CONVERSION CHARTS


USEFUL FORMULAS


CIRCLE-AREA
SQUARE OF DIAMETER X .7854
 SPHERE - AREA
SQUARE OF DIAMETER X 3.1416
(OR) DIAMETER X CIRCUMFERENCE
CIRCLE - CIRCUMFERNCE
DIAMETER X 3.1414
 		SPHERE - VOLUME
CUBE OF DIAMETER X .5236
CONE - CUBIC CONTENTS
AREA OF BASE X (.333 X ALITITUDE)
 		SQUARE - CIRCUMFERENCE OF CIRCUMSCRIBING CIRCLE
SIDE X 4.443
CYLINDER - AREA
LENGTH X CIRCUMFERENCE OF THE
BODY + AREA OF BOTH ENDS
 		SQUARE - DIAMETER OF CIRCUMSCRIBING CIRCLE
SIDE OF SQUARE X 1.4142
CYLINDER - VOLUME
AREA OF BASE X
PERPENDICULAR HEIGHT
 		SQUARE - SIDE OF INSCRIBED SQUARE
DIAMETER X .7071...(OR)
CIRCUMFERENCE X. .2251
ELLIPSE - AREA
PRODUCT OF AXES BY .7854
 		SQUARE - SIDE OF EQUAL SQUARE
DIAMETER X .8862
HEXAGON - AREA
AREA ON THE INSCRIBE CIRCLE X 1.1027
 		TANK - CAPACITY IN GALLONS (IN INCHES)
CYLINDRICAL... LENGTH X (SQUARE OF DIAMETER) X.0034
RECTANGULAR... LENGTH X WIDTH X DEPTH = (THIS TOTAL)
DIVIDED BY 231.0
ELLIPTICAL... LENGTH X SHORT DIAMETER X LONG DIAMETER X .0034 
OCTAGON - AREA
DISTANCE ACROSS, SQUARED X .82843
PARALLEDOGRAM - AREA
BASE X PERPENDICULAR HEIGHT
RECTANGLE - AREA
LENGTH X WIDTH 		TRIANGLE - AREA
HALF HEIGHT X BASE






























 





HARDNESS CONVERSION FOR CARBON & ALLOY STEELS

*All values are approximate

Brinell
Hardness
Number
(Carbide ball)		 Rockwell Hardness Numbers Tensile
Strength
C
Scale		 A
Scale		 15N
Scale
Superficial		 B
Scale		 30T
Scale
Superficial		 1000
Lb/Sq In		 kgf/mm
- 66 84.5 92.5 - - - -
722 64 83.4 91.8 - - - -
688 62 82.3 91.1 - - - -
654 60 81.2 90.2 - - - -
615 58 80.1 89.3 - - - -
577 56 79.0 88.3 - - 313 220
543 54 78.0 87.4 - - 292 205
512 52 76.8 86.4 - - 273 192
481 50 75.9 85.5 - - 255 179
455 48 74.7 84.5 - - 237 167
443 47 74.1 83.9 - - 229 161
432 46 73.6 83.5 - - 222 156
421 45 73.1 83.0 - - 215 151
409 44 72.5 82.5 - - 208 146
400 43 72.0 82.0 - - 201 141
390 42 71.5 81.5 - - 194 136
381 41 70.9 80.9 - - 188 132
371 40 70.4 80.4 - - 181 127
362 39 69.9 79.9 - - 176 124
353 38 69.4 79.4 - - 171 120
344 37 68.9 78.8 - - 167 117
336 36 68.4 78.3 - - 162 114
327 35 67.9 77.7 - - 157 110
319 34 67.4 77.2 - - 153 108
311 33 66.8 76.6 - - 149 105
301 32 66.3 76.1 - - 145 102
294 31 65.8 75.6 - - 142 100
286 30 65.3 75.0 - - 138 97
279 29 64.7 74.5 - - 135 95
271 28 64.3 73.9 - - 132 93
264 27 63.8 73.3 - - 128 90
258 26 63.3 72.8 - - 125 88
253 25 62.8 72.2 - - 122 86
247 24 62.4 71.6 - - 120 84
243 23 62.0 71.0 - - 117 82
240 - - - 100 82.0 116 82
234 - - - 99 81.5 112 79
222 - - - 97 80.5 106 75
210 - - - 95 79.0 101 71
200 - - - 93 78.0 96 67
195 - - - 92 77.5 93 65
185 - - - 90 76.0 89 63
176 - - - 88 75.0 85 60
169 - - - 86 74.0 81 57
162 - - - 84 73.0 78 55
156 - - - 82 71.5 75 53
150 - - - 80 70.0 72 51
144 - - - 78 69.0 - -
139 - - - 76 67.5 - -
135 - - - 74 66.0 - -
130 - - - 72 65.0 - -
125 - - - 70 63.5 - -
121 - - - 68 62.0 - -
117 - - - 66 60.5 - -
114 - - - 64 59.5 - -





STAINLESS STEEL MACHINABILITY RATINGS


GRADE APPROXIMATE
SURF. FT.
PER MIN.		 % RELATIVE SPEED
BASED ON
C-1212 as 100%		 GRADE APPROXIMATE
SURF.FT.
PER MIN.		 % RELATIVE SPEED
BASED ON
C-1212 as 100% (165 SFM)
302 70 40 420 85 50
302/304 "B" 55 28 420F 125 68
303 150 75 422 85 50
303 High Tensile 80 43 430 110 66
304 70 40 430F 150 75
304L 70 40 431 80 48
309 60 36 440 A 65 40
310 60 36 440 C 65 40
316 60 36 440 F Se 80 48
316"B" 50 22 446 60 36
316 L 60 36 Custom 455(12-9-2) 55 28
317-317 L 60 36 PH-13-8 MO 60 36
317 LM 60 36 15-5 PH 75 45
321 60 36 15-7 75 45
330 45 20 17-4 PH 75 45
347 60 36 17-4 PH "H1150" 85 50
403 95 54 17-7 PH 75 45
410 95 54 AM 355 72 42
416 Ann 150 75 Nitronic 40 50 22
416 H.T. 85 50 Nitronic 50 50 22
418 (Greek Ascoloy) 96 50 Nitronic 60 50 22
Alloy 20 70 40 -





RACTIONAL, DECIMAL & METRIC EQUIVALENTS


Fractional
Inch		 Dec.
Equiv 		Millimeters Fractional
Inch		 Dec.
Equiv 		Millimeters
1/64 .0156 .397 17/32 .5313 13.494
1/32 .0313 .794 35/64 .5469 13.891
3/64 .0469 1.191 9/16 .5625 14.288
1/16 .0625 1.588 37/64 .5781 14.684
5/64 .0781 1.984 7/12 .5833 14.817
1/12 .0833 2.117 19/32 .5938 15.081
3/32 .0938 2.381 3/5 .6000 15.240
1/10 .1000 2.540 39/64 .6094 15.478
7/64 .1094 2.778 5/8 .6250 15.875
1/8 .1250 3.175 41/64 .6406 16.272
9/64 .1406 3.572 21/32 .6563 16,669
1/6 .1667 4.233 2/3 .6667 16.933
11/64 .1719 4.366 43/64 .6719 17.066
3/16 .1875 4.700 11/16 .6875 17.463
1/5 .2000 5.080 7/10 .7000 17.780
13/64 .2031 5.159 45/64 .7031 17.859
7/32 .2188 5.556 23/32 .7188 18.256
15/64 .2344 5.953 47/64 .7344 18.653
1/4 .2500 6.350 3/4 .7500 19.050
17/64 .2656 6.747 49/64 .7656 19.447
9/32 .2813 7.144 25/32 .7813 19.844
19/64 .2969 7.541 51/64 .7969 20.241
3/10 .3000 7.620 4/5 .8000 20.320
5/16 .3125 7.937 13/16 .8125 20.638
1/3 .3333 .3333 53/64 .8281 21.034
11/32 .3438 8.731 5/6 .8333 21.167
23/64 .3594 9.128 27/32 .8438 21.431
23/64 .3594 9.128 27/32 .8438 21.431
3/8 .3750 9.525 55/64 .8594 21.828
25/64 .3906 9.922 7/8 .8750 22.225
2/5 .4000 10.160 57/64 .8906 22.622
13/32 .4063 10.319 9/10 .9000 22.860
5/12 .4167 10.583 29/32 .9063 23.019
27/64 .4219 10.716 11/12 .9167 23.283
7/16 .4375 11.112 59/64 .9219 23.416
29/64 .4531 11.509 15/16 .9375 23.813
15/32 .4688 11.906 61/64 .9531 24.209
31/64 .4844 12.303 31/32 .9688 24.606
1/2 .5000 12.700 63/64 .9844 25.003
33/64 .5156 13.097 1" 1.000 25.400