The vessel was 37.4 m (123 ft) long, 45 mm (1.8 in.) thick, and 3.9 m (13 ft) in outside diameter and was made of carbon-manganese steel conforming to Japanese specification JISSM50B. It was welded with E-7018 AWSclassified welding electrodes. The compositions of the parent metal and weld metal are listed in Table 8.