fémtisztaságú

Fémtisztaságú is a Hungarian adjective used to describe a material that has a high degree of metal purity. It is commonly employed in metallurgy, materials science and industry to indicate that a sample consists predominantly of the specified metal with only trace impurities.

Purity is usually expressed as a mass fraction, i.e., a percentage or parts per million (ppm). Common high-purity grades are 99.9% (3N), 99.99% (4N), and 99.999% (5N), but fémtisztaságú is not itself a formal standard grade; the exact level should be defined in the product specification or by the issuing standard.

A limitation of the term is that it does not specify which impurities are present. Two materials described as fémtisztaságú with the same numerical purity can exhibit different properties depending on the identity and distribution of the impurities. Detailed impurity profiles are often provided alongside purity claims to address this ambiguity.

In practice, the qualifier appears in procurement documents, labeling, quality control, and scientific writing as a qualitative descriptor when a formal grade is unnecessary or unspecified. For formal engineering or laboratory work, purity levels are defined by applicable standards (ISO, EN, ASTM) for each metal and application, ensuring reproducibility and compatibility with performance requirements.

Overall, fémtisztaságú communicates a high degree of metal purity in a descriptive manner, while precise specifications rely on explicit impurity profiles and recognized standards.