Unified numbering system

Unified numbering system

The unified numbering system (UNS) is an alloy designation system widely accepted in North America. It consists of a prefix letter and five digits designating a material composition. A prefix of S indicates stainless steel alloys, C for copper, brass, or bronze alloys, T for tool steels, etc. The first three digits often match older three-digit numbering systems, while the last two digits indicate more modern variations. For example, Copper Alloy No. 377 (forging brass) in the original three-digit system became C37700 in the UNS System. The UNS is managed jointly by the ASTM International and SAE International. A UNS number alone does not constitute a full material specification because it establishes no requirements for material properties, heat treatment, form, or quality.

Some common materials and translations to other standards:
* UNS K11547 is T2 tool steel
* UNS S17400 is ASTM grade 630, Cr-Ni 17-4PH precipitation hardening stainless steel
* UNS S30400 is SAE 304, Cr/Ni 18/10, Euronorm 1.4301 stainless steel
* UNS S31600 is SAE 316
* UNS S31603 is 316L, a low carbon version of 316

ee also

*Steel grades
*SAE steel grades

References

External links

* [http://www.matweb.com/search/SearchUNS.asp UNS Number Lookup, MatWeb] Entering the UNS number shows a data sheet on the alloy.


Wikimedia Foundation. 2010.

Игры ⚽ Нужен реферат?

Look at other dictionaries:

  • Stamp numbering system — Philatelists traditional method of identifying postage stamps uniquely has long been to number each country s stamps consecutively; Norway #1 is the 4 skilling blue stamp issued in 1855, and so forth. However, this seemingly straightforward… …   Wikipedia

  • Numbering scheme of the German railways — The different railway companies in Germany have used various schemes to classify their rolling stock. From the beginning As widely known the first few locomotives had names. The first locomotive in public service in Germany from 1835 was named… …   Wikipedia

  • Arlington County, Virginia, street-naming system — This article details the street naming system of Arlington County, Virginia in the United States.Although the streets of Arlington County are not laid out on a grid plan, its local streets follow sequential numbered or alphabetic patterns that… …   Wikipedia

  • Highway system of São Paulo — The highway system of São Paulo is the largest statewide road transportation system in Brazil, with 34,650 km. It consists of a hugely interconnected network of municipal (11,600 km), state (22,000 km) and federal (1,050 km) roads. More than 90%… …   Wikipedia

  • National Communications System — NCS seal The National Communications System (NCS) is an office within the United States Department of Homeland Security charged with enabling national security and emergency preparedness communications (NS/EP telecommunications) using the… …   Wikipedia

  • Arkansas Highway System — Highway markers for Interstate 40, US Highway 62 and AR 7 …   Wikipedia

  • Shanghai Metro — Infobox Public transit name=Shanghai Metro imagesize=55px locale=Shanghai, China transit type=Rapid transit began operation=1995 ended operation= system length=convert|228.4|km|mi|1|abbr=on|lk=on lines=8 vehicles= stations=162 ridership=3.09… …   Wikipedia

  • Roads in the United Kingdom — The A2 at Leyton Cross, Dartford. Roads in the United Kingdom form a network of varied quality and capacity. Road distances are shown in miles or yards and UK speed limits are in miles per hour (mph) or use of the national speed limit (NSL)… …   Wikipedia

  • UNS — can mean:* Unified Special, see Unified Thread Standard * In fiction, this often indicates United Nations Ship (akin to USS ) * In Marketing Research, this term is often used to indicate Unspecified open end responses. * Unnilseptium (Uns), is… …   Wikipedia

  • UNS-Nummer — Die UNS Nummer (englische Abkürzung für Unified Numbering System for Metals and Alloys ) ist eine Systematik, in der jedes Metall mit einem Buchstaben und fünf folgenden Zahlen bestimmt wird. Es ist ein industrielles System, über das sich keine… …   Deutsch Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”