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ASTM A106 Grade C

TUSPIPE supplies high-strength seamless and welded steel pipes that meet ASTM A106 Grade C standards. Superior mechanical properties and stricter production control provide reliable performance under demanding, high-load conditions, ensuring safer engineering operations.

ASTM A106 Grade C

ASTM A106 Grade C

ASTM A106 Grade C is a standard developed by the American Society for Materials and Testing (ASTM) and is a steel grade of the ASTM A106 standard.

 

ASTM A106 Grade C is specifically designed for carbon steel tubes that transport liquids and gases under high temperature and pressure conditions. With its excellent high temperature resistance, it is widely used in the thermal transmission system of power stations, pipeline systems in the oil and gas industry.

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ASTM A106 Grade C

  • Outer Diameter Range: 6-406mm
  • Wall Thickness Range: 1.2-20mm
  • Length: Customizable
  • Processing: Cold Drawing + Annealing (Grade C only)
  • Testing: Hydrogen Embrittlement Resistance Exceeds Grade A/B
  • Note: Cold-drawn tubes are laser-engraved with the “N-T” logo.
  • Application: Suitable for precision hydraulic systems.
  • Tolerance: +10%/-8%
The ASTM A106 Grade C pipes we produce comply with international standards and can be customized to special sizes. Please email us if you have any requirements.

Types of ASTM A106 Grade C Pipes

- ASTM A106 Grade C Type S – Seamless Pipe

ASTM A106 Grade C Type S is a hot-rolled seamless steel pipe. Without the need for welding, this manufacturing process produces tubes with uniform wall thickness and excellent internal and external quality. Strength and corrosion resistance is better than welded pipe, often used in oil refineries, chemical equipment and power plant heat transmission system.

- ASTM A106 Grade C Type E – Electric Resistance Welded Pipe

ASTM A106 Grade C Type E piping uses the Resistance welding (ERW) manufacturing process for excellent weldability and is commonly used in piping systems with small diameters and thin pipe walls. For example, building structural plumbing systems and fluid transmission pipelines.

- ASTM A106 Grade C Type F - SAW, Submerged Arc Welded

ASTM A106 Grade C Type F steel pipe is manufactured using the welding melting (SAW) process, which is completed by the protection of a molten electrode and powder flux. ASTM A106 Grade C Type F steel pipe is commonly used in chemical equipment and other applications where corrosion resistance and strength are required.

Dimensions and Sizes of ASTM A106 Grade C Pipe

ASTM A106 Pipe Dimensions Chart ANSI B36. 10
NPS DN OD SCH SCH SCH SCH SCH SCH SCH SCH SCH SCH SCH SCH SCH
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

Chemical Composition of ASTM A53 Grade C Pipes

Carbono
max		 Manganeso Fósforo
max		 Azufre
max		 Silicio
min		 Cromo
max		 Cobre
max		 Molibdeno
max		 Níquel
max		 Vanadium
max
0.35% 0.29-1.06% 0.035% 0.035% 0.1% 0.4% 0.4% 0.15% 0.4% 0.08%

MECHANICAL PROPERTIES OF ASTM A106 GRADE B PIPES

Propiedades mecánicasGrado B
Tensile Strength，min，psi [MPa]70 000 [485]
Yield Strength，min，psi [MPa]40 000 [275]

TEST & INSPECTION DURING ASTM A106 GRADE C PIPE PRODUCTION

  • Chemical composition analysis – Spectral analysis and chemical analysis are commonly used to analyze the chemical composition of steel, including carbon content, phosphorus content, sulfur content (S), etc. The chemical composition directly affects the mechanical properties, corrosion resistance and weldability of the pipeline, which is the basis for ensuring the quality of the pipeline material.
  • Surfaces and dimensions – Visual inspection and evaluation of measuring instruments for dimensional accuracy and appearance quality of pipes, etc.
  • Mechanical properties testing – including yield testing, tensile testing, etc. Ensure that the pipeline can maintain good stability and load capacity in different environments.
  • Impact testing – The impact toughness of the pipeline is tested. Impact toughness tests assess the impact resistance of pipelines at low temperatures to ensure safe operation in cold environments.
  • Pressure test – Perform a water pressure test or air pressure test to check the tightness and pressure resistance of the pipeline. Ensure pipe tightness and pressure resistance.

TYPE OF ASTM A106 GRADE C PIPE ENDS

  • Welded Ends: Pipe ends are machined and connected to other parts of the pipe through a welding process. The Welding types include Butt Welding and Socket Welding.
  • Threaded Ends: machined internal or external threaded on pipe end to connect with other pipe components or fittings through threaded connections or threaded fittings. There are NPT, National Pipe Thread, G, BSPP and other different thread types.
  • Flanged Ends: The pipe ends are processed into flanged interfaces, which are fixed and sealed with other flanged parts or devices through flange connection bolts and gaskets. Select different flange types according to pressure rating and diameter. For example, Weld Neck Flange, Blind Flange and so on.

ASTM A106 GRADE C PIPE MARKING CONTENTS

ASTM A106 Grade C marking content should include the following:

  • ASTM A106 Grade Cpiping material identification
  • ASTM A106 standard number
  • ASTM A106piping manufacturer’s identifier
  • Dimensions and wall thickness identification
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