Overview of ASTM B365 polished round tantalum bar stock pure tantalum per kg
Metal powder is a common form of metal that has been processed into fine particles, ranging from a few micrometers to over 100 microns in diameter. It plays a crucial role in various industrial applications due to its unique properties and versatility.
Features of ASTM B365 polished round tantalum bar stock pure tantalum per kg
Physical Characteristics
Particle Size: Ranging from nanometers to hundreds of micrometers, the size distribution significantly influences the powder’s flowability, packing density, and sintering behavior.
Shape: Particles can be spherical, irregular, flake-like, or dendritic, each shape affecting the final product’s mechanical properties and surface finish.
Purity: Depending on the production method, metal powders can achieve high levels of purity, critical for applications like electronics and aerospace where impurities can degrade performance.
Density: While less dense than their solid counterparts due to the presence of air between particles, metal powders can be densely packed during processing to approach the density of the solid metal.
Chemical Properties
Reactivity: Some metal powders, particularly aluminum and titanium, are highly reactive with air and moisture, necessitating careful handling and storage under inert atmospheres or vacuum.
Oxidation: Exposure to air can lead to surface oxidation, forming a passive layer that affects sintering and other processes. This can be managed through surface treatment or use of protective atmospheres.
(ASTM B365 polished round tantalum bar stock pure tantalum per kg)
Parameters of ASTM B365 polished round tantalum bar stock pure tantalum per kg
ASTM B365, also known as the “Standard Specification for Cold-Worked and Polished Tantalum Bar Stock,” is a widely recognized industry standard that specifies the requirements for high-quality tantalum bars used in various applications. Tantalum, a chemical element with the symbol Ta and atomic number 73, is a rare, lustrous transition metal known for its exceptional strength, corrosion resistance, and high melting point. It is often employed in demanding environments where durability, stability, and performance are paramount.
The B365 specification covers tantalum bars that have undergone specific manufacturing processes to achieve a polished finish. This includes cold working, which enhances the mechanical properties by deforming the material at room temperature, followed by a meticulous polishing step to produce a smooth surface finish. The polished round tantalum bars are characterized by their uniformity in dimensions, straightness, and absence of defects such as cracks, scratches, or inclusions.
The parameter you mentioned, “per kg,” refers to the pricing or weight-based quantity, typically expressed in kilograms. The price of these bars would depend on factors such as purity, diameter, length, and the specific grade of tantalum (e.g., pure tantalum or an alloy). Pure tantalum bars, with a purity level of 99.95% or higher, command a premium due to their superior properties and limited availability compared to alloys.
Tantalum’s high melting point of around 3017°C (5450°F) makes it suitable for use in extreme heat conditions, while its low coefficient of thermal expansion ensures minimal dimensional changes under varying temperatures. This property is crucial in applications like aerospace, nuclear power, and semiconductor industries, where thermal stability is essential.
The polished finish on ASTM B365 tantalum bars also contributes to enhanced surface integrity, which is vital in parts that require intimate contact with corrosive environments or require precise alignment. These bars are often used in components such as electrical contacts, capacitors, and chemical processing equipment where a clean, non-reactive surface is necessary.
In conclusion, ASTM B365 polished round tantalum bar stock represents a high-quality material choice for engineers and manufacturers seeking a durable, corrosion-resistant component with exceptional performance characteristics. The price per kilogram is influenced by the material’s purity, manufacturing process, and the specific application requirements. With its unique properties, tantalum finds its way into critical applications where reliability and longevity are of utmost importance.
(ASTM B365 polished round tantalum bar stock pure tantalum per kg)
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