Welding beam fabricated

However, the fabricator is a cautious man and, although he is confident that he will need no preheat, he designs his joint simulation test so that he can include test welds made with some preheat. He therefore makes the fabricated beam 2 m long, so that he can include three stiffeners staggered on either side of the beam as shown in Fig. 2.9. He also selects the plates which have the maximum CE of... 

Welding. IMI 685 can be joined by the processes normally used in the fabrication of titanium, including argon-arc, electron-beam, and fnction welding. Material should be fully heat treated prior to welding, and also given a suitable postweld treatment (for example 4-8 h at 550 °C). The weld zone of material treated in this way will have similar structm-e, and hence similar properties, to those of the parent metal. 

Product Forms and Fabrication. Transage 129 can be produced in all mill product forms. It has good formability and can be drawn at room temperature into deep cups with reasonable die radii. riVansage 129 is especially recommended for cold formable sheet apphcations and it can be welded by all methods. Weld efficiency of 100% has been demonstrated to strength levels to 1446 MPa (210 ksi) for two-pass electron beam transverse weldments on 1.4 mm (0.056 in.) sheet. The alloy has excellent net-shape capability by isothermed forging, which can be done at temperatures as low as 650 °C (1200 °F), although beta forging at 760 to 815 °C (1400 to 1500 °F) is considered optimum. 

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