ATI 425® Alloy
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ATI 425® Alloy Technical Data Sheet ATI 425® Alloy, (Grade 38) Titanium Alloy (UNS R54250) ATI 425 alloy is a high strength, high ductility, titanium alloy available in a variety of product forms, including cold-rolled coil or sheet. Originally developed by ATI for ballistic armor applications, it has recently been characterized for aerospace and industrial applications, including publication of design allowables in the MMPDS handbook. ® ATI 425 alloy is an alpha-beta titanium alloy that uses iron and vanadium as beta stabilizers as well as aluminum as an alpha ® stabilizer. The lower aluminum and vanadium contents and higher oxygen and iron contents give ATI 425 alloy a unique combination of ductility and tensile strength. ® The combination of strength and ductility found in ATI 425 alloy makes it useful for titanium applications that require cold forming, such as roll-forming and bending, while still providing superior strength compared to low alloy grades of titanium. ® ATI 425 alloy in the cold-rolled titanium coil or sheet product forms provide advantages that come from continuous processing that ® are not available in pack-rolled sheet. For example, ATI 425 alloy cold-rolled product has better gauge tolerance and surface finish than pack-rolled sheet and is available in lengths ranging from cut sheet to coil. Coil length products are generally not available in other titanium alloys with tensile strengths exceeding 130 ksi (896 MPa) and ductility exceeding 10% elongation. SPECIFICATIONS AND CERTIFICATES AMS 6946B – Cold-rolled sheet and coil and hot-rolled sheet and plate in the mill annealed condition. ® ATI 425 alloy is designated titanium grade 38 by ASTM and covered by ASTM specifications B265, B338, B348, B381 and B861. ® ATI 425 alloy has been Board Approved for use in the ASME Boiler and PV Code to 650°F, making ATI 425 alloy the highest ® temperature ASME code approved titanium alloy in the B&PV code. ASME Boiler Code Case 2532-2 states that ATI 425 alloy can be used for parts requiring strength up to 700°F (371°C). ® ATI 425 alloy can be welded using ERTi-38 weld wire, which is produced in accordance with AWS 5.16/A5.16M. Additional industry and customer specifications are being developed. ATI 425 alloy is available in a variety of titanium product forms, including: sheet, coil, strip, Precision Rolled Strip and foil, plate, seamless tube, shapes and rectangles, ingot, and castings. ATI 425 alloy can be both hot and cold worked. The excellent ductility permits forming at room temperature. Material produced to AMS 6946 routinely meets at least a 3T bend factor. Data are typical and should not be construed as maximum or minimum values for specification or for final design. Data on any particular piece of material may vary from those herein. ® Registered Trademark of ATI Properties, Inc. U.S. and foreign patents; other patents pending. © 2013 ATI. All rights reserved. VERSION 1 (11/25/2013): PAGE 1 of 6 Allegheny Technologies Incorporated 1000 Six PPG Place Pittsburgh, PA 15222-5479 U.S.

ATI 425® Alloy Technical Data Sheet WELDABILITY ® ATI 425 alloy is easily welded in the annealed condition using methods typically applied to titanium, such as TIG, MIG, EB, and plasma. Precautions must be taken to prevent oxygen, nitrogen, and hydrogen contamination. Fusion welding can be done in inert gas filled chambers, or using inert gas shielding of the molten metal and the adjacent heated zones. Spot, seam, and flash welding can be performed without resorting to protective atmospheres. ATI has evaluated the corrosion resistance of ATI 425 alloy in a variety of media. ATI 425 alloy...

ATI 425® Alloy Technical Data Sheet PHYSICAL PROPERTIES 3 Density: 0.161 lb/in (4.452g/cm ) Beta Transus Temperature: 1780ºF ± 25º (971ºC ± 14º) Data are typical and should not be construed as maximum or minimum values for specification or for final design. Data on any particular piece of material may vary from those herein. ® Registered Trademark of ATI Properties, Inc. U.S. and foreign patents; other patents pending. © 2013 ATI. All rights reserved. VERSION 1 (11/25/2013): PAGE 3 of 6 Allegheny Technologies Incorporated 1000 Six PPG Place Pittsburgh, PA 15222-5479 U.S.A. www.ATImeta

ATI 425® Alloy Technical Data Sheet COLD-ROLLED COIL AND SHEET TYPICAL MECHANICAL PROPERTIES – MILL ANNEAL CONDITION Data are typical and should not be construed as maximum or minimum values for specification or for final design. Data on any particular piece of material may vary from those herein. ® Registered Trademark of ATI Properties, Inc. U.S. and foreign patents; other patents pending. © 2013 ATI. All rights reserved. VERSION 1 (11/25/2013): PAGE 4 of 6 Allegheny Technologies Incorporated 1000 Six PPG Place Pittsburgh, PA 15222-5479 U.S.A. www.ATImetals.c

ATI 425® Alloy Technical Data Sheet HOT-ROLLED SHEET & PLATE TYPICAL MECHANICAL PROPERTIES – MILL ANNEAL CONDITION Data are typical and should not be construed as maximum or minimum values for specification or for final design. Data on any particular piece of material may vary from those herein. ® Registered Trademark of ATI Properties, Inc. U.S. and foreign patents; other patents pending. © 2013 ATI. All rights reserved. VERSION 1 (11/25/2013): PAGE 5 of 6 Allegheny Technologies Incorporated 1000 Six PPG Place Pittsburgh, PA 15222-5479 U.S.A. www.ATImetals.c

ATI 425® Alloy Technical Data Sheet HOT WORKED BAR AND BILLET TYPICAL MECHANICAL PROPERTIES – MILL ANNEAL CONDITION HOT WORKED BAR AND BILLET TYPICAL MECHANICAL PROPERTIES – SOLUTION TREATED AND AGED CONDITION Data are typical and should not be construed as maximum or minimum values for specification or for final design. Data on any particular piece of material may vary from those herein. ® Registered Trademark of ATI Properties, Inc. U.S. and foreign patents; other patents pending. © 2013 ATI. All rights reserved. VERSION 1 (11/25/2013): PAGE 6 of 6 Allegheny Technologies Incorporated 1000...