Effect of rare earth yttrium on hot ductility of 20CrMnTi steel with 0.05% Tin Hong-Bing Peng, Wei-Qing Chen, Lie Chen and Dong Guo Metall. Res. Technol., 112 3 (2015) 307 Published online: 09 June 2015 DOI: 10.1051/metal/2015017