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EN41  905M39  Technical Data EN41 is a chromium-aluminium-molybdenum nitriding steel usually supplied in the hardened and tempered condition. TYPICAL ANALYSIS     C. Si. Mn Cr. Mo. Al. 0.40% 0.25% 0.50% 1.60% 0.20% 1.20%       Mechanical Properties Heat Treatment Tensile Strength Rm N/mm² Yield Stress Re N/mm² a% on 5.665ÖSo Impact Izod ft.lb Impact KCV J Hardness HB Size mm R 700/850 525 17 40 50 201/255 ≤150 S 775/925 585 15 40 50 223/277 ≤100 T 850/1000 680 13 35 42 248/302 ≤63