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Engineering Class Chains Properties of Steel Relation of Hardness to Strength of Steel Rockwell "C" 150 Kg Load 120 deg Rockwell "B" 100 Kg Load 1/16 inch Diamond Cone 68 63 62 60 59 57 56 55 54 53 52 50 49 47 46 45 43 42 40 39 38 37 36 34 33 32 31 30 29 28 27 25 Diamond Ball 120 119 119 117 117 116 115 115 114 113 112 112 110 110 109 109 108 108 107 106 106 105 104 103 102 Brinell Hardness Number 120 deg Standard Ball *745 *710 *682 *653 *627 *601 *578 *555 *534 *514 495 477 461 444 429 415 401 388 375 363 352 341 331 321 311 302 293 285 277 269 262 255 Approximate Tensile Strength of Steel (lbs) 368,000 350,000 340,000 330,000 323,000 309,000 297,000 285,000 274,000 263,000 259,000 247,000 237,000 226,000 217,000 210,000 202,000 195,000 188,000 182,000 176,000 170,000 166,000 160,000 155,000 150,000 145,000 141,000 137,000 133,000 129,000 126,000 Rockwell "C" 150 Kg Load 120 deg Rockwell "B" 100 Kg Load 1/16 inch Brinell Hardness Number Diamond Cone 24 23 22 21 19 18 16 15 14 13 12 10 9 8 6 5 4 3 1 - Diamond Ball 101 100 99 98 97 96 96 95 94 93 92 91 90 89 88 87 86 85 83 81 79 76 74 72 70 68 66 64 61 59 56 Standard Ball 248 241 235 229 223 217 212 207 201 197 192 187 183 179 174 170 167 163 156 149 143 137 131 126 121 116 111 107 103 99 95 Approximate Tensile Strength of Steel (lbs) 122,000 118,000 115,000 111,000 108,000 105,000 102,000 100,000 98,000 95,000 93,000 90,000 89,000 87,000 85,000 83,000 81,000 79,000 76,000 73,000 71,000 67,000 65,000 63,000 60,000 58,000 56,000 55,000 53,000 51,000 49,000 *Tungsten Carbide Ball Strength of Materials Material Gray Cast Iron (average grade) Gray Cast Iron (good grade) Gray Cast Iron (high strength grade) Malleable Iron Wrought Iron Cast Medium Carbon Steel Hot Rolled Carbon Steel Cold Rolled Carbon Steel Rivet Steel Structural Steel 116 Tensile Strength (lbs) Compressive Strength (lbs) Shear Strength (lbs) 22,000 30,000 40,000 53,000 48,000 70,000 60,000 75,000 57,000 60,000 100,000 125,000 175,000 46,000 70,000 60,000 75,000 57,000 60,000 24,000 35,000 45,000 48,000 40,000 60,000 45,000 55,000 44,000 45,000 Yield Strength (psi) Modulus of Elasticity 35,000 25,000 40,000 30,000 40,000 36,000 30,000 16,000,000 20,000,000 22,000,000 25,000,000 27,000,000 30,000,000 30,000,000 30,000,000 30,000,000 30,000,000