The naming rules of special bronze alloy grades have undergone many changes in history to adapt to technological development and standardization needs. Here are some specific examples of changes:
From chemical composition to numerical system: Early alloy grades may be named mainly based on the chemical composition of the alloy, such as "bronze with 8% tin content". With the development of materials science, many alloy grades now adopt numerical systems, such as the numbers in ASTM, DIN and GB/T standards.
Introduction of UNS numbers: The Unified Numbering System (UNS) is a material numbering system jointly developed by ASTM and SAE, which provides a unique identification code for each material. For example, C95400 is the number representing tin bronze in the UNS system.
The influence of the International Organization for Standardization (ISO): With the promotion of ISO standards, standard organizations in many countries have begun to adopt or refer to ISO's naming rules, which may lead to the update or replacement of the original grades.
Reclassification of alloying elements: With a deeper understanding of the role of alloying elements, the classification and naming of some elements may change. For example, some alloys that were previously classified as "ordinary bronze" may now be reclassified and named based on their special properties.
Impact of environmental regulations: Changes in environmental regulations may result in restrictions on the use of certain alloying elements, which in turn may affect alloy grades. For example, leaded bronze alloys may be restricted or replaced in certain applications, resulting in changes in grades.
Emphasis on performance characteristics: As the requirements for alloy performance increase, grades may place more emphasis on specific properties of the material, such as "high-strength bronze" or "corrosion-resistant bronze".
Integration of regional standards: With the development of globalization and international trade, standards in different regions may tend to integrate, resulting in the unification or updating of grade naming rules.
Reflection of user needs: User demand for specific properties may lead to the reformulation of alloys and the updating of grades to better reflect their application characteristics.
Advances in material processing technology: New processing technologies may improve the properties of certain alloys, requiring the grades to be updated to reflect these changes.
The impact of digitalization and informatization: With the digitization of material information, the grade naming rules may need to be updated to adapt to new data management systems and databases.
These change cases show that the naming rules of special bronze alloy grades are a dynamic process that needs to be constantly adapted to technological advances, market demands and regulatory requirements. It is very important to understand the latest grade naming rules during material selection and application.