimate tensile strength of 240 MPa. Additionally, it has an elongation of 24%, meaning it can stretch without breaking. The material also has excellent fatigue, creep, and fracture toughness properties.

Properties Metric Imperial
Tensile strength 275 – 585 MPa 39900 – 84800 psi
Yield strength (@ strain 0.200%) 207 MPa 30000 psi
Modulus of elasticity 103 GPa 14900 ksi
Elongation at break 5-30% 5-30%
Hardness, Vickers 80 – 120 80 – 120

UNS R04210 Thermal Properties

Thermal Properties Metric Imperial
Thermal conductivity 52.3 W/mK 363 BTU in/hr. ft².°F

UNS R04210 Equivalent

  • ASTM B391
  • ASTM B392
  • ASTM B393
  • ASTM B394

UNS R04210 Uses

UNS R04210 has many applications, including aerospace, biomedical implants, chemical processing, marine, and architecture. The material is widely used in aerospace because of its high strength-to-weight ratio and ability to withstand extreme temperatures. It is also used in biomedical and dental implants because of its excellent biocompatibility properties.

UNS R04210 Hardness

UNS R04210’s hardness varies depending on the method of manufacturing. The material can range from soft and easily workable to hard and brittle. It is important to note that when the material has been cold-worked, its hardness increases and becomes more challenging to machine.

UNS R04210 Heat Treatment

UNS R04210 can be heat-treated to enhance its mechanical properties. The material can be hardened to 800°C-900°C and quenched in cold water. Another method is to anneal the material by heating it to 500°C-600°C and then allowing it to cool slowly. These methods change the microstructure of the material, improving its mechanical properties.

UNS R04210 Welding

UNS R04210 can be welded using techniques such as TIG (tungsten inert gas), MIG (metal inert gas), and plasma arc welding. However, since the material is highly pure, it is susceptible to contamination. Therefore, it is crucial to use a high-quality welding wire and ensure the welding environment is free from any impurities.

UNS R04210 Corrosion Resistant

UNS R04210 is highly resistant to corrosion, especially in chloride-containing environments, making it perfect for marine and chemical processing industries. However, the material is not resistant to some acids, such as hydrochloric acid and sulfuric acid, and should be avoided in such conditions.


UNS R04210 is a highly pure titanium grade with exceptional physical and mechanical properties. The material is highly versatile and can be used in various industrial applications. Its corrosion resistance properties make it perfect for marine and chemical processing industries. Its ability to withstand high temperatures and excellent biocompatibility properties make it suitable for aerospace and medical applications. Heat treatment can be used to enhance its mechanical properties, and welding techniques such as TIG and MIG can be used to join the material. When selecting UNS R04210, it is crucial to consider its composition, physical and mechanical properties, and corrosion resistance properties.

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