ASTM A192/ ASME SA-192 Boiler Tubes description
A192 steel pipe is a seamless carbon steel boiler tube manufactured according to the American ASTM A192 standard. It is specifically designed for boiler components in high-pressure environments, possessing excellent high-temperature strength, uniform microstructure, and good process adaptability. Below is a detailed introduction:
Material: Primarily composed of carbon steel, the steel pipe maintains stable performance at high temperatures through precise control of chemical composition and heat treatment processes. Its carbon content and the ratio of other alloying elements ensure the reliability and durability of the steel pipe under high-temperature and high-pressure conditions.
Manufacturing Process: Seamless steel pipes are manufactured using processes such as hot rolling or cold drawing. Hot rolling improves production efficiency and is suitable for mass production; cold drawing further improves the dimensional accuracy and surface quality of the steel pipe, meeting the needs of applications with high precision requirements.
Chemical Composition Requirements
| Element | Content, % |
|---|---|
| C | 0.06~0.18 |
| Mn | 0.27~0.63 |
| P | ≤0.035 |
| S | ≤0.035 |
| Si | ≤0.25 |
*All values shall be based on heat analysis.
Mechanical Properties
| Mechanical Property Requirements | |
|---|---|
| T.S. min ksi [MPa] |
47 [325] |
| Y.S. min ksi [MPa] |
26 [180] |
| El. in 2" min, % |
35 |
| Brinell Hardness max. HBW |
137 |
| Rockwell Hardness, max. HRBW |
77 |
*T.S.: tensile strength; *Y.S.: yield strength; *El.: elongation.
*The Brinell Hardness number applies to ASTM A192 tubes 0.200″ [5.1 mm] and over in wall thickness.
*The Rockwell Hardness number applies to ASTM A192 tubes less than 0.200″ [5.1 mm] in wall thickness.
*Mechanical properties don't apply to tubing smaller than 1/8″ [3.2 mm] inside diameter or 0.015″ [0.4 mm] thickness.
ASTM A192 Seamless tubes Wall Thickness Tolerance
| Seamless, Cold-Finished Tubes | ||
| Outside Diameter
In. (mm) |
Wall thickness Tolerance % | |
| Over (+) | Under (-) | |
| 1 ½ (38.1) and under | 20 | 0 |
| Over 1½ (38.1) | 22 | 0 |
ASTM A192 Seamless Tube Outside Diameter Tolerance
| Cold-Finished Seamless Tubes | ||
| Outside Diameter
In. (mm) |
Permissible Variations In. (mm) | |
| Over (+) | Under (-) | |
| Under 1 (25.4) | 0.004 (0.1) | 0.004 (0.1) |
| 1 to 1 ½ (25.4 to 38.1), Incl | 0.006 (0.15) | 0.006 (0.15) |
| Over 11⁄2 to 2 [38.1 to 50.8], Excl | 0.008 (0.2) | 0.008 (0.2) |
| 2 to 21⁄2 [50.8 to 63.5], Excl | 0.010 (0.25) | 0.010 (0.25) |
| 21⁄2 to 3 [63.5 to 76.2], Excl | 0.012 (0.3) | 0.012 (0.3) |
Test and inspection
Packaging and shipping
