ASME SA-556M Grade C2 Seamless Cold-Drawn Tubes
ASME SA-556M Grade C2 Seamless Cold-Drawn Tubes
SA-556M C2 is a pearlescent carbon steel used for tubular water heater in ASME SA-556m standard, which is divided into straight tubes and tubes which are required to be bent into "U" shape.
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SA-556M C2 is close to 20MnG and 25MnG in GB5310 in China. It is mainly used for manufacturing 300, 600MW and other high-pressure heaters. In China, the annual demand of SA-556M C2 steel tubes are about 10000 tons.
ASME SA-556M Grade C2 Seamless Cold-Drawn Tubes Quick Details
Manufacture:Seamless process
Outer diameter: 12.7mm-38.1mm
Wall thickness: 0.5mm-3.0mm
Ends: Plain End, Beveled End, Treaded
Additional Info
Port of Shipment: Tianjin, China
Payment Terms:T / T, LC
Delivery: 7-15 days after payment
Surface: Tubes will be varnished to prevent rust.
Marking: Standard + Steel Grade + Size + Heat No + Lot No
Package: Bundles (hexagonal),Wooden Boxes,Crates (steel/wooden) or as required
Technical standard requirements
Chemical composition of SA-556M Grade C2 steel tubes
Grade | C | Si | Mn | P | S |
SA-556M C2 | ≤0.30 | ≥0.10 | 0.29-1.06 | ≤0.035 | ≤0.035 |
Mechanical properties of SA-556M Grade C2 steel tubes
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) | 30 |
Hardness | HR B 89 |
Manufacture
SA-556M Grade C2 Tubes shall be made by the seamless process and shall be cold drawn.
Heat Treatment:
Cold-drawn tubes shall be 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].
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