The weldability of Ti 6-2-4-2 is fair, using AMS 4952 weld wire. Several different treatments are available.
Sheet & Strip under 0.1875″ thickness: Duplex anneal: 899°C, 30 minutes, air cool, followed by 787°C 15 minutes, air cool.
Triplex anneal: 899°C 30 minutes, air cool, followed by 787°C 15 minutes air cool, 593°C 2 hours air cool.
Plate 0.1875 inch thickness and over: Duplex anneal: 343°C 60 minutes, air cool, followed by 593°C 8 hours air cool. Triplex anneal: 899°C 30 minutes, air cool, followed by 787°C, 15 minutes air cool, 593°C 2 hours air cool.
Bar and Forgings: Duplex anneal: Solution anneal 25 – 50°C below. Beta transus 1 hour, air cool or faster, 593°C 8 hours air cool.
Ti 6-2-4-2 can be used in a variety of applications including:
SPECIFICATIONS
UNS Number: UNS R56400
Werkstoff Number: 3.7164, 3.7165
Standards: ASTM B265, 348, 381,363, MSRR8610, 8614. 8652, AMS 4911, 4920, 4928, 4934, 4935, 4965, 4967, 6930, 6931,6931B, B337,B338
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