Product Overview ASME SA213 T12 High-Frequency Welded Finned Tubes are designed for heat-transfer applications in Waste Heat Recovery Boilers (WHRBs), where efficient heat recovery, elevated-temperature strength, and reliable long-term operation are required. The base tube is manufactured from ASME SA213 T12 , a chromium-molybdenum alloy steel grade intended for boiler, superheater, and heat-exchanger service. The addition of chromium and molybdenum provides the tube with