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OK Tigrod 13.38 is a non-copper coated, low alloyed, 9CrMoVN 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.