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A 556 / 556M Cold Drawn Carbon Feedwater Heater Seamless Steel Pipe Black

Categories Seamless Steel Tube
Brand Name: Torich
Model Number: A 556 / A 556M
Certification: ISO9001
Place of Origin: china
MOQ: 5 Ton
Price: USD1500-1800 per ton
Supply Ability: 60000 Ton/Year
Delivery Time: 30 days
Packaging Details: Packing in wooden, hexagonal box or other seaworthy ways
Color: Black
OD: 50mm-120mm
ID: 5mm-12mm
Material: Carbon steel tube
Technique: Cold Drawing
Shape: Round
Payment Terms: T/T L/C D/P D/A WesternUnion MoneyGram Others
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A 556 / 556M Cold Drawn Carbon Feedwater Heater Seamless Steel Pipe Black


A 556/A 556M Cold-Drawn Carbon Feedwater Heater Seamless steel Tubes


1. Referenced Documents
1.1 ASTM Standards:
A 450/A 450M Specification for General Requirements for Carbon, Ferritic Alloy, and Austenitic Alloy Steel Tubes E 30 Test Methods for Chemical Analysis of Steel, Cast Iron, Open-Hearth Iron, and Wrought Iron


2. Manufacture

2.1 Manufacture—Tubes shall be made by the seamless process and shall be cold drawn.

2.2 Heat Treatment:
2.2.1 Cold-drawn tubes shall be heat treated after the final cold-draw pass at a temperature of 1200°[640°C] or higher to ensure ductility satisfactory for rolling into tube sheets and to meet mechanical properties as specified.
2.2.2 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].


3. Chemical Composition
3.1 The steel shall conform to one of the requirements as to chemical composition as prescribed in Table 1. 3.2 When a grade is ordered under this specification, supplying an alloy grade that specifically requires the addition of any element other than those listed for the ordered grade in


TABLE 1 Chemical Requirements
ElementComposition, %
Grade A2Grade B2Grade c2
Carbon, max0.180.270.3
Manganese0.27-0.630.29-0.930.29-1.06
Phosphorus0.0350.0350.035
Sulfur, max0.0350.0350.035
Silicon, min...0.100.10

4. Permissible Variations in Dimensions (Fig. 1)
4.1 Permissible variations from the specified outside diametershall not exceed 0.004 in. [0.10 mm] for tubing under1.0-in. [25.4-mm] outside diameter nor 0.006 in. [0.15 mm]for tubing 1.0 in. [25.4 mm] to 1.25 in. [31.7 mm] inclusive.These tolerances do not apply to the bent portion of theU-tubes. At the bent portion of a U-tube for R = 2 D orgreater neither the major nor minor diameter of tube shalldeviate from nominal by more than 10 %. If 1 ⁄ D is specified,tolerances could be greater.
4.2 Permissible variations from the specified minimum wallthickness shall not exceed +20 % or −0. The wall thickness of

TABLE 2 Tensile Requirements
Grade A2Grade B2Grade C2
Tensile strength, min, ksi [MPa]47[320]60[410]70[480]
Yield strength, min, ksi [MPa]26[180]37[260]40[280]
Elongation in 2 in. or 50 mm,
min, % (longitudinal)
353030

TABLE 3 Hardness Requirements
Grade A2HR B 72
Grade B2HR B 79
Grade C2HR B 89

the tube in U-bent section shall be not less than valuedetermined by:
tf T 2R / 2R D (1)
where:
t = wall thickness after bending, in. [mm],
T = specified minimum tube wall thickness, in. [mm],
R = centerline bend radius, in. [mm], and
D = nominal outside tube diameter, in. [mm].


Quality A 556 / 556M Cold Drawn Carbon Feedwater Heater Seamless Steel Pipe Black for sale
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