Hardeness (HB) Resistance RM (N/mm2) Extension A (%) Nickel alloys 1, < 850 N/mm2 <250 <850 >25 Nickel alloys 2, > 850 - < 1150 N/mm2 >250 >850 <25 Nickel alloys 3, 1150 - 1600 N/mm2 >340 >1150 <20 Specifications