ASTM A210 Specification for Seamless Carbon Boiler Tubes

The ASTM A210 standard specifies seamless carbon steel boiler and superheater tubes, which are medium carbon tube products. These tubes are commonly used in high, medium, and low-pressure boiler systems, as well as other pressure applications. The product range includes safe-end tubes, minimum wall thickness arch tubes, support tubes, and various sizes. The manufacturing process follows a seamless method, with the final product being either hot-rolled or cold-drawn. Surface conditions can be customized based on customer requirements.

Common delivery conditions include annealed, normalized, and normalized and tempered. Surface treatments may involve oil immersion, varnish coating, passivation, phosphating, or shot blasting. The material is designed to meet strict mechanical and chemical performance standards, ensuring durability and reliability in demanding environments.

Chemical Composition:

Grade C (Max) Mn (Max) Si (Min) P (Max) S (Max)
A1 0.27 0.93 0.10 0.035 0.035
C 0.35 0.29–1.06 0.10 0.035 0.035

Mechanical Properties:

Grade Tensile Strength (MPa) Yield Strength (MPa) Elongation (%)
A1 ≥ 415 ≥ 255 ≥ 30
C ≥ 485 ≥ 275 ≥ 30

Outside Diameter and Tolerance:

Hot Rolled Outside Diameter, mm Tolerance, mm
OD ≤ 101.6 +0.4 / -0.8
101.6 < OD ≤ 127 +0.4 / -1.2
   
Cold Drawn Outside Diameter, mm Tolerance, mm
OD < 25.4 ±0.10
25.4 ≤ OD ≤ 38.1 ±0.15
38.1 < OD < 50.8 ±0.20
50.8 ≤ OD < 63.5 ±0.25
63.5 ≤ OD < 76.2 ±0.30
76.2 ≤ OD ≤ 101.6 ±0.38
101.6 < OD ≤ 127 +0.38 / -0.64
   

Wall Thickness and Tolerance:

Hot Rolled Outside Diameter, mm Tolerance, %
OD ≤ 101.6, WT ≤ 2.4 +40 / -0
OD ≤ 101.6, 2.4 < WT ≤ 3.8 +35 / -0
OD ≤ 101.6, 3.8 < WT ≤ 4.6 +33 / -0
OD ≤ 101.6, WT > 4.6 +28 / -0
OD > 101.6, 2.4 < WT ≤ 3.8 +35 / -0
OD > 101.6, 3.8 < WT ≤ 4.6 +33 / -0
OD > 101.6, WT > 4.6 +28 / -0
Cold Drawn Outside Diameter, mm Tolerance, %
OD ≤ 38.1 +20 / -0
OD > 38.1 +22 / -0

Socks

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