TABLE 32.—Temperature Conversion Tables.

TABLE 33.—Comparison Between Degrees Centigrade and Degrees Fahrenheit.

TABLE 34.—Weight of Round, Octagon and Square Carbon Tool Steel per Foot.

TABLE 35.—Weight of Round Carbon Tool Steel 12 In. in Diameter and Larger, per Foot.

TABLE 36.—Decimal Equivalents of a foot.

TEMPERATURE CONVERSION TABLES

By ALBERT SAUVEUR

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NOTE.—The numbers in bold face type refer to the temperature either in degrees Centigrade or Fahrenheit which it is desired to convert into the other scale. If converting from Fahrenheit degrees to Centigrade degrees the equivalent temperature will be found in the left column, while if converting from degrees Centigrade to degrees Fahrenheit, the answer will be found in the column on the right. These tables are a revision of those by Sauveur & Boylston, metallurgical engineers, Cambridge, Mass. Copyright, 1920.

Those using pyrometers will find this and the preceding conversion table of great convenience:

-459.4to0			0to100						100to1000
C.

TABLE 33.—COMPARISON BETWEEN DEGREES CENTIGRADE AND DEGREES FAHRENHEIT

Degrees		Degrees		Degrees		Degrees		Degrees		Degrees		Degrees
F.	C.	F.	C.	F.	C.	F.	C.	F.	C.	F.	C.	F.	C.
-40	-40.0	3	-16.1	46	7.7	89	31.6	132	55.5	175	79.4	275	135.0
-39	-39.4	4	-15.5	47	8.3	90	32.2	133	56.1	176	80.0	300	148.8
-38	-38.8	5	-15.0	48	8.8	91	32.7	134	56.6	177	80.5	325	162.7
-37	-38.3	6	-14.4	49	9.3	92	33.3	135	57.2	178	81.1	350	176.6
-36	-37.7	7	-13.8	50	10.0	93	33.9	136	57.7	179	81.6	375	190.5
-35	-37.2	8	-13.3	51	10.5	94	34.4	137	58.3	180	82.2	400	204.4
-34	-36.6	9	-12.7	52	11.1	95	35.0	138	58.8	181	82.7	425	218.3
-33	-36.1	10	-12.2	53	11.6	96	35.5	139	59.4	182	83.3	450	232.2
-32	-35.5	11	-11.6	54	12.2	97	36.1	140	60.0	183	83.8	475	246.1
-31	-35.0	12	-11.1	55	12.7	98	36.6	141	60.5	184	84.4	500	260.0
-30	-34.4	13	-10.5	56	13.3	99	37.2	142	61.1	185	85.0	525	273.8
-29	-33.9	14	-10.0	57	13.8	100	37.7	143	61.6	186	85.5	550	287.7
-28	-33.3	15	-9.3	58	14.4	101	38.3	144	62.2	187	86.1	575	301.6
-27	-32.7	16	-8.8	59	15.0	102	38.8	145	62.7	188	86.6	600	315.5
-26	-32.2	17	-8.3	60	15.5	103	39.4	146	63.3	189	87.2	625	329.4
-25	-31.6	18	-7.7	61	16.1	104	40.0	147	63.8	190	87.7	650	343.3
-24	-31.1	19	-7.2	62	16.6	105	40.5	148	64.4	191	88.3	675	357.2
-23	-30.5	20	-6.6	63	17.2	106	41.1	149	65.0	192	88.8	700	371.1
-22	-30.0	21	-6.1	64	17.7	107	41.6	150	65.5	193	89.4	725	385.0
-21	-29.4	22	-5.5	65	18.3	108	42.2	151	66.1	194	90.0	750	398.8
-20	-28.8	23	-5.0	66	18.8	109	42.7	152	66.6	195	90.5	775	412.7
-19	-28.3	24	-4.4	67	19.4	110	43.3	153	67.2	196	91.1	800	426.6
-18	-27.7	25	-3.8	68	20.0	111	43.8	154	67.7	197	91.6	825	440.5
-17	-27.2	26	-3.3	69	20.5	112	44.4	155	68.3	198	92.2	850	454.4
-16	-26.6	27	-2.7	70	21.1	113	45.0	156	68.8	199	92.7	875	468.3
-15	-26.1	28	-2.2	71	21.6	114	45.5	157	69.4	200	93.3	900	482.2
-14	-25.5	29	-1.6	72	22.2	115	46.1	158	70.0	201	93.8	925	496.1
-13	-25.0	30	-1.1	73	22.7	116	46.6	159	70.5	202	94.4	950	510.0
-12	-24.4	31	-0.5	74	23.3	117	47.2	160	71.1	203	95.0	975	523.8
-11	-23.8	32	-0.0	75	23.8	118	47.7	161	71.6	204	95.5	1,000	537.7
-10	-23.3	33	+0.5	76	24.4	119	48.3	162	72.2	205	96.1	1,100	593.3
-9	-22.7	34	1.1	77	25.0	120	48.8	163	72.7	206	96.6	1,200	648.8
-8	-22.2	35	1.6	78	25.5	121	49.4	164	73.3	207	97.2	1,300	704.4
-7	-21.6	36	2.2	79	26.1	122	50.0	165	73.8	208	97.7	1,400	760.0
-6	-21.1	37	2.7	80	26.6	123	50.5	166	74.4	209	98.3	1,500	815.5
-5	-20.5	38	3.3	81	27.2	124	51.1	167	75.0	210	98.8	1,600	871.1
-4	-20.0	39	3.8	82	27.7	125	51.6	168	75.5	211	99.4	1,700	926.6
-3	-19.4	40	4.4	83	28.3	126	52.2	169	76.1	212	100.0	1,800	982.2
-2	-18.8	41	5.0	84	28.8	127	52.7	170	76.6	213	100.5	1,900	1,037.7
-1	-18.3	42	5.5	85	29.4	128	53.3	171	77.2	214	101.1	2,000	1,093.3
0	-17.7	43	6.1	86	30.0	129	53.8	172	77.7	215	101.6	2,100	1,148.8
+1	-17.2	44	6.6	87	30.5	130	54.4	173	78.3	225	107.2	2,200	1,204.4
2	-16.6	45	7.2	88	31.1	131	55.0	174	78.8	250	121.1	2,300	1,260.0

Degrees Fahrenheit =	9 x degrees C.	+ 32
	5
Degrees Centigrade =	5 x (degrees F. - 32)
	9

Three other useful tables are also given on the following pages.

TABLE 34.—WEIGHT OF ROUND, OCTAGON AND SQUARE CARBON TOOL STEEL PER FOOT

Size in inches	Round	Octagon	Square	Size in inches	Round	Octagon	Square
1/16	0.010	0.011	0.013	2-1/2	16.79	17.71	21.37
1/8	0.042	0.044	0.053	2-5/8	18.51	19.52	23.56
3/16	0.094	0.099	0.120	2-3/4	20.31	21.42	25.86
1/4	0.168	0.177	0.214	2-7/8	22.20	23.41	28.27
5/16	0.262	0.277	0.334	3	24.17	25.50	30.78
3/8	0.378	0.398	0.481	3-1/8	26.23	27.66	33.40
7/16	0.514	0.542	0.655	3-1/4	28.37	29.92	36.12
1/2	0.671	0.708	0.855	3-3/8	30.59	32.27	38.95
9/16	0.850	0.896	1.082	3-1/2	32.90	34.70	41.89
5/8	1.049	1.107	1.336	3-5/8	35.29	37.23	44.94
11/16	1.270	1.339	1.616	3-3/4	37.77	39.84	48.09
3/4	1.511	1.594	1.924	3-7/8	40.33	42.54	51.35
13/16	1.773	1.870	2.258	4	42.97	45.34	54.72
7/8	2.056	2.169	2.618	4-1/4	48.51	51.17	61.77
15/16	2.361	2.490	3.006	4-1/2	54.39	57.37	69.25
1	2.686	2.833	3.420	4-3/4	60.60	63.92	77.16
1-1/8	3.399	3.585	4.328	5	67.15	70.83	85.50
1-1/4	4.197	4.427	5.344	5-1/4	74.03	78.08	94.26
1-3/8	5.078	5.356	6.646	5-1/2	81.25	85.70	103.45
1-1/2	6.044	6.374	7.695	5-3/4	88.80	93.67	113.07
1-5/8	7.093	7.481	9.031	6	96.69	101.99	123.12
1-3/4	8.226	8.674	10.474	7	131.61	138.82	167.58
1-7/8	9.443	9.960	12.023	8	171.90	181.32	218.88
2	10.744	11.332	13.680	9	217.57	229.48	277.02
2-1/8	12.129	12.793	15.443	10	268.60	283.31	342.00
2-1/4	13.598	14.343	17.314	11	325.01	342.80	413.82
2-3/8	15.151	15.981	19.291	12	386.79	407.97	492.48

High-speed steel, being more dense than carbon steel, weighs from 10 to 11 per cent more than carbon steel. This should be added to figures given in the table.

TABLE 35.—WEIGHT OF ROUND, CARBON TOOL STEEL 12 IN. IN DIAMETER AND LARGER, PER FOOT

Diameter, inches	Weight per foot	Diameter, inches	Weight per foot	Diameter, inches	Weight per foot
12	386.790	15-7/8	677.527	19-3/4	1,049.010
12-1/8	395.518	16	687.600	19-7/8	1,061.705
12-1/4	404.246	16-1/8	699.017	20	1,074.400
12-3/8	412.974	16-1/4	710.435	20-1/8	1,088.502
12-1/2	421.702	16-3/8	721.852	20-1/4	1,102.605
12-5/8	430.430	16-1/2	733.270	20-3/8	1,116.707
12-3/4	439.158	16-5/8	744.687	20-1/2	1,130.810
12-7/8	447.886	16-3/4	756.105	20-5/8	1,144.912
13	456.615	16-7/8	767.522	20-3/4	1,159.015
13-1/8	465.343	17	778.940	20-7/8	1,173.118
13-1/4	474.071	17-1/8	790.358	21	1,187.220
13-3/8	482.799	17-1/4	801.777	21-1/8	1,201.322
13-1/2	491.527	17-3/8	813.195	21-1/4	1,215.425
13-5/8	500.255	17-1/2	824.614	21-3/8	1,229.527
13-3/4	508.983	17-5/8	836.030	21-1/2	1,243.630
13-7/8	517.711	17-3/4	847.447	21-5/8	1,257.732
14	526.440	17-7/8	858.863	21-3/4	1,271.835
14-1/8	536.512	18	870.280	21-7/8	1,285.937
14-1/4	546.585	18-1/8	883.105	22	1,300.040
14-3/8	556.657	18-1/4	895.920	22-1/8	1,315.485
14-1/2	566.730	18-3/8	908.740	22-1/4	1,330.930
14-5/8	576.802	18-1/2	921.560	22-3/8	1,346.375
14-3/4	586.875	18-5/8	934.380	22-1/2	1,361.820
14-7/8	596.947	18-3/4	947.200	22-5/8	1,377.265
15	607.020	18-7/8	960.020	22-3/4	1,392.710
15-1/8	617.092	19	972.840	22-7/8	1,408.155
15-1/4	627.165	19-1/8	985.035	23	1,423.600
15-3/8	637.237	19-1/4	998.230	23-1/8	1,454.490
15-1/2	647.310	19-3/8	1,010.925	23-1/4	1,485.380
15-5/8	657.382	19-1/2	1,023.620	23-3/8	1,516.270
15-3/4	667.455	19-5/8	1,036.315	24	1,547.160

To find the weight of discs made of carbon steel, in diameters up to and including 12 in., without any allowance for finishing multiply the per foot weight of round bar steel, shown herewith by the decimal equivalent of a foot given in the following table:

TABLE 36.—DECIMAL EQUIVALENTS OF A FOOT

In.	0	1/8	1/4	3/8	1/2	5/8	3/4	7/8
0	0.000	0.010	0.021	0.031	0.042	0.052	0.063	0.073
1	0.083	0.094	0.104	0.115	0.125	0.135	0.146	0.156
2	0.167	0.177	0.188	0.198	0.208	0.219	0.229	0.240
3	0.250	0.260	0.270	0.281	0.292	0.302	0.313	0.323
4	0.333	0.344	0.354	0.364	0.375	0.385	0.396	0.406
5	0.416	0.427	0.437	0.448	0.458	0.469	0.479	0.480
6	0.500	0.510	0.520	0.531	0.542	0.552	0.563	0.573
7	0.583	0.594	0.604	0.615	0.625	0.635	0.646	0.656
8	0.666	0.677	0.687	0.698	0.708	0.719	0.729	0.740
9	0.750	0.760	0.770	0.781	0.792	0.802	0.813	0.823
10	0.833	0.844	0.854	0.865	0.875	0.885	0.896	0.906
11	0.916	0.927	0.937	0.948	0.953	0.969	0.979	0.990

EXAMPLE.—If the weight of a carbon steel disc 7 in. diameter, 1-5/8 in. thick is desired, turn to page 233, where the per foot weight of 7 in. round is given as 131.6 lb. Multiply this by the decimal equivalent of 1-5/8 in., or 0.135, as shown in the above table, and the product will be the net weight of the disc.

131.61	lb.	= the weight of 1 ft. of 7 in. round.
0.135		= the per foot decimal equivalent of 1-5/8 in:
65805
39483
13161
17.76735	lb.	= weight of disc 7 in. diam. 1-5/8 in. thick without any allowance for finishing.