-
SEAMLESS TUBES IN VARIOUS SIZES, ALLOYS AND HARDNESS.
Vickers Hardness Number | Brinell Hardness Number | Rockwell Hardness Number | Rockwell Superficial Hardness Number | |||
B Scale | C Scale | 15-T scale | 30-T scale | 45-T Scale | ||
Vickers Indenter 1, 5, 10, 30-kgf | 10-mm Standard Ball, 3000-kgf | 100-kgf, 1/16″ (1,588 mm) Ball | 150-kgf Diamond Pene- trator | 15-kgf, 1/16″ (1,588 mm) Ball | 30-kgf, 1/16″ (1,588 mm) Ball | 45-kgf, 1/16″ (1,588 mm) Ball |
HV | HBS | HRB | HRC | HR 15-T | HR 30-T | HR 45-T |
513 | 479 | 50,0 | ||||
481 | 450 | 48,0 | ||||
452 | 425 | 46,0 | ||||
427 | 403 | 44,0 | ||||
404 | 382 | 42,0 | ||||
382 | 363 | 40,0 | ||||
362 | 346 | 38,0 | ||||
344 | 329 | 36,0 | ||||
326 | 313 | 34,0 | ||||
309 | 298 | 106 | 32,0 | 94,5 | 85,5 | 77,0 |
285 | 275 | 104 | 28,5 | 94,0 | 84,5 | 75,0 |
266 | 258 | 102 | 25,5 | 93,0 | 83,0 | 73,0 |
248 | 241 | 100 | 22,5 | 92,5 | 81,5 | 71,0 |
234 | 228 | 98 | 20,0 | 92,0 | 80,5 | 69,0 |
220 | 215 | 96 | 17,0 | 91,0 | 79,0 | 67,0 |
209 | 204 | 94 | 14,5 | 90,5 | 77,5 | 65,0 |
198 | 194 | 92 | 12,0 | 89,5 | 76,0 | 63,0 |
188 | 184 | 90 | 9,0 | 89,0 | 75,0 | 61,0 |
179 | 176 | 88 | 6,5 | 88,0 | 73,5 | 59,5 |
171 | 168 | 86 | 4,0 | 87,5 | 72,0 | 57,5 |
164 | 161 | 84 | 2,0 | 87,0 | 70,5 | 55,5 |
157 | 155 | 82 | 86,0 | 69,5 | 53,5 | |
151 | 149 | 80 | 85,5 | 68,0 | 51,5 | |
145 | 144 | 78 | 84,5 | 66,5 | 49,5 | |
140 | 139 | 76 | 84,0 | 65,5 | 47,5 | |
135 | 134 | 74 | 83,0 | 64,0 | 45,5 | |
130 | 129 | 72 | 82,5 | 62,5 | 43,5 | |
126 | 125 | 70 | 82,0 | 61,0 | 41,5 | |
122 | 121 | 68 | 81,0 | 60,0 | 39,5 | |
119 | 118 | 66 | 80,5 | 58,5 | 37,5 | |
115 | 114 | 64 | 79,5 | 57,0 | 35,5 | |
112 | 111 | 62 | 79,0 | 56,0 | 33,5 | |
108 | 108 | 60 | 78,5 | 54,5 | 31,5 | |
106 | 106 | 58 | 77,5 | 53,0 | 29,5 | |
103 | 103 | 56 | 77,0 | 51,5 | 27,5 | |
100 | 100 | 54 | 76,0 | 50,5 | 25,5 | |
98 | 98 | 52 | 75,5 | 49,0 | 23,5 | |
95 | 95 | 50 | 74,5 | 47,5 | 21,5 |