ASTM A192 Standard Specification for Seamless Carbon Steel Boiler Tubes for High-Pressure Service
ASTM A192 is a standard specification that covers minimum-wall-thickness, seamless carbon steel boiler and superheater tubes designed for high-pressure service. These tubes are widely used in the construction of high-pressure boilers, superheaters, and heat exchangers in power plants and similar industrial settings.
Key Features:
Material: Carbon Steel
Manufacturing Process: Seamless (SMLS) – providing uniform strength and better pressure containment.
Primary Use: High-pressure, high-temperature service in boilers.
Key Property: Excellent weldability and cold bending properties.
Basic Chemical Composition Requirements (ladle analysis):
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.06 - 0.18 |
| Manganese (Mn) | 0.27 - 0.63 |
| Phosphorus (P), max | 0.035 |
| Sulfur (S), max | 0.035 |
| Silicon (Si) | ≥ 0.25 |
Basic Mechanical Properties:
| Property | Requirement |
|---|---|
| Tensile Strength | ≥ 325 MPa (47,000 psi) |
| Yield Strength | ≥ 180 MPa (26,000 psi) |
| Elongation (in 50mm) | See standard for minimums based on wall thickness |
Common Specifications:
Size Range: Tubes are typically specified by Outside Diameter (OD) and Minimum Wall Thickness (MWT).
Delivery Condition: Usually supplied in the as-fabricated (hot-finished) condition, with possible subsequent heat treatment.
