UNS Unified Numbering System

UNS (unified numbering system) designation for chemistry oniy,... 

UNS. Unified Numbering System satisfies the need for a common designation system for all alloys. The UNS number uniquely identifies the chemical composition of alloys that have been fixed by other organizations, such as one of the metal manufacturers associations. If the alloy is proprietary or produced by a limited number of suppliers, the chemical composition is established by the supplier. The... 

The wide variety of standards for steels which have developed from national standards and efforts of international standardization are compiled in [1.81]. In the present section we are using different standard designations as provided by the sources used. In the following sections, the SAE (Society of Automotive Engineers), AISI (American Iron and Steel Institute), and UNS (Unified Numbering System) designations are the dominating ones. 

The standard AISI types with the Unified Numbering System (UNS) designation are identified in Table 4. A number of proprietary types have not been Hsted. These are for specific uses, which justify their substantial cost. 

Alloys are nsnally designated by the Unified Numbering System (UNS) [7, 8], which incorporates earlier identihcation systems developed for particular alloy families such as aluminum and copper alloys. The UNS system is particnlarly useful when designating proprietary alloys snch as the nickel-based alloys. Ordinary alloy designations that are nonproprietary, snch as those of the 300-series stainless steels, are commonly used instead of the UNS nnmber. 

Society of Automotive Engineers and American Society for Testing and Materials. Current edition. Metals and Alloys in the Unified Numbering System. Warrendale, PA ASTM International. American Society for Testing and Materials. Current edition. Standard Practice for Numbering Metals and Alloys (UNS). ASTM E 527. Warrendale, PA ASTM International. 

MatWeb, http //www.matweb.com, is a searchable database of over 46,000 metals, plastics, ceramics, and composite materials. It allows search by material type, trade name, range of values, composition, UNS number (Unified Numbering System for Metals and Alloys) and even system of units (metric, common US units). An example of searchable materials includes thermoplastic and thermoset polymers such as ABS, nylon, polycarbonate, polyester, polyethylene, and polypropylene metals such as aluminum, cobalt, cop-... 

The materials on copper basis may be subdivided into the groups shown in Table 3.1-101. Standards for copper and copper materials have been issued by ASTM, DIN, DKE, CEN, CENELEC, ISO, and lEC. In the USA, the Unified Numbering System for Metals and Alloys (UNS) applied to Cu materials consists of the letter C and a 5 digit number. More extensive accounts of Cu and Cu alloys as materials are given in [1.102-104],... 

Unified numbering system [UNS] [FOOOOl] [R30001] [N02200] [R20001] [M20001]... 

At the present time there are three designation systems commonly used for cast materials. They are (1) the Unified Numbering System (UNS), (2) Alloy Casting Institute (ACI), and (3) the American Society for Testing and Materials (ASTM). 

A complete listing of all UNS members assigned to date can be found in the publication Metals and Alloys in the Unified Numbering System. 

Numbering System and the Unified Numbering System (UNS) that were developed by ASTM and SAE to apply to all commercial metals and alloys, define specific alloy compositions. Table 5.1 through Table 5.3 provide a comparison between ASI and UNS designation for stainless steels. 

The Unified Numbering System (UNS), as used for other metals, is also used for aluminum. A comparison for selected aluminum alloys between the Aluminum Association designation and the UNS designation is shown in Table 19.2. 

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