OK Tigrod 13.38 GTAW ER90S-B9 Description OK Tigrod 13.38 is a 9CrMoVN-alloyed rod for the GTAW of high-temperature steels and steels for hot hydrogen service, especially in oil refineries. It should preferably be used for 9% Cr steels, such as P 91/T 91 steels. The alloy is modified in terms of the limits for impurity elements and is extremely "clean". This produces improved strength levels both at room temperature and at higher temperatures. AWS has changed the classification for this product. The previous classification was A5.9 ER505. Welding current DC(-) Classifications SFA/AWS A5.28 ER90S-B9 EN 12070 W CrMo91 Wire composition C Si Mn Cr Ni Mo 0.1 0.2 0.5 8.9 0.7 1.0 Typical mech. properties all weld metal Yield stress, MPa 690 Tensile strength, MPa 785 Elongation, % 20 Charpy V Test temps, °C Impact values, J +20 200 0 180 -20 150 -40 90 -60 70 Approvals UDT DIN 8575 VdTÜV 07686
