What is ASTM A500 Grade A specification?
A500 GRA standard square tubing is typically made of carbon structural steel and formed through cold bending or hot rolling processes. Cold-bent square tubing has a smooth surface and high dimensional accuracy, making it suitable for applications requiring high aesthetic standards; hot-rolled square tubing, on the other hand, has higher strength and toughness and is often used in load-bearing structures.
Size restrictions: The tubing must be 88 inches (2235 mm) or less in circumference and 0.875 inches (22 mm) or less in wall thickness.
A500 Gr A Carbon Steel Hollow Structural Sections Physical Properties
| Physical Properties | Values |
|---|---|
| Density | 7.85 g/cc or 0.284 lb/in³ |
| Melting Point | 2,750°F (1,510°C) |
| Rockwell Hardness | 75-90 |
| Brinell Hardness | 137-185 |
| Shear Modulus | 80.0 GPa (11,600 ksi) |
Mechanical Properties of ASTM A500 Gr A Rectangular Pipe
| Round Structural Tubing | |
|---|---|
| Elongation Min % A | 25B |
| Tensile Strength Min, psi (Mpa) | 45000 MPa (310 psi) |
| Yield Strength Min, psi (Mpa) | 33000 psi (228 Mpa) |
| Shaped Structural Tubing | |
|---|---|
| Elongation Min % A | 25B |
| Tensile Strength Min, psi (Mpa) | 45000 MPa (310 psi) |
| Yield Strength Min, psi (Mpa) | 39000 psi (269 Mpa) |
ASTM A500 Grade A Pipe Chemical Composition
| ASTM A500 Grade A Pipe Chemical Composition | |||
|---|---|---|---|
| Elements | Heat Analysis | Product Analysis | HeatAnalysis |
| Carbon (C) | 0.26% | 0.30% | 0.23% |
| Coppur (Cu) | 0.20% | 0.18% | 0.20% |
| Sulfur (S) | 0.035% | 0.045% | 0.035% |
| Phosphorus (P) | 0.035% | 0.045% | 0.035% |
| Manganese (Mn) | - | - | 1.35% |
Manufacturing process: The manufacturing process for both A500 GrA welded and seamless pipes has been standardized, including requirements for welding methods, welding quality control, and seamless pipe forming processes, in order to ensure the quality and performance of the pipes.
Inspection and Testing: This section specifies various inspection and testing methods for the pipes, such as visual inspection, dimensional measurement, mechanical property testing, and chemical composition analysis. It also includes sampling methods and inspection frequency to ensure that each batch of pipes meets the standard requirements.
Marking and Packaging: This section requires that the pipes be clearly marked with information such as production date, steel grade, specifications, and batch number to facilitate traceability and management. The packaging should protect the pipes from damage and corrosion during transportation and storage.
A500 GrA square tube factory
