Unified Numbering System for Reactive and Refractory Metals and Alloys

Jul 1 2012

The Unified Numbering System discovered by SAE and ASTM is a composition-based system of commercial alloys and metals. These materials are provided with a letter each and this letter is followed by five numbers that together develop an identification number for each alloy and metal.

The reactive and refractory metals and alloys include boron, hafnium, molybdenum, niobium, tantalum, thorium, tungsten, vanadium, berylium, chromium, cobalt, rhenium, titanium and zirconium.

The table below provides the unified numbering system for all the reactive and refractory metals and alloys.

UNS Designations for Reactive and Refractory Metals and Alloys

UNS Designation
Reactive and refractory Metals and Alloys
R01001- R01999
Boron
R02001- R02999
Hafnium
R03001- R03999
Molybdenum
R04001 - R04999
Niobium (Columbium)
R05001 -R05999
Tantalum
R06001 -R06999
Thorium
R07001 - R07999
Tungsten
R08001 - R08999
Vanadium
R10001 - R19999
Berylium
R20001 - R29999
Chromium
R30001 - R39999
Cobalt
R40001- R49999
Rhenium
R50001 - R59999
Titanium
R60001 - R69999
Zirconium

Tell Us What You Think

Do you have a review, update or anything you would like to add to this article?

Leave your feedback
(Logout)
Your comment type
Submit

Sponsored Content

Editorial Highlights

The Current State of the Global Semiconductor Market

The Current State of the Global Semiconductor Market

The global semiconductor market has entered an exciting period. Demand for chip technology is both driving the industry as well as hindering it, with current chip shortages predicted to last for some time. Current trends will likely shape the future of the industry, which is set to continue to show

How are Graphene Batteries Made?

How are Graphene Batteries Made?

The primary distinction between graphene-based batteries and solid-state batteries lies in the composition of either electrode. Although the cathode is commonly changed, carbon allotropes can also be employed in fabricating anodes.

Newsletters you may be interested in

See all Newsletters »

Terms

While we only use edited and approved content for Azthena answers, it may on occasions provide incorrect responses. Please confirm any data provided with the related suppliers or authors. We do not provide medical advice, if you search for medical information you must always consult a medical professional before acting on any information provided.

Your questions, but not your email details will be shared with OpenAI and retained for 30 days in accordance with their privacy principles.

Please do not ask questions that use sensitive or confidential information.

Read the full Terms & Conditions.

Provide Feedback