TAA steel casting for shipbuilding Stern post/tube, Rudder horn, Rudder upper/lower ISO9001: ... Zibo city in China. We could manufacture large scale steel and iron casting with single piece weight 1MT – ... Weight of single casting: 1MT – 75 MT3. Material: various steel and iron4. Standards: ASTM, DIN, JIS, BS, GB5. Certificates ... horn, Rudder upper/lower casting, Bell mouth, Stern post, Stern tube, etc.