Search a UNS number, common grade designation, or alloy name and quickly find the associated material family and reference information.
Search for a UNS number or grade to display matching materials.
| Prefix | Material Family | Examples |
|---|---|---|
| A | Aluminum and aluminum alloys | A96061, A97075 |
| C | Copper and copper alloys | C11000, C26000, C36000 |
| F | Cast irons | F10001, F12801 |
| G | Carbon and alloy steels | G10100, G41400 |
| K | Miscellaneous ferrous alloys | Kxxxx |
| N | Nickel and nickel alloys | N02200, N06625 |
| R | Refractory and reactive metals | R50400, R56400 |
| S | Stainless and heat-resistant steels | S30400, S31600, S41000 |
| T | Titanium and titanium alloys | T02000, T06040 |
What does UNS stand for? UNS stands for Unified Numbering System for Metals and Alloys. It provides systematic designations for many metallic materials.
How is a UNS number structured? A UNS designation normally consists of a letter followed by five digits, such as S30400 or N06625. The letter identifies the general material family.
What is UNS S30400? S30400 is the UNS designation commonly associated with Type 304 austenitic stainless steel.
What is UNS S31600? S31600 is commonly associated with Type 316 austenitic stainless steel.
What is UNS N06625? N06625 is commonly associated with nickel-chromium-molybdenum alloy 625.
What is UNS C11000? C11000 is a commercially pure copper designation commonly used for electrolytic tough-pitch copper.
Is UNS the same as a material specification? No. UNS is a numbering system. ASTM, ASME, AMS and other specifications can impose additional requirements for a specific product form and application.
Can I identify a material from its UNS number alone? A UNS number can identify the registered alloy designation, but it does not by itself establish the complete product specification, condition, dimensions, heat treatment or certification requirements.
Does this tool replace a material certificate? No. For engineering, procurement or safety-critical work, use the manufacturer's material certificate and the applicable material standard.