What is ANSI H35.2 Standard and Why You Need It
Introduction
If you are involved in the production, fabrication, or use of aluminum mill products, you may have heard of ANSI H35.2 standard. But what exactly is this standard and why is it important for your business?
ANSI H35.2 is an American National Standard that specifies the dimensional tolerances for aluminum mill products, such as sheet, plate, foil, wire, rod, bar, tube, pipe, forgings, forging stock, and electrical conductors. It also defines the alloy designations and chemical composition limits for wrought aluminum and wrought aluminum alloys.
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This standard is essential for ensuring the quality, consistency, performance, and innovation of aluminum mill products and their applications in various industries, such as aerospace, automotive, construction, electrical, marine, packaging, etc.
In this article, we will explain the main features and benefits of ANSI H35.2 standard, and how you can access it online.
Main Features of ANSI H35.2 Standard
Alloy Designations and Chemical Composition Limits
One of the key features of ANSI H35.2 standard is that it provides a systematic and uniform way of identifying and classifying aluminum alloys based on their chemical composition.
The alloy designation system consists of four numerical digits, sometimes with alphabetic prefixes or suffixes. The first digit indicates the major alloying element or group of elements; the second digit indicates variations in the original alloy or impurity limits; the third and fourth digits identify specific alloys within a series.
For example, 6061 is an aluminum alloy that belongs to the 6000 series (magnesium and silicon as major alloying elements), has no variations from the original alloy (second digit is 0), and is assigned number 61 within the series (third and fourth digits).
The chemical composition limits are expressed as weight percentages of each element in an alloy. They specify the minimum or maximum amounts of each element that can be present in an alloy without affecting its properties or performance.
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For example, according to ANSI H35.2 standard, 6061 alloy must have 0.8-1.2% magnesium, 0.4-0.8% silicon, 0.15-0.4% copper, 0.15% chromium, 0.7% iron, 0.15% zinc, 0.25% manganese, 0.15% titanium, 0.05% bismuth (maximum), 0.05% lead (maximum), and 0.15% other elements (maximum) in its composition.
Dimensional Tolerances for Aluminum Mill Products
Another key feature of ANSI H35.2 standard is that it specifies the dimensional tolerances for aluminum mill products, such as thickness, width, length, diameter, straightness, flatness, squareness, etc.
The dimensional tolerances are the allowable variations from the specified dimensions of a product. They are defined and measured in different ways depending on the type and shape of the product, such as sheet, plate, foil, wire, rod, bar, tube, pipe, forgings, forging stock, and electrical conductors.
The standard provides tables and footnotes that show the dimensional tolerances for each product and temper (condition of hardness or strength). The tables are organized by product type and shape, and the footnotes provide additional information or exceptions to the general rules.
The standard also explains how to apply the dimensional tolerances to different products and tempers, such as how to measure the thickness of a sheet or plate, how to determine the flatness of a foil or strip, how to calculate the straightness of a wire or rod, etc.
Benefits of Using ANSI H35.2 Standard
Quality Assurance and Consistency
One of the main benefits of using ANSI H35.2 standard is that it ensures the quality and consistency of aluminum mill products and their applications. By following the standard, you can be confident that your products meet the requirements and expectations of your customers and end-users.
The standard also helps you avoid errors and disputes in the production and trade of aluminum mill products. By using the same alloy designations and chemical composition limits, you can avoid confusion and miscommunication with your suppliers and customers. By using the same dimensional tolerances, you can avoid rejections and claims due to non-conformity or defects.
Performance Optimization and Innovation
Another benefit of using ANSI H35.2 standard is that it provides guidance and flexibility for product design and development. By understanding the properties and characteristics of different aluminum alloys and tempers, you can optimize the performance and functionality of your products for various applications and environments.
The standard also supports new technologies and innovations for aluminum mill products and their applications. By providing a framework and a reference for new alloys and products, you can explore new possibilities and opportunities for improving your products and expanding your markets.
Conclusion
In conclusion, ANSI H35.2 standard is a valuable resource for anyone involved in the production, fabrication, or use of aluminum mill products. It covers the alloy designations and chemical composition limits for wrought aluminum and wrought aluminum alloys, as well as the dimensional tolerances for aluminum mill products.
The standard offers many benefits for ensuring the quality, consistency, performance, and innovation of aluminum mill products and their applications. It also helps you avoid errors and disputes in the production and trade of aluminum mill products.
If you want to access ANSI H35.2 standard online, you can download it from [ANSI Webstore] for a nominal fee. You can also find more information about ANSI H35.2 standard from [The Aluminum Association], which is the organization that developed and maintains the standard.
FAQs
Q1: Who developed and maintains ANSI H35.2 standard?
A1: ANSI H35.2 standard was developed by The Aluminum Association, which is an industry association that represents U.S. aluminum producers and suppliers. The Aluminum Association also maintains and updates the standard periodically to reflect changes in technology and market needs.
Q2: How often is ANSI H35.2 standard revised or updated?
A2: ANSI H35.2 standard is revised or updated every five years or as needed. The latest edition of the standard was published in 2017.
Q3: What are some examples of aluminum mill products covered by ANSI H35.2 standard?
A3: Some examples of aluminum mill products covered by ANSI H35.2 standard are sheet, plate, foil, wire, rod, bar, tube, pipe, forgings, forging stock, and electrical conductors. These products have various shapes, sizes, and tempers, and are used for different purposes and applications.
Q4: What are some other standards related to ANSI H35.2 standard?
A4: Some other standards related to ANSI H35.2 standard are ANSI H35.1, which defines the nomenclature and temper designations for aluminum and aluminum alloys; ANSI H35.4, which specifies the mechanical properties of wrought aluminum and wrought aluminum alloys; and ANSI H35.5, which specifies the methods of testing for mechanical properties of aluminum and aluminum alloys.
Q5: Where can I find more information about ANSI H35.2 standard?
A5: You can find more information about ANSI H35.2 standard from the following sources:
[ANSI Webstore], where you can download the standard for a nominal fee.
[The Aluminum Association], where you can learn more about the organization and its activities related to the standard.
[Aluminum Standards and Data], where you can access a comprehensive reference book that contains the standard and other related information.
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