ATI™ 425 Titanium Alloy (Ti-4Al-2.5V-1.5Fe-0.25O2)
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APPLICATIONS
ATI™ 425 titanium is an innovative new titanium product that is an alternative to the most common high-strength titanium alloy. ATI 425 titanium offers strength comparable to Ti-6Al-4V; yet, unlike Ti-6Al-4V titanium, ATI 425 titanium is both hot and cold workable. ATI 425 titanium is produced by ATI Allegheny Ludlum, ATI Allvac and ATI Wah Chang in a variety of forms, including sheet, coil, strip. Precision Rolled Strip™ product, plate, seamless tube and pipe as well as cast and engineering products.
Markets for the proprietary ATI 425 titanium include aerospace, defense, industrial, medical and recreation in applications where high-strength, lightweight materials are required. In addition, the alloy's corrosion resistance to saltwater environments (similar to that of Ti-6Al-4V) makes it a candidate material in marine-related applications.
One of the key strengths of ATI 425 titanium is that it is comparatively easy to produce and form due to its workability during the production and forming processes. Tests have shown that ATI 425 titanium can be fabricated more easily than Ti-6Al-4V. Duplex annealed ATI 425 titanium plate exhibited good fracture toughness; cold rolled and annealed ATI 425 titanium sheet has been bent to radii of 2.5 times its thickness. ATI 425 titanium is also heat treatable and can be solution-treated and aged to higher strength levels. The alloy is readily weldable with TIG and EB technology; annealed welds in light plate are capable of 4T bends.
MECHANICAL PROPERTIES
| Ballistic Armor Plate: |
0.5” – 1.8” meets/exceeds requirements MIL-DTL-46077F .30 cal. APM2, .50 cal APM2, 20mm FSP, 14.5mm B32 |
PHYSICAL PROPERTIES Ti-4Al-2.5V-1.5Fe-0.25O2 Physical Properties
Density |
Melting Range |
Beta Transus |
0.162 lb/in3 |
2912-3002º F. |
T~ 1765 - 1790ºF. |
Thermal Diffusivity
Young's Modulus
High Cycle Fatigue Testing
CORROSION DATA
ATI Wah Chang has evaluated coupons of ATI 425 titanium in a variety of media. Detailed information is available upon request. ATI 425 titanium performs similarly to Ti-6Al-4V and Ti-3Al-2.5V in marine environments and many media of the chemical process industry.
FORMABILITY
Mill annealed, cold-rolled sheet can be bent to radii down to 2.5T in thickness of 0.100” and under. Light plate, nominal 0.250” and 0.375” thickness can be bent to radii of 3.5T. In all cases, surface must be free of defects that would act as stress risers and also free of all alpha case.
WELDABILITY
A limited amount of work has been performed with TIG and EB welding. Autogenous welds which have been annealed can be bent to radii of 5 – 6T in sheet and light plate gauges. Additional welding parameters are in development. Otherwise, performance is anticipated to be similar to Ti-6Al-4V and Ti-3Al-2.5V.
FOR SALES AND TECHNICAL SERVICE FOR THIS PRODUCT, PLEASE CONTACT:
Mr. Larry Martin
Business Development Manager,
ATI-Wah Chang
PO Box 460
Albany, Oregon 97321 Phone:541-924-6896 • FAX 541-967-6994 • Larry.martin@wahchang.com |
