Нержавеющий жаропрочный круг 20Х23Н18Нержавеющий круг 20Х23Н18 ГОСТ 2590-88, 5632-615, 5.5, 6, 6.5, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 50, 52, 53, 54, 55, 56, 58, 60, 62, 63, 65, 67, 68, 70, 72, 73, 75, 78, 80,