ASME SA-556M C2 refers to a grade of seamless cold-drawn carbon steel tubes used for tubular water heaters in accordance with the ASME SA-556M standard.
These tubes are specifically designed for high-pressure applications and are commonly used in feedwater heater systems.
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.
The specification is similar to ASTM A556/A556M, which also covers seamless cold-drawn carbon steel tubes for use in tubular feedwater heaters, including bending into the form of U-tubes if specified.
ASME SA-556/SA-556M is a common standard specification for seamless cold-drawn carbon steel feedwater heater tubes. It covers minimum-wall-thickness.
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.
SA-556M C2 Seamless Steel Tube 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.
Cold-drawn tubes shall be heat treated after the final cold-draw pass at a temperature of1200°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].
| Grade | C | Si | Mn | P | S |
| SA-556M C2 | ≤0.30 | ≥0.10 | 0.29-1.06 | ≤0.035 | ≤0.035 |
| 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 |
When requested in the purchase order, a product analysis will be made by our from one tube or billet per heat.
ASTM A556 C2 U-bent steel tubes are seamless cold-drawn carbon steel tubes that are specifically designed for use in high-temperature heater systems, such as feedwater heaters.
These tubes undergo a cold-drawing process to ensure dimensional accuracy and a smooth surface finish.
The U-bend configuration of these tubes allows for efficient heat transfer in applications where space is limited. The U-bend shape enables the tubes to be easily installed and connected within the heater system.
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