Frequently Asked Questions about Stainless Steel and Alloy

Hardness Conversion Table

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Brinell Hardness	Hardness Conversion Table			Tensile Strength
Brinell Hardness	A Scale	B Scale	C Scale	Tensile Strength
3000KG Ball	60KG	100KG	150KG	(Approx.)
400	72.0	–	43.1	202,000
388	71.4	–	41.8	195,000
375	70.6	–	40.4	188,000
363	70.0	–	39.1	182,000
352	69.3	110.0	37.9	176,000
341	68.7	109.0	36.6	170,000
331	68.1	108.5	35.5	166,000
321	67.5	108.0	34.3	160,000
311	66.9	107.5	33.1	155,000
302	66.3	107.0	32.1	150,000
293	65.7	106.0	30.9	145,000
285	65.3	105.5	29.9	141,000
277	64.6	104.5	28.8	137,000
269	64.1	104.0	27.6	133,000
262	63.6	103.0	26.6	129,000
255	63.0	102.0	25.4	126,000
248	62.5	101.0	24.2	122,000
241	61.8	100.0	22.8	118,000
235	61.4	99.0	21.7	115,000
229	60.8	98.2	20.5	111,000
223	–	97.3	18.8	109,000
217	–	96.4	17.5	105,000
212	–	95.5	16.8	102,000
207	–	94.6	15.2	100,000
201	–	93.8	13.5	98,000
197	–	92.8	12.7	95,000
192	–	91.9	11.5	93,000
187	–	90.7	10.0	90,000
183	–	90.0	9.0	89,000
179	–	89.0	8.0	88,000
174	–	87.8	6.4	86,000
170	–	86.8	5.4	84,000
167	–	86.0	4.4	83,000
163	–	85.0	3.3	82,000
156	–	82.9	–	80,000
149	–	80.8	–	73,000
143	–	78.7	–	71,000
137	–	76.4	–	67,000
131	–	74.0	–	65,000
126	–	72.0	–	63,000
121	–	69.8	–	60,000
116	–	67.6	–	58,000
111	–	65.7	–	56,000

Pipe Chart : Dimensions and Weights of Seamless and Welded Pipe

UPPER FIGURES = WALL THICKNESS IN INCHES LOWER FIGURES = WEIGHT PER FOOT IN POUNDS
PIPE SIZE	0. D. (INCHES)	DIMENSIONS AND WEIGHTS OF SEAMLESS AND WELDED PIPE															DBLE. E. H.
PIPE SIZE	0. D. (INCHES)	5S	5	10S	10	20	30	40S & STD,	40	60	805 & E. H.	80	100	120	140	160	DBLE. E. H.
1/8	0.405		0.035	0.049	0.049			0.068	0.068		0.095	0.095
1/8	0.405		0.1383	0.1863	0.1863			0.2447	0.2447		0.3145	0.3145
1/4	.540		0.049	0.065	0.065			0.088	0.088		0.119	0.119
1/4	.540		.2570	0.3297	0.3297			0.4248	0.4248		0.5351	0.5351
3/8	0.675		0.049	0.065	0.065			0.091	0.091		0.126	0.126
3/8	0.675		0.3276	0.4235	0.4235			0.5676	0.5676		0.7338	0.7338
1/2	.840	0.065	0.065	0.083	0.083			0.091	0.091		0.147	0.147				0.187	0.294
1/2	.840	0.5383	0.5383	.6710	.6710			.8510	.8510		1.088	1.088				1.304	1.714
3/4	1.050	0.065	0.065	0.083	0.083			0.113	0.113		0.154	0.154				0.218	0.308
3/4	1.050	0.6838	0.6838	0.8572	0.8572			1.131	1.131		1.474	1.474				1.937	2.441
1	1.315	0.065	0.065	0.109	0.109			0.133	0.133		0.179	0.179				.250	0.358
1	1.315	0.8678	0.8678	1.404	1.404			1.679	1.679		2.172	2.172				2.844	3.659
1-1/4	1.660	0.065	0.065	0.109	0.109			.140	.140		0.191	0.191				.250	0.382
1-1/4	1.660	1.107	1.107	1.806	1.806			2.273	2.273		2.997	2.997				3.765	5.214
1-1/2	1.900	0.065	0.065	0.109	0.109			0.145	0.145		.200	.200				0.281	.400
1-1/2	1.900	1.274	1.274	2.085	2.085			2.718	2.718		3.631	3.631				4.859	6.408
2	2.375	0.065	0.065	0.109	0.109			0.154	0.154		0.218	0.218				0.343	0.436
2	2.375	1.604	1.604	2.638	2.638			3.653	3.653		5.022	5.022				7.444	9.029
2-1/2	2.875	0.083	0.083	.120	.120			0.203	0.203		0.276	0.276				0.375	0.552
2-1/2	2.875	2.475	2.475	3.531	3.531			5.793	5.793		7.661	7.661				10.01	13.70
3	3.500	0.083	0.083	.120	.120			0.216	0.216		.300	.300				0.437	.600
3	3.500	3.029	3.029	4.332	4.332			7.576	7.576		10.25	10.25				14.32	18.58
3-1/2	4.000	0.083	0.083	.120	.120			0.226	0.226		0.318	0.318					0.636
3-1/2	4.000	3.472	3.472	4.973	4.973			9.109	9.109		12.51	12.51					22.85
4	4.500	0.083	0.083	.120	.120			0.237	0.237	0.281	0.337	0.337		0.437		0.531	0.674
4	4.500	3.915	3.915	5.613	5.613			10.79	10.79	12.66	14.98	14.98		19.01		22.51	27.54
4-1/2	5.000							0.247			0.355						.710
4-1/2	5.000							12.53			17.61						32.53
5	5.563	0.109	0.109	0.134	0.134			0.258	0.258		0.375	0.375		.500		0.625	.750
5	5.563	6.349	6.349	7.770	7.770			14.62	14.62		20.78	20.78		27.04		32.96	38.55
6	6.625	0.109	0.109	0.134	0.134			.280	.280		0.432	0.432		0.562		0.718	0.864
6	6.625	7.585	7.585	9.290	9.290			18.97	18.97		28.57	28.57		36.39		45.30	53.15
7	7.625							0.301			.500						0.875
7	7.625							23.57			38.05						63.08
8	8.625	0.109	0.109	0.148	0.148	.250	0.277	0.322	0.322	0.406	.500	.500	0.593	0.718	0.812	0.906	0.885
8	8.625	9.914	9.914	13.40	13.40	22.36	24.70	28.55	28.55	35.64	43.39	43.39	50.87	60.93	67.76	74.69	72.42
9	9.625							0.342			.500
9	9.625							33.90			48.72
10	10.75	0.134	0.134	0.165	0.165	.250	0.307	0.365	0.365	.500	.500	0.593	0.718	0.843	1.000	1.125
10	10.75	15.19	15.19	18.70	18.70	28.04	34.24	40.48	40.48	54.74	54.74	64.33	76.93	89.20	104.1	115.7
11	11.750							0.375			.500
11	11.750							45.55			60.07
12	12.750	0.156	0.165	.180	.180	.250	.330	0.375	0.406	0.562	.500	0.687	0.843	1.000	1.125	1.312
12	12.750	21.07	22.18	24.20	24.20	33.38	43.77	49.56	53.53	73.16	65.42	88.51	107.2	125.5	139.7	160.3
14	14.000	0.156		0.188	.250	0.312	0.375	0.375	0.437	0.593	.500	.750	0.937	1.093	1.250	1.406
14	14.000	23.07		27.73	36.71	45.68	54.57	54.57	63.37	84.91	72.09	106.1	130.7	150.7	170.2	189.1
16	16.000	0.165		0.188	.250	0.312	0.375	0.375	.500	0.656	.500	0.843	1.031	1.218	1.437	1.593
16	16.000	27.90		31.75	42.05	52.36	62.58	62.58	82.77	107.5	82.77	136.5	164.8	192.3	223.5	245.1
18	18.000	0.165		0.188	.250	0.312	0.437	0.375	0.562	.750	.500	0.937	1.156	1.375	1.562	1.781
18	18.000	31.43		35.76	47.39	59.03	82.06	70.59	104.8	138.2	93.45	170.8	208.0	244.1	274.2	308.5
20	20.000	0.188		0.218	.250	0.375	.500	0.375	0.593	0.812	.500	1.031	1.280	1.500	1.750	1.968
20	20.000	39.78		46.05	52.73	78.60	104.1	78.60	122.9	166.4	104.1	208.9	256.1	296.4	341.1	379.0
22	22.000	0.188		0.218	.250	0.375	.500	0.375		0.875	.500	1.125	1.375	1.625	1.875	2.125
22	22.000	43.8		50.71	58.07	86.61	114.81	86.61		197.41	114.81	250.81	302.88	353.61	403.0	451.06
24	24.000	0.218		.250	.250	0.375	0.562	0.375	0.687	0.968	.500	1.218	1.531	1.812	2.062	2.344
24	24.000	55.37		63.41	63.41	94.62	140.8	94.62	171.2	238.1	125.5	296.4	367.4	429.4	483.1	542.13
26	26.000				0.312	.500		0.375			.500
26	26.000				85.60	136.17		102.63			136.17
28	28.000				0.312	.500	0.625	0.375
28	28.000				92.26	146.85	182.73	110.64
30	30.000	.250		0.312	0.312	.500	0.625	0.375			.500
30	30.000	79.43		98.93	98.93	157.53	196.08	118.65			157.53
32	32.000				0.312	.500	0.625	0.375	0.688		.500
32	32.000				105.59	168.21	209.43	126.66	230.08		168.21
34	34.000				0.312	.500	0.625	0.375	0.688
34	34.000				112.25	178.89	222.78	134.67	244.77
36	36.000				0.312		0.625	0.375	.750		.500
36	36.000				118.92		236.13	142.68	282.35		189.57

Frequently Asked Questions

Pipe Chart : Dimensions and Weights of Seamless and Welded Pipe

Wire Gauge Chart :