ASTM A556, ASME SA 556 is a common standard specification for seamless cold-drawn carbon steel tubes for the boiler system and feedwater heater. It covers minimum-wall-thickness, seamless cold-drawn carbon steel tubes including bending into the form of U-tubes. It’s used for making a water cooling wall of the power plant boiler, it can effectively eliminate the steam film on the inner wall of the steel tube and improve the thermal efficiency of the furnace wall. There are three grades for this specification: Grade A2, B2, C2, in which B2 and C2 are commonly used.

  • Specification: ASTM A556 B2
  • Outside Diameter: 20mm-31.8mm
  • Wall Thickness::1.1mm-35mm
  • Length: 3m-12m
  • Delivery Condition: NBK, Bright, U bending.

ASTM A556 B2 Pipe Chemistry Composition

Grade C Si Mn P S
B2 ≤0.27 ≥0.10 0.29-0.93 ≤0.035 ≤0.035

ASTM A556 B2 Pipe Mechanical Properties

Grade Tensile Strength MPa Yield Strength MPa Elongation Hardness HRB
B2 410 min 260 min 35 79 min

ASTM A556, ASME SA 556steel pipe is mainly for a high-temperature heater system. WLD steel supplies carbon ASTM A556 Grade B2 seamless steel tubes manufactured in cold drawn process in various sizes and specifications and equivalent material for boiler and economizer, heater, superheater and reheater system in various sizes and specifications. If you are looking for this material, please contact us or get a quotation. Not only do we have all kinds of sizes, but we also have all kinds of sizes that are hard to find.