Carbon Steel Pipes
Heat Exchanger Tubes
U Bent Tube
Fin Tubes
SA556A2
SA556B2
SA556C2
Standard ASTM A556
Heat Exchanger
Shell and Tube Heat Exchanger
Feedwater Heater
Product

 

 

 

 

 


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ASTM A556/ASME SA556 Standard Specification for Seamless Cold-Drawn Carbon Steel Feedwater Heater Tubes
Standard: ASTM A556, ASME SA556
Material: SA556C2
Equivalent Materials: 25MnG, SA210C
Chemistry Composition
C, %
Mn, %
P, %
S, %
Si, %
0.30 max
0.29-1.06
0.035 max
0.035 max
0.10 min
Mechanical Properties
Tensile Strength , MPa
Yield Strength, MPa
Elongation, %
Hardness, HRB
480 min
280 min
30 min
89 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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