Seamless carbon steel pipes

Different types and grades of carbon steel tubes have different chemical and physical properties, and each type of carbon steel tube has different characteristics and application fields. Central Steel is a professional carbon steel pipe manufacturer and supplier with the grade, size and price to suit your needs. The following is Central Steel's description of the characteristics, specifications and applications of different grades of seamless carbon steel pipes:

Common standards and grades

A/SA106-Grades B & C

ASTM A106 and ASME SA106 cover seamless carbon steel pipes for high temperature service. Commonly used in the construction of oil and gas refineries, power plants, petrochemical plants, boilers and ships, these pipelines are suitable for transporting fluids and gases with high temperature and pressure levels.

Chemical composition:

	Grade A	Grade B	Grade C
Carbon max. %	0.25	0.30	0.35
Manganese %	0.27 to 0.93	0.29 to 1.06	0.29 to 1.06
Phosphorous, max. %	0.035	0.035	0.035
Sulfur, max. %	0.035	0.035	0.035
Silicon, min.%	0.10	0.10	0.10
Chrome, max. %	0.40	0.40	0.40
Copper, max. %	0.40	0.40	0.40
Molybdenum, max. %	0.15	0.15	0.15
Nickel, max. %	0.40	0.40	0.40
Vanadium, max.%	0.08	0.08	0.08

Mechanical properties:

	Grade A	Grade B	Grade C
Tensile Strength, min., psi	48,000	60,000	70,000
Yield Strength, min., psi	30,000	35,000	40,000

A/SA53-Grade B

ASTM A53 and ASME SA53 are suitable for mechanical and pressure applications, as well as for general use in steam, water, gas and air lines.

Chemical composition:

	Grade A	Grade B
Carbon max. %	0.25	0.30
Manganese %	0.95	1.2
Phosphorous, max. %	0.05	0.05
Sulfur, max. %	0.045	0.045
Chromium, max. %	0.40	0.40
Copper, max. %	0.40	0.40
Molybdenum, max. %	0.15	0.15
Nickel, max. %	0.40	0.40
Vanadium, max.%	0.08	0.08

Mechanical properties:

	Grade A	Grade B
Tensile Strength, min., psi	48,000	60,000
Yield Strength, min., psi	30,000	35,000

API 5L Grades B, X42, X52, X65

Pipeline steel, suitable for oil, gas and liquid transportation. The higher the grade, the higher the strength.

Chemical composition:

	Grade B	X42	X52	X60	X65	X70
Carbon max. %	0.24	0.24	0.24	0.26	0.26	0.26
Manganese %	1.2	1.4	1.4	1.4	1.65	1.65
Phosphorous, max. %	0.03	0.03	0.03	0.03	0.03	0.03
Sulfur, max. %	0.03	0.03	0.03	0.03	0.03	0.03

Mechanical properties:

	Grade B	X42	X52	X60	X65	X70
Tensile Strength, min.,MPa	415 - 655	415 - 655	460 - 760	520 - 760	535 - 760	570 - 760
Yield Strength, min.,MPa	245	290	360	415	450	485

Carbon steel pipe selection basis

1. Use environment

High temperature environment: A/SA106 B/C grade is preferred because of its excellent high temperature resistance.
Long distance transport: Choose API 5L pipeline for efficient transport of liquids and gases.

2. Pressure and strength requirements

Medium and low voltage systems: Use A/SA53 seamless B class.
High voltage system: Choose A/SA106 C or API 5L X.

3. Corrosion and fatigue properties

For corrosive environments, the corrosion resistance of carbon steel pipes can be improved by external coating or lining treatment.

Conclusion

According to the requirements of the application, it is important to select the appropriate grade of carbon steel pipe. Different grades of carbon steel tubing provide reliable solutions for structural support, energy delivery and industrial production through their specific chemical and physical properties.