ASTM A556 Superheater Steel Tube

ASTM A556 / A556M – 96(2012) Standard Specification for Seamless Cold-Drawn Carbon Steel Feedwater Heater Tubes

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• ASTM A 556 ]M - 88 / ASME 556 /ASTMA556M-88/ASME556
• 锅炉和过热器用无缝中碳钢管
• Cold Drawn Seamless Carbon Steel Tube ASTM A179
• Cold drawn seamless steel tube process

ASTM A556 is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.

Scope

1.1 This specification2 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.

1.2 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].

1.3 Optional supplementary requirements are provided, and when desired, shall be stated in the order.

1.4 The values stated in either inch-pound units or SI units are to be regarded separately as the standard. Within the text, the SI units are shown in brackets. The values stated in each system are not exact equivalents; therefore, each system must be used independently of the other. Combining values from the two systems may result in nonconformance with the specification.

• Related Standard: ASTM A556, ASME SA556
  
• Related Material: SA556Gr.B2, SA556Gr.C2

Descripition:

• Outside Diameter: 12-40mm
• Wall Thickness: 1-4mm
• Length: max length 27 meters

Method: Cold Drawn
Delivery Condition: NBK, Bright, U bending.

Chemistry Composition

Grade	C %	Si %	Mn %	P %	S %
B2	0.27 max	0.10 min	0.29-0.93	0.030 max	0.030 max
C2	0.30 max	0.10 min	0.29-1.06	0.030 max	0.030 max

Mechanical Properties

Grade	Tensile Strength MPa	Yield Strength MPa	Hardness HRB
B2	410 min	260 min	79 min
C2	480 min	280 min	89 min

Tolerances

Tolerances according to specification or according to agreement. Standard tolerances are:

Hot finished	OD +/- 1%	WT +/-12.5%
Cold finished	OD +/-0.75%	WT +/-10%

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