Seamless carbon steel pipe ASTM A192 specification parameter table

Seamless carbon steel pipes under the ASTM A192 specification are widely used in high-pressure boiler systems due to their excellent mechanical properties and reliability. This standard defines the requirements for seamless carbon steel tubes that are suitable for use as boiler and superheater tubes, where they are exposed to extreme temperatures and pressures.

The ASTM A192 specification covers seamless carbon steel tubes with minimum wall thickness, designed for high-pressure applications in power generation and industrial heating systems. These tubes are commonly manufactured in both hot-rolled and cold-drawn conditions by suppliers like CSC STEEL. They are typically used in high-pressure boilers operating at pressures up to 9.8 MPa and temperatures ranging from 450°C to 650°C. Applications include heating surfaces, headers, economizers, superheaters, and reheaters.

Chemical Composition of ASTM A192 Seamless Carbon Steel Tubes

ASTM A192 Carbon Steel Chemical Composition C Mn P≤ S≤ Si≤
0.06–0.18 0.27–0.63 0.035 0.035 0.25

Mechanical Properties of ASTM A192 Seamless Carbon Steel Tubes

Yield Strength (MPa) Tensile Strength (MPa) Elongation (%) Brinell Hardness Number
(WT≥)0.200In(5.1mm)		 Rockwell Hardness Number
(WT)0.200In(5.1mm)
≥180 ≥325 ≥35 137HRB 77HRB

Outside Diameter Tolerances for ASTM A192 Seamless Pipes

Hot Rolled Outside Diameter, mm Tolerance, mm
OD ≤ 101.6 +0.4 / -0.8
101.6 < OD ≤ 177.8 +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 ≤ 177.8 +0.38 / -0.64

Wall Thickness Tolerances for ASTM A192 Seamless Pipes

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

Dimensions and Wall Thickness Availability for ASTM A192 Seamless Pipes

OD (mm) Wall Thickness (mm)
  2 2.5 3 3.5 4 4.5 5 6 6.5–7 7.5–8 8.5–9 9.5–10 11 12
Φ25–Φ28 ● ● ● ● ● ●                
Φ32   ● ● ● ● ● ●              
Φ34–Φ36   ● ● ● ● ● ●              
Φ38   ● ● ● ● ● ●              
Φ40     ● ● ● ● ●              
Φ42     ● ● ● ● ●              
Φ45     ● ● ● ● ● ●            
Φ48–Φ60     ● ● ● ● ● ● ●          
Φ63.5       ● ● ● ● ● ● ●        
Φ68–Φ73         ● ● ● ● ● ●        
Φ76         ● ● ● ● ● ● ● ● ● ●
Φ80         ● ● ● ● ● ● ● ● ● ●
Φ83         ● ● ● ● ● ● ● ● ● ●
Φ89         ● ● ● ● ● ● ● ● ● ●
Φ95         ● ● ● ● ● ● ● ● ● ●
Φ102         ● ● ● ● ● ● ● ● ● ●
Φ108         ● ● ● ● ● ● ● ● ● ●
Φ114           ● ● ● ● ● ● ● ● ●
Φ121           ● ● ● ● ● ● ● ● ●
Φ127           ● ● ● ● ● ● ● ● ●
Φ133           ● ● ● ● ● ● ● ● ●
Φ140             ● ● ● ● ● ● ● ●
Φ146             ● ● ● ● ● ● ● ●
Φ152             ● ● ● ● ● ● ● ●
Φ159             ● ● ● ● ● ● ● ●
Φ168             ● ● ● ● ● ● ● ●

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