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A 556 / A 556m Grade A2 Seamless Boiler Tubes Carbon Steel
Product Details
Company Details
Product Specification
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 ,% 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
Company Details
Bronze Gleitlager
,
Bronze Sleeve Bushings
and
Graphite Plugged Bushings
from Quality China Factory
Business Type:
Manufacturer,Distributor/Wholesaler,Importer,Exporter,Trading Company,Seller
Total Annual:
25000000-30000000
Employee Number:
100~200
Ecer Certification:
Verified Supplier
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TORICH INTERNATIONAL LIMITED Suite 1004, Hongan Plaza, #258 Die Yuan Road, Yinzhou District, Ningbo City, China https://www.precision-steeltube.com/
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