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ASTM A192 Seamless carbon steel boiler tubes for high pressure service
Seamless Carbon Steel Boiler Tubes for High-Pressure
Service
Minimum-Wall-Thickness
ASTM A192 Seamless Cold Drawn High Pressure Boilers Carbon Steel
Heat Exchanger Tubes Applications:
for Boilers,Superheaters,
Heat-Exchangers,
High-pressure Boilers,
Steam Boilers
Cold Condensers and High-Pressure Services,
High-Temperature Services for Boiler Constructions
Size range:
O.D.:12.7-168mm
W.T.: 1.0-15mm
L: according to customer requirement max 32000mm
Manufacture Method for Carbon Steel Heat Exchanger Tubes:
Tubes are manufactured by seamless process and both hot finished and cold finished are applicable.
Carbon Steel Heat Exchanger Tubes Heat treatment:
Hot finished tubes need not be heat treated.
Cold Finished tubes are heat treated after the final cold
finishing pass at a temperature of 1200℉(650℃) or higher
Steel Grade and Chemical
Compositions:
| C | 0.06-0.18 |
| Mn | 0.27-0.63 |
| P | ≤0.035 |
| S | ≤0.035 |
| Si | ≤0.25 |
Mechanical Properties
Tensile Streghth: min ksi[Mpa] 47[325]
Yield Point:
min ksi[Mpa] 26[180]
Elongation:
≥35%
Hardness
| Brinell Hardness | Rockwell Hardness Number | |
| WT≥0.200in(5.1mm) | WT＜0.200in(5.1mm) | |
| 137HRB | 77HRB | |
| Tolerance for OD and WT(SA-450/SA-450M) | |||||
| OD in(mm) | + | - | WT in(mm) | + | - |
| ＜1''(25.4) | 0.10 | 0.10 | ≤1.1/2''(38.1) | 20% | 0 |
| 1''～1.1''(25.4～38.1) | 0.15 | 0.15 | ＞1.1/2''(38.2) | 22% | 0 |
| ＞1.1/2''～＜2''(38.1～50.8 | 0.20 | 0.20 | |||
| 2''～＜2.1/2''(50.8～63.5) | 0.25 | 0.25 | |||
| 2.1/2''～＜3''(63.5～76.2) | 0.30 | 0.30 | |||
| 3''～＜4''(76.2～101.6) | 0.38 | 0.38 | |||
| 4''～＜7.1/2''(101.6～190.5) | 0.38 | 0.64 | |||
| ＞7.1/2～9''(190.5～228.6) | 0.38 | 1.14 | |||
Mechanical Testing:
Flattening Test
Flaring Test
Flange Test
Hardness Test
Hydrostatic Test
