SPECIAL ALLOY STEELS (sheets, slabs, rounds, squares, flats) W. Nr 1.3401 | X120Mn12 Manganese steel with good wear resistant, it has good resistance to shock loads. It’s suitable for construction of strongboxes, sandblasters, for the armour of doors, etc. Sheets X120Mn12 - W. Nr. 1.3401 SPECIAL ALLOY STEELS C Mn Si Cr P 1.10 - 1.30 12.00 - 13.00 0.30 - 0.50 ≤ 1.50 ≤ 0.010 S ≤ 0.040 * indicative values X120Mn12 - W. Nr. 1.3401 HB R N/mm² Rs N/mm² A% 200 865/980 305/345 30min