Seamless Carbon Boiler Tube ASTM A 210 specification

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Seamless Carbon Boiler Tube ASTM A 210 specification

The ASTM A 210 standard covers seamless steel boiler and superheater tubes, which are medium carbon steel products. These tubes are commonly used in a variety of pressure applications such as high, medium, and low-pressure boilers. The product range includes safe end tubes, minimum wall thickness arch tubes, support tubes, and various tube sizes. The manufacturing process follows a seamless method, and the final product can be either hot-rolled or cold-drawn. Customization is available based on specific customer requirements.

Testing procedures include tensile testing, flattening test, expansion test, hardness test, hydraulic test, and non-destructive electrical testing. The delivery condition typically includes annealed, normalized, or normalized and tempered states. Surface treatments may consist of oil immersion, varnish coating, passivation, phosphating, or shot blasting to ensure durability and corrosion resistance.

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

Outer Diameter and Tolerance:

Hot Rolled Outer Diameter, mm Tolerance, mm
OD ≤ 101.6 +0.4 / -0.8
101.6 < OD ≤ 127 +0.4 / -1.2
   
Cold Drawn Outer 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 Outer 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 Outer Diameter, mm Tolerance, %
OD ≤ 38.1 +20 / -0
OD > 38.1 +22 / -0

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