Abstract
The mechanical properties of the specified tensile test bars and of the stepped and L-secctioned castings in aluminum bronzes (JIS. AlBC 1, 2 and 3) were determined. Preferable gating systems to produce the stepped and L-sectioned castings without defects were examined with radiographic technique. The castings made under those of careful conditions have a little scatter of the mechanical properties interioly and have a slight fall in the properties even in the heavy section.
