ASTM A106 STEEL PIPE-GRADE A/B/C PIPE

TUSPIPE supplies carbon steel pipes that are certified to the ASTM A106 standard. ASTM A106 Grade A, ASTM A106 Grade B, and ASTM A106 Grade C are available. Specific dimensions can be found in the ASTM A106 steel pipe size chart below.

ASTM A106

ASTM A106 is a seamless steel pipe standard developed by the American Society for Materials and Testing (ASTM), and the standard steel pipe is mainly responsible for the high temperature and high pressure environmental conditions of the transport of fluids. Its excellent physical and chemical properties make it widely used in a variety of industrial fields.

ASTM A106 steel pipe mainly covers three grades: Grade A, Grade B, and Grade C. The ASTM A106 pipe process is mainly seamless, which ensures the pipe’s high-pressure resistance and reduces the risk of piping system. TUSPIPE produces pipes that are hydrostatically tested, non-destructively tested electrically, and mechanically tested to ensure the quality of the pipe.

ASTM A106 Pipe RANGE

Our factory produces ASTM A106 pipe using both hot-rolled and cold-drawn processes. Below is the size range of our pipes. Custom pipes are available. Please contact us if you have any inquiries.

Size Range: OD 10.3mm to 1219mm (NPS 1/8″ to 48″)
Pressure Rating: SCH40-SCH160
Wall Thickness Range: 1.24mm to 48.26mm
Steel Grade: Grades A/ B/ C
Temperature Range: -29°C to 650°C
Yield Strength: ≥240MPa
Processing: Seamless pipe suitable for high-temperature applications, using both hot-rolled and cold-drawn processes.
High-Temperature Stability: Carbon Equivalent (CE ≤ 0.45) and P/S content (P ≤ 0.035%, S ≤ 0.035%) maintain oxidation resistance above 538°C.

ASTM A106 STEEL PIPE GRADE

The ASTM A106 standard classifies seamless carbon steel pipe into three grades: A, B, and C. The main differences are in the chemical composition and mechanical properties.The ASTM A106 standard has specifications for each steel grade of pipe to ensure the reliability of the pipe.

ASTM A106 is one of the most common seamless steel pipe standards and is often used in oil and gas transportation.
TUSPIPE steel pipe mills, can offer a full range of B/C steel grade pipes in ASTM A106 standard.
Sizes range from NPS 1/8“ to NPS 48”.
Wall thicknesses from .188“ up to .4”.
If you have other requirements, you can contact us for pipe quotes and sizes.

ASTM A106 standard is used to regulate the manufacturing and use requirements of seamless carbon steel pipes. The standard has been continuously amended and updated to continuously improve the quality and performance requirements of the pipe. The ASTM A106 specification covers the material, manufacturing process, steel grade, size, physical and chemical properties of the pipe.

ASTM A106 Pipe Size Chart

NPS	DN	OD	SCH	SCH	SCH	SCH	SCH	SCH	SCH	SCH	SCH	SCH	SCH	SCH	SCH
ASTM A106 파이프 치수 차트 ANSI B36. 10
NPS	DN	OD	10	20	30	Sth	40	60	XS	80	100	120	140	160	XXS
1/8	6	10.3	1.24		1.45	1.73	1.73		2.41	2.41
1/4	8	13.7	1.65		1.85	2.24	2.24		3.02	3.02
3/8	10	17.1	1.65		1.85	2.31	2.31		3.2	3.2
1/2	15	21.3	2.11		2.41	2.77	2.77		3.73	3.73				4.78	7.47
3/4	20	26.7	2.11		2.41	2.87	2.87		3.91	3.91				5.56	7.82
1	25	33.4	2.77		2.9	3.38	3.38		4.55	4.55				6.35	9.09
1 1/4	32	42.2	2.77		2.97	3.56	3.56		4.85	4.85				6.35	9.7
1 1/2	40	48.3	2.77		3.18	3.68	3.68		5.08	5.08				7.14	10.15
2	50	60.3	2.77		3.18	3.91	3.91		5.54	5.54				8.74	11.07
2 1/2	65	73	3.05		4.78	5.16	5.16		7.01	7.01				9.53	14.02
3	80	88.9	3.05		4.78	5.49	5.49		7.62	7.62				11.13	15.24
3 1/2	90	101.6	3.05		4.78	5.74	5.74		8.08	8.08
4	100	114.3	3.05		4.78	6.02	6.02		8.56	8.56		11.13		13.49	17.12
5	125	141.3	3.4			6.55	6.55		9.53	9.53		12.7		15.88	19.05
6	150	168.3	3.4			7.11	7.11		10.97	10.97		14.27		18.26	21.95
8	200	219.1	3.76	6.35	7.04	8.18	8.18	10.31	12.7	12.7	15.09	18.26	20.62	23.01	22.23
10	250	273	4.19	6.35	7.8	9.27	9.27	12.7	12.7	15.09	18.26	21.44	25.4	28.58	25.4
12	300	323.8	4.57	6.35	8.38	9.53	10.31	14.27	12.7	17.48	21.44	25.4	28.58	33.32	25.4
14	350	355.6	6.35	7.92	9.53	9.53	11.13	15.09	12.7	19.05	23.83	27.79	31.75	35.71
16	400	406.4	6.35	7.92	9.53	9.53	12.7	16.66	12.7	21.44	26.19	30.96	36.53	40.49
18	450	457	6.35	7.92	11.13	9.53	14.27	19.05	12.7	23.83	29.36	34.93	39.67	45.24
20	500	508	6.35	9.53	12.7	9.53	15.09	20.62	12.7	26.19	32.54	38.1	44.45	50.01
22	550	559	6.35	9.53	12.7	9.53		22.23	12.7	28.58	34.93	41.28	47.63	53.98
24	600	610	6.35	9.53	14.27	9.53	17.48	24.61	12.7	30.96	38.89	46.02	52.37	59.54
26	650	660	7.92	12.7		9.53			12.7
28	700	711	7.92	12.7	15.88	9.53			12.7
30	750	762	7.92	12.7	15.88	9.53			12.7
32	800	813	7.92	12.7	15.88	9.53	17.48		12.7
34	850	864	7.92	12.7	15.88	9.53	17.48		12.7
36	900	914	7.92	12.7	15.88	9.53	19.05		12.7
38	950	965				9.53			12.7
40	1000	1016				9.53			12.7
42	1050	1067				9.53			12.7
44	1100	1118				9.53			12.7
46	1150	1168				9.53			12.7
48	1200	1219				9.53			12.7

Mechanical Properties of ASTM A106

The physical properties of ASTM A106 seamless steel pipe are directly related to its bearing capacity and safety in practical applications. Generally include yield strength, tensile strength, elongation and so on.

	A등급	B등급	C등급
기계적 특성
인장 강도, 최소, psi [MPa]	48 000 [330]	60 000 [415]	70 000 [485]
항복 강도, 최소, psi [MPa]	30 000 [205]	35 000 [240]	40 000 [275]

Chemical Composition (%) of ASTM A106

ASTM A106 Seamless steel pipe strictly follows the chemical composition requirements of ASTM A106 standard. Each element composition is strictly controlled in the production process to ensure that the pipe meets the performance requirements. The main chemical composition of ASTM A106 standard steel pipe is carbon, manganese, phosphorus, sulfur, silicon and other elements.

	A등급	B등급	C등급
Chemical Composition %
Carbon，max	0.25	0.3	0.35
망간	0.27-0.93	0.29-1.06	0.29-1.06
Phosphorus，max	0.035	0.035	0.035
Sulfur，max	0.035	0.035	0.035
Silicon，min	0.1	0.1	0.1
Chromium，max	0.4	0.4	0.4
Copper，max	0.4	0.4	0.4
Molybdenum，max	0.15	0.15	0.15
Nickel，max	0.4	0.4	0.4
Vanadium，max	0.08	0.08	0.08

ASTM A106 Core Manufacturing Process

Comparison of Hot Rolling and Cold Drawing Processes

열간 압연
Main composition: Ferrite + pearlite banding
Processing temperature: 900-1200°C
Deformation: 30-50%
Surface roughness: 12.5-25μm
Residual stress: 150-300 MPa
Non-metallic inclusions: Class B ≤ Grade 1.5
Tolerance: ±1%

콜드 드로잉

Main composition: Deformed ferrite
Processing temperature: Room temperature – 300°C
Deformation: 15-30%
Surface roughness: 0.8-3.2μm
Residual stress: 400-600 MPa
Tolerance: ±0.5%

For temperatures > 300°C and pipe diameters > DN300, hot-rolled pipes can be selected. For operating pressures > 6 MPa and at room temperature, cold-drawn pipes can be selected.

ASTM A106 Production Process and Quality Control

Smelting process: It can be smelted by alkaline oxygen furnace, electric arc furnace or flat furnace, with optional vacuum degassing refining.
Forming method: Hot rolling process and cold drawing process are used, precision size needs to be through the heat treatment of not less than 650 ℃ to eliminate stress.
Heat treatment requirements: Hot rolled tubes can be heat treated to enhance performance, cold drawn tubes must be annealed.

ASTM A106 Testing Program

Non-destructive testing (NDT): Eddy current testing and ultrasonic testing.
Destructive testing: Tensile test, flattening test, hardness test.
Surface quality: No defects such as cracks and folds on the inner and outer walls as required by SSPC-SP6 surface treatment standards.

ASTM A106 Pipe Selection Guide

Regular working conditions: Grade B (best price/performance ratio, covering 80% of industrial needs).

Ultra-high pressure environments: Grade C (e.g., power station main steam piping).

Corrosion risk: additional requirements (e.g., S2 carbide control).

ASTM A106 Steel Pipe Ordering Information and Technical Services

Standardized ordering parameters

- Size range: OD 10.3 mm (NPS 1/8) to 1219 mm (NPS 48).
- Wall thickness tolerances: ±12.5% (standard grade), ±10% (customized for high precision).
- Length options: random length (6-12 meters) or cut-to-length (tolerance to be specified).

Value-added services

- Third party certification: Provide BV, SGS, TUV inspection report.
- Special processing: beveling, anti-corrosion coating (epoxy/galvanized).
- Logistic support: bundling and packaging (MIL-STD-163 standard), export commodity inspection.

애플리케이션 시나리오

ASTM A106 is used in a wide range of applications. In the oil and gas industry, ASTM A106 seamless steel pipes are often used for the transportation of oil and gas under high temperature and pressure environments. In the construction industry, it is widely used in the manufacture of water supply and drainage, heating and air conditioning systems. It is used in the power industry for the transportation of high-temperature fluids such as steam and hot water.