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  • ASTM A556 Grade C2 Feedwater Heater Tubes
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  • ASTM A556 Grade C2 Seamless Cold-Drawn Feedwater Heater Tubes
    Standard Specification for Seamless Cold-Drawn Carbon Steel Feedwater Heater Tubes
    ASTM A556 Grade C2 Steel Tubes  covers minimum-wall-thickness,seamless cold-drawn carbon steel tubes including bending into the form of U-tubes, for use in tubular feedwater heaters.
    ASTM A556 Grade C2 Seamless Cold-Drawn Feedwater Heater Tubes sizes covered shall be 5 ⁄ 8 to 1 1 ⁄ 4 -in. [15.9 to 31.8-mm] outside diameter, inclusive, with minimum wall thicknesses equal to or greater than 0.045 in. [1.1 mm].

    ASTM A556 Grade C2 Cold-Drawn Feedwater Heater Tubes Quick Details
    Company Name: beite steel pipe
    Country/Region: China
    Product Name:ASTM A556 Grade A2  Feedwater Heater Tubes
    Manufacture:Seanmless And Cold drawn.
    Outside Diameter:15.9mm——38.1mm
    Wall thickness:1.1mm——5mm
    Length:6000mm、12000m or specified length as require
    Port of Shipment:Tianjin,China
    Payment:L/C or T/T
    Delivery: 7-15 days after payment
    Package: Bundles (hexagonal),Wooden Boxes,Crates (steel/wooden)
    ASTM A556 Grade C2 Seamless Cold-Drawn Feedwater Heater Tubes are made by the seamless process and shall be cold drawn.

    Heat Treatment:
    ASTM A556 Grade C2 Seamless Cold-Drawn Feedwater Heater Tubes are heat treated after the final cold-draw pass at a temperature of 1200°F [640°C] or higher to ensure ductility satisfactory for rolling into tube sheets and to meet mechanical properties as specified.
    If stress-relief anneal of the U-bends is specified, the anneal shall consist of heating the bent portion within a range of 1100 to 1200°F [585 to 640°C].

    Chemical Composition
    Element Composition, %
    Grade C2
    Carbon, max  0.30
    Manganese 0.27–1.06
    Phosphorus, max 0.035 
    Sulfur, max  0.035 
    Silicon, min  0.10
    Mechanical Properties


      Grade C2
    Tensile strength, min, ksi [MPa]  70 [480] 
    Yield strength, min, ksi [MPa] 40 [280] 
    Elongation in 2 in. or 50 mm, min, % (longitudinal)
    Hardness HR B 89
    Tolerances of ASTM A556 Grade C2 Feedwater Heater Tubes
    Hot finished
    OD +/- 1%
    WT +/-12.5%
    Cold finished
    OD +/-0.75%
    WT +/-10%
    Mechanical Tests 
    Tension Test
    Flattening Test
    Flaring Test
    Hardness Test
    Hydrostatic Test
    Bundles (hexagonal),
    Wooden Boxes,
    Crates (steel/wooden)
    The tubing be packaged or bundled in such a manner as to prevent damage in ordinary handling and transportation and identified by a tag with the name of the manufacturer, purchase order number, specification number and grade, and size.
    Ordering Information
    1 Orders for material include the following as required to describe the desired material adequately:
    1.1 Quantity (feet, metres, or number of pieces),
    1.2 Name of material (seamless steel tubing),
    1.3 Dimensions (outside diameter and minimum wall thickness),
    1.4 Length (specific or random),
    1.5 Manufacture (cold drawn),
    1.6 Grade (chemical composition),
    1.7 Test report required 
    1.8 Specification number, and
    1.9 Special requirements and any supplementary requirements selected.


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