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A 556 / A 556m Grade A2 Seamless Boiler Tubes Carbon Steel

precision seamless boiler tubes

a 556 seamless boiler tubes

precision carbon steel boiler tubes

Place of Origin:

China

Brand Name:

Torich

Certification:

ISO9001

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Product Details

Application:

Boiler

Grade:

A2, B2, C2

Supply Ability:

60000 Ton Per Year

Standard:

ASTM A556

Highlight:

precision seamless boiler tubes

a 556 seamless boiler tubes

precision carbon steel boiler tubes

Payment & Shipping Terms

Minimum Order Quantity

2Ton

Price

USD2000-3000

Packaging Details

PACKING WOODEN CASE

Delivery Time

30-45

Payment Terms

L/C,D/A,D/P,T/T

Supply Ability

50000Ton per years

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Product Description

A 556/A 556M Grade A2 Seamless Carbon Steel Boiler Tubes for Boiler Pipe

1.Standard Scope

1.1 This specifification2 covers minimum-wall-thickness,seamless cold-drawn carbon steel tubes

including bending into the form of U-tubes, if specifified,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.

2.Manufacture

(1)Manufactur-------Tubes shall be made by the seamless process and shall be cold drawn.

(2 )Heat Treatment:

2.2.1 Cold-drawn tubes shall be heat treated after the fifinal cold-draw pass at a temperature

of 1200°F[640°C] or higher to ensure ductility satisfactory for rolling into tube sheets and tomeet

mechanical properties as specifified.

2.2.2 If stress-relief anneal of the U-bends is specifified, the anneal shall consist of heating the bent

portion within a range of 1100 to 1200°F [585 to 640°C].

3.Chemical Requirement :

Element	Composition ,%
Element	Grade A2	Grade B2	Grade C2
Carbon, max	0.18	0.27	0.30
Manganese	0.27-0.63	0.29-0.93	0.29-1.06
Phosphorus, max	0.035	0.035	0.035
Sulfur, max	0.035	0.035	0.035
Silicon , min	...	0.10	0.10

4.Tensile Requirements:

	Grade A2	Grade B2	Grade 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 50min, min,%(longitudinal)	35	30	30