TABLE FOR BRINELL BALL TEST ------------------------------------------------------------------------ Diameter of Ball | Hardness Number | Diameter of Ball | Hardness Number Impression, mm. | for a Load of | Impression, mm. | for a Load of | 3,000 kg. | | 3,000 kg. -----------------|-----------------|------------------|----------------- 2.0 | 946 | 4.5 | 179 2.1 | 857 | 4.6 | 170 2.2 | 782 | 4 7 | 163 2.3 | 713 | 4.8 | 156 2.4 | 652 | 4.9 | 149 2.5 | 600 | 5.0 | 143 | | | 2.6 | 555 | 5.1 | 137 2.7 | 512 | 5.2 | 131 2.8 | 477 | 5.3 | 126 2.9 | 444 | 5.4 | 121 3.0 | 418 | 5.5 | 116 | | | 3.1 | 387 | 5.6 | 112 3.2 | 364 | 5.7 | 107 3.3 | 340 | 5.8 | 103 3.4 | 321 | 5.9 | 99 3.5 | 302 | 6.0 | 95 | | | 3.6 | 286 | 6.1 | 92 3.7 | 269 | 6.2 | 89 3.8 | 255 | 6.3 | 86 3.9 | 241 | 6.4 | 83 4.0 | 228 | 6.5 | 80 | | | 4.1 | 217 | 6.6 | 77 4.2 | 207 | 6.7 | 74 4.3 | 196 | 6.8 | 71.5 4.4 | 187 | 6.9 | 69 ------------------------------------------------------------------------ CHAPTER III ALLOYS AND THEIR EFFECT UPON STEEL In view of the fact that alloy steels are coming into a great deal of prominence, it would be well for the users of these steels to fully appreciate the effects of the alloys upon the various grades of steel. We have endeavored to summarize the effect of these alloys so that the users can appreciate their effect, without having to study a metallurgical treatise and then, perhaps, not get the crux of the matter. NICKEL