Superheater Steel Tubes, Feedwater Steel Tubes, SA556A2, SA556B2, SA556C2, ASTM A556, ASME SA556, U bending Tubes, U-bent Tubes, Bright Annealing Steel Tubes, BA Steel Tubes, Superheater Steel Tubing, Feedwater Steel Tubing

ASTM A556/ASME SA556 Standard Specification for Seamless Cold-Drawn Carbon Steel Feedwater Heater Tubes

Standard: ASTM A556, ASME SA556

Material: SA556B2
Equivalent Materials: 20MnG

Chemistry Composition

C, %	Mn, %	P, %	S, %	Si, %
0.27 max	0.29-0.93	0.035 max	0.035 max	0.10 min

Mechanical Properties

Tensile Strength , MPa	Yield Strength, MPa	Elongation, %	Hardness, HRB
410 min	260 min	30 min	79 max

Outside Diameter & Tolerance

Outside Diameter, mm	Tolerance, mm
OD＜25.4	±0.10
25.4≤OD≤38.1	±0.15

Wall thickness & Tolerance

Outside Diameter, mm	Tolerance, %
OD≤38.1	+20/-0

ASTM A556/A556M specification covers minimum-wall-thickness, seamless cold-drawn carbon steel tubes including bending into the form of U-tubes, if specified, for use in tubular feedwater heaters. The tubing sizes covered shall be 5⁄8 to 11⁄4-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].

Manufacture: 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].
Inspection & Test: tension test, flattening test, flaring test, hardness test, NDT, surface inspection and dimension check.

Length: 11800mm; 12000mm; 16000mm; 18000mm; 20000mm; and so on.
Max length: 27000mm, also U bending can be offered.

Keyword: superheater steel tube, feedwater steel tube, ASTM A556, ASME SA556

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