OK Tigrod 13.38

OK Tigrod 13.38 is a non‑copper‑coated, low‑alloy (9CrMoVN) TIG welding rod designed for high‑temperature steels and steels used in hot hydrogen service, such as P91/T91.

Key Features

• Low‑alloy composition with 9 % Cr for excellent high‑temperature strength
• Clean alloy with reduced impurity limits for consistent performance
• Meets multiple international classifications (EN ISO 21952, SFA/AWS A5.28)
• CE and UKCA approved

Specifications

• Classifications: EN ISO 21952‑A (W CrMo91), EN ISO 21952‑B (W 62 I1 9C1MV), SFA/AWS A5.28 (ER90S‑B91)
• Approvals: CE EN 13479, UKCA EN 13479, VdTÜV 07686
• Typical Weld Metal Composition %: C 0.1, Mn 0.5, Si 0.3, S 0.002, P 0.004, Ni 0.8, Cr 8.7, Mo 0.9, V 0.2, Cu 0.1, N 0.04, Nb 0.06
• Typical Wire Composition %: C 0.1, Mn 0.5, Si 0.3, Ni 0.5, Cr 8.7, Mo 0.9, V 0.20, N 0.05

Applications

• GTAW of high‑temperature steels in oil refineries
• Welding of 9 % Cr steels such as P91/T91
• Hot hydrogen service applications