Seamless carbon steel boiler tubes for high
Pic-(Seamless carbon steel boiler tubes for high)
Standard of implementation： ASTM A192/ A192M/ASME SA-192/ SA-192M
Dimensional tolerance：
Application: the manufacture of boiler water cooling wall, coal heater, steam heater and steam pipe
Major grade: SA192, etc. through consultation, can also supply other special grade of steel pipe
Chemical composition and mechanical properties：
Hardness requirements：
| Standard | Steel grade | Chemical constituents (%) | Mechanical properties | Elongation (%) | ||||
| C | Mn | Si | P.S | Tensile strength( MPa ) | Yield strength( MPa ) | |||
| ASTMA192 | A192 | 0.06 ～ 0.18 | 0.27 ～ 0.63 | ≤ 0.25 | ≤ 0.035 | ≥ 325 | ≥ 180 | ≥ 35 |
Hardness requirements：
| Brinell hardness | Hardness of the Luo |
| S≥5.1mm | S＜5.1mm |
| ≤137 HB | ≤77 HRB |
Dimensional tolerance：
| Type of steel tube | Outside diameter（D） | Wall thickness（S） | ||
| Outside diameter（mm） | Deviation（mm） | Outside diameter（mm） | Deviation（mm） | |
| Hot rolling tube | ≤101.6 | +0.4～-0.8 | 76～168.3 | +28%～0 |
| ＞101.6～168.3 | +0.4～-1.2 | |||
| Cold drawn pipe | ＜25.4 | +0.10 | ≤38.1 | +20%～0 |
| 25.4～38.1 | +0.15 | |||
| ＞38.1～＜50.8 | +0.20 | ＞38.1 | +22%～0 | |
