ASTM A106 Grade B Carbon Steel Seamless Pipes

Published:2025-05-10 | Last Updated: 2025-06-14 Views: 19

I. ASTM A106 Grade B Seamless Carbon Steel Pipe Standard and Definition

A106 Grade B Seamless Carbon Steel Pipe is a seamless carbon steel pipe produced according to the ASTM A106 standard set by the American Society for Testing and Materials (ASTM).

The standard divides seamless carbon steel pipe into three grades: A, B and C, of which grade B is the most widely used grade.

II. Chemical composition

The chemical composition of A106 Grade B seamless carbon steel pipe is as follows:

Element	Maximum	Minimum
Carbon (C)	0.30%	-
Manganese (Mn)	1.06%	0.29%
Phosphorus (P)	0.035%	-
Sulfur (S)	0.035%	-
Silicon (Si)	-	0.10%
Chromium (Cr)	0.40%	-
Copper (Cu)	0.40%	-
Molybdenum (Mo)	0.15%	-
Nickel (Ni)	0.40%	-
Vanadium (V)	0.08%	-

III. Mechanical properties

The mechanical properties of ASTM A106 Grade B Carbon Steel Seamless Pipes are as follows:

Mechanical Properties of A106 Grade B Carbon Steel

Property	Value
Tensile Strength (T.S)	≥415 MPa
Yield Strength (Y.S)	≥240 MPa
Elongation (EL)	≥22%

IV. Manufacturing process

ASTM A106 Seamless Carbon Steel Pipes can be manufactured by cold drawing or hot working process:

Cold-drawn: high dimensional accuracy and smooth surface, suitable for applications requiring high dimensional accuracy and strength.

Hot working: the surface may have oxidized skin or other traces of hot working, suitable for applications requiring low dimensional accuracy but high plasticity of the material.

V. Dimensional range

The dimensional range of A106 Grade B carbon steel seamless pipe is:

OD: NPS 1/8 - NPS 48 (DN 6 - DN 1200)

Wall thickness: in accordance with ASME B36.10.

VI. Areas of application

A106 B grade carbon Seamless Steel Pipes are widely used in the following fields:

Oil and gas industry: used for extraction, transportation and storage of oil and gas.

Chemical industry: used for transportation of various chemical raw materials, intermediate products and finished products.

Electric power industry: used for steam piping and water supply piping in thermal power stations.

Construction industry: used in building water supply and drainage systems, heating piping systems, etc.

VII.Theoretical weight table of carbon steel seamless pipe

Outer diameter（mm）	Wall thickness（mm）	Theoretical weight （kg/m）	Outer diameter（mm）	Wall thickness（mm）	Theoretical weight （kg/m）
10	1.5	0.246	152	5.0	9.963
10	2.0	0.308	152	5.5	10.763
12	1.5	0.302	152	6.0	11.563
12	2.0	0.384	152	6.5	12.363
14	1.5	0.365	168	5.5	11.563
14	2.0	0.469	168	6.0	12.363
16	1.5	0.426	168	6.5	13.163
16	2.0	0.542	168	7.0	13.963
18	1.5	0.491	180	6.0	13.163
18	2.0	0.628	180	6.5	13.963
20	1.5	0.559	180	7.0	14.763
20	2.0	0.716	180	7.5	15.563
22	1.5	0.628	194	6.5	14.763
22	2.0	0.811	194	7.0	15.563
25	1.5	0.711	194	7.5	16.363
25	2.0	0.914	194	8.0	17.163
25	2.5	1.081	219	7.0	16.363
25	3.0	1.248	219	7.5	17.163
32	2.0	1.133	219	8.0	17.963
32	2.5	1.373	219	8.5	18.763
32	3.0	1.613	245	7.5	17.963
32	3.5	1.853	245	8.0	18.763
38	2.0	1.373	245	8.5	19.563
38	2.5	1.613	245	9.0	20.363
38	3.0	1.853	273	8.0	19.563
38	3.5	2.093	273	8.5	20.363
45	2.5	1.853	273	9.0	21.163
45	3.0	2.162	273	9.5	21.963
45	3.5	2.471	325	8.5	21.963
45	4.0	2.781	325	9.0	22.763
50	2.5	1.983	325	9.5	23.563
50	3.0	2.323	325	10.0	24.363
50	3.5	2.663	377	9.0	23.563
50	4.0	3.003	377	9.5	24.363
57	2.5	2.273	377	10.0	25.163
57	3.0	2.633	377	10.5	25.963
57	3.5	3.003	426	9.5	25.163
57	4.0	3.373	426	10.0	25.963
60	2.5	2.393	426	10.5	26.763
60	3.0	2.793	426	11.0	27.563
60	3.5	3.193	480	10.0	26.763
60	4.0	3.593	480	10.5	27.563
76	3.0	3.063	480	11.0	28.363
76	3.5	3.563	480	11.5	29.163
76	4.0	4.063	530	10.5	28.363
76	4.5	4.563	530	11.0	29.163
89	3.5	4.063	530	11.5	29.963
89	4.0	4.663	530	12.0	30.763
89	4.5	5.263	630	11.5	30.763
89	5.0	5.863	630	12.0	31.563
108	4.0	5.863	630	12.5	32.363
108	4.5	6.563	630	13.0	33.163
108	5.0	7.263	720	12.0	32.363
108	5.5	7.963	720	12.5	33.163
114	4.0	6.163	720	13.0	33.963
114	4.5	6.863	720	13.5	34.763
114	5.0	7.563	820	12.5	33.963
114	5.5	8.263	820	13.0	34.763
127	4.5	7.563	820	13.5	35.563
127	5.0	8.363	820	14.0	36.363
127	5.5	9.163	920	13.0	35.563
127	6.0	9.963	920	13.5	36.363
133	4.5	7.963	920	14.0	37.163
133	5.0	8.763	920	14.5	37.963
133	5.5	9.563	1020	13.5	37.163
133	6.0	10.363	1020	14.0	37.963
140	4.5	8.363	1020	14.5	38.763
140	5.0	9.163	1020	15.0	39.563
140	5.5	9.963	1220	14.5	39.563
140	6.0	10.763	630	13.0	33.163
108	4.5	6.563	720	12.0	32.363
108	5.0	7.263	720	12.5	33.163
108	5.5	7.963	720	13.0	33.963
114	4.0	6.163	720	13.5	34.763
114	4.5	6.863	820	12.5	33.963
114	5.0	7.563	820	13.0	34.763
114	5.5	8.263	820	13.5	35.563
127	4.5	7.563	820	14.0	36.363
127	5.0	8.363	920	13.0	35.563
127	5.5	9.163	920	13.5	36.363
127	6.0	9.963	920	14.0	37.163
133	4.5	7.963	920	14.5	37.963
133	5.0	8.763	1020	13.5	37.163
133	5.5	9.563	1020	14.0	37.963
133	6.0	10.363	1020	14.5	38.763
140	4.5	8.363	1020	15.0	39.563
140	5.0	9.163	1220	14.5	39.563
140	5.5	9.963	1220	15.0	40.363
140	6.0	10.763	1220	15.5	41.163

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