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    Carbon steel seamless pipes

    The properties of carbon steel are high hardness, strength, wear resistance and anti-corrosion. The percentage of carbon in the steel affects the hardness, strength of elasticity and ductility of carbon steel.

    Carbon steel is an alloy with carbon and iron, with carbon content up to 2.1% by weight. The increase in the carbon percentage will raise steel’s hardness and strength, but it will be less ductile.

    Carbon steel has good properties in hardness and strength, and it is less expensive than other steels.

    Application

    Carbon steel seamless pipes are extensively applied in the nuclear device, gas conveyance, petrochemical, shipbuilding and boiler industries, with characteristics of high corrosion resistance combined with suitable mechanical properties.

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    Carbon steel specification, Standard and identification

    Carbon steel pipe tubing is used to transport fluids and gases in a variety of pneumatic, hydraulic, and process applications.

    Available Specification
    API SPEC 5CT
    Product Name Executive Standard Dimension (mm) Steel Code / Steel Grade
    Casting API 5CT ?114~219 x WT5.2~22.2 J55, K55, N80, L80, P110
    Tubing API 5CT ?48.3~114.3 x WT3.2~16 J55, K55, N80, L80, P110
    API SPEC 5L
    Product Name Executive Standard Dimension (mm) Steel Code / Steel Grade
    Line Pipes API 5L ?10.3~1200 x WT1.0~120 A, B, X42, X46, X52, X60, X70, X80, PSL1 / PSL2
    ASTM / ASME
    Product Name Executive Standard Dimension (mm) Steel Code / Steel Grade
    ?Black and Hot-Dipped Zinc-Coated Seamless Steel Pipes ASTM A53 ?10.3~1200 x WT1.0~150 Gr.A, Gr.B, Gr.C
    Seamless Carbon Steel Pipes for High Temperature Service ASTM A106 ?10.3~1200 x WT1.0~150 Gr.B, Gr.C
    Seamless Cold-Drawn Low-Carbon Steel Heat-Exchanger and Condenser Tubes ASTM A179 ?10.3~426 x WT1.0~36 Low Carbon Steel
    Seamless Carbon Steel Boiler Tubes for High Pressure ASTM A192 ?10.3~426 x WT1.0~36 Low Carbon Steel
    Seamless Cold-Drawn Intermediate Alloy Steel Heat-Exchanger and Condenser Tubes ASTM A199 ?10.3~426 x 1.0~36 T5, T22
    Seamless Medium-Carbon Steel Boiler and Superheater Tubes ASTM A210 ?10.3~426 x WT1.0~36 A1, C
    Seamless Ferritic and Austenitic Alloy Steel Boiler, Superheater and Heat-Exchanger Tubes ASTM A213 ?10.3~426 x WT1.0~36 T5, T9, T11, T12, T22, T91
    Seamless Carbon and Alloy Steel for Mechanical Tubing ASTM A333 ?1/4"~42" x WT SCH20~XXS Gr.1, Gr.3, Gr.6
    Seamless and Welded Carbon Steel Pipes and Alloy Steel Pipes for Low Temperature Use ASTM A334 ?1/4"~4" x WT SCH20~SCH80 Gr.1, Gr.6
    Seamless Cold-Drawn Carbon Steel Feedwater Heater Tubes ASTM A556 ?10.3~426 x WT1.0~36 A2, B2
    DIN
    Product Name Executive Standard Dimension (mm) Steel Code / Steel Grade
    Seamless Steel Tubes for Elevated Temperature DIN 17175 ?10~762 x WT1.0~120 St35.8, St45.8, 10CrMo910, 15Mo3, 13CrMo44, STPL340, STB410, STB510, WB36
    Seamless Steel Tubes DIN 1629 / DIN 2391 ?13.5~762 x WT1.8~120 St37.0, St44.0, St52.0, St52.3
    Seamless Steel Tubes DIN 2440 ?13.5~165.1 x WT1.8~4.85 St33.2
    Seamless Steel Pipes for Structural Purpose DIN 2393 ?16~426 x WT1.0~36 RSt34-2, RSt37-2, RSt44-2, St52
    BS
    Product Name Executive Standard Dimension (mm) Steel Code / Steel Grade
    Seamless Steel Tubes for Machine Structure BS 970 ?10~762 x WT1.0~120 Carbon Steel
    Seamless Steel Tubes for Boiler and Heat Exchangers BS 3059 ?10~762 x WT1.0~120 360, 410, 440, 460, 490

    Carbon steel pipes for cooling

    Carbon steel pipe cooling?method varies with the material. For most kinds of steel use natural cooling to meet the requirements.

    The application and uses of carbon steel pipe

    Carbon steel pipe is the most commonly and widely used in the gas project field.
    The large diameter coated steel pipes are widely used in tap water, natural gas, petroleum, chemical, pharmaceutical, telecommunications, electricity, large diameter steel marine engineering field generally less than the outer diameter of the tubes 89 are collectively referred to as small-diameter steel pipe.

    Carbon steel tube mechanical properties

    Carbon steel tube mechanical properties is generated in the carbon steel smelting defect smelting and casting process, such as segregation, non-metallic inclusions, porosity, shrinkage and cracks.

    Carbon steel pipe rusting

    Carbon steel pipe anti-rust oil: it is with a high corrosion resistance and adhesion,which does not contain harmful substances such as formaldehyde, benzene, heavy metals, environmental protection and the operator's physical and mental health.

    Carbon steel pipe density

    Density?is calculated by dividing the mass by the volume. The density of?carbon steel?is approximately 7.85 g/cm3 (0.284 lb/in3).

    The heat treatment of carbon steel pipe

    Improving the performance of the steel is two ways, First, adjusting the chemical composition of the steel alloying; the other is the heat treatment, heat treatment and shaping deformation combination of approaches. In the field of modern industrial technology, heat treatment to improve the performance of the steel still occupy a dominant position.

    Carbon steel advantages and disadvantages in piping

    Advantages of carbon steel: smelting process is relatively simple, low cost, good pressure processing performance, good cutting performance and good mechanical properties.

    Seamless carbon steel pipe hardness test method

    Inner diameter of seamless steel pipe is more than 6.0mm and wall thickness is less than 13mm annealed seamless steel pipe material, which can be used W-B75 Webster Hardness test with very fast, easy, suitable for rapid non-destructive of the seamless steel pipe material qualified inspection.

    Low carbon steel

    Low carbon steel is a type of metal that has an alloying element made up of a relatively low amount of carbon. Typically, it has a carbon content that ranges between 0.05% and 0.30% and a manganese content that falls between 0.40 and 1.5%. Low carbon steel is one of the most common types of steel used for general purposes, in part because it is often less expensive than other types of steel.

    Carbon steel pipe rusting

    Carbon steel pipe anti-rust oil: it is with a high corrosion resistance and adhesion,which does not contain harmful substances such as formaldehyde, benzene, heavy metals, environmental protection and the operator's physical and mental health.

    Brinell hardness of carbon steel pipe

    Brinell hardness?(HB) with a certain diameter of the steel balls or tungsten carbide balls, pressed into the pattern surface of a predetermined test force (F), after the predetermined hold time after drop test force, the diameter of the measurement sample surface indentation (L).

    Difference between carbon steel and alloy steel

    Steel is an alloy that mostly contains iron. But its properties can be changed to suit specific requirements by adding certain other elements.

    Analysis on the weld defects on the low carbon steel pipeline

    Encountered hole problems are very common in the welding process, welding materials drying, corrosion of the base metal and welding consumables, welding process is not stable enough oil and impurities and to protect the poor will be varying degrees of blowholes.

    How to control welding gap for carbon steel pipe

    The strip is into the welded pipe unit and by the multi-channel roll rolling, gradually rolled strip steel, formed with an opening gap round tube, adjust the amount of reduction squeeze rollers, so that the?weld gap control for carbon steel pipe?in 1 ~ 3mm, and to weld ends flush. If the gap is too large and will result in reduced proximity effect, eddy current lack of heat, poor weld joint between grain yield incomplete fusion or cracking.

    Carbon steel pipe standard length

    Delivery standard length of carbon steel pipe, also known as user requirements length or the length of the contract, there are four provisions in the existing standards

    Carbon steel internal defects

    Carbon steel internal defects is generated in the carbon steel smelting defect smelting and casting process, such as segregation, non-metallic inclusions, porosity, shrinkage and cracks.

    Carbon steel tube mechanical properties

    Carbon steel tube mechanical properties is generated in the carbon steel smelting defect smelting and casting process, such as segregation, non-metallic inclusions, porosity, shrinkage and cracks.

    Carbon steel defect

    Carbon steel defect is caused by the equipment, processes and operations in carbon steel smelting and rolling (forging) process, including scarring, cracks, residual shrinkage, layered, white point, segregation, non-metallic inclusions, such as osteoporosis and banded.

    EN10025(93) S235JR(G2),S235 J0,S235J2G3,S235J2G4

    For S235 steel , S means structural . 235 mean it's yield strength should be more than 235 MPa. The steel grades S235 may be supplied in qualities JR, JR(G2),J0,J2, J2G3,J2G4.

    S235 grade steel is a readily weldable low carbon manganese steel with good impact resistance (including in sub-zero temperatures).

    This material is commonly supplied in the untreated or normalised condition and is available in several variations (denoted by additional letters and/or digits), which offer slight modifications of chemical composition and mechanical properties.

    Machinability of this material is similar to that of mild steel.

    • JR means impact test at 20 degree.
    • J0 means impact test at 0 degree
    • J2 means impact test at -20 degree.

    Delivery condition of S235 steel has :

    Normalizing rolling (+N) : rolling process in which the final deformation is carried out in a certain temperature range leading to a material condition equivalent to that obtained after normalizing so that the specified values of the mechanical properties are retained even after normalizing.

    as-rolled(+AR): delivery condition without any special rolling and/or heat treatment condition.

    thermomechanical rolling: rolling process in which the final deformation is carried out in a certain temperature range leading to a material condition with certain properties which cannot be achieved or repeated by heat treatment alone.

    If you are interested to know more information about S235JR(G2),S235 J0,S235J2G3, S235J2G4 steel, please contact our sales team.

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    Seamless pipe Specification, standard and identification

    Seamless pipes are extensively applied for the nuclear device, gas, petrochemical, ship building and boiler industries. Seamless pipes dominates 65% of market share in Chinese boiler industry.

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    SUNNY STEEL

    Our team are highly trained and experienced in servicing and producing all types of steel supplies. Whether you've got a large construction project, or need parts for industrial machinery, our team of steel fabrication consultants will ensure that your project is provided with the parts you need, when you need them.

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