A500 is a type of carbon structural steel in the American ASTM standard, primarily used for manufacturing cold-formed welded structural components. It is characterized by moderate strength, good weldability, as well as relatively good plasticity and toughness. Depending on different grades (such as Gr.A, Gr.B, Gr.C, etc.), its yield strength and tensile strength will vary.
What is the equivalent of ASTM A500 grade?
ASTM A500 Grade A: It usually corresponds to the Chinese grades Q235B or Q235C and is suitable for general structural applications.
ASTM A500 Grade B: It typically corresponds to the Chinese grade Q345B. With high yield strength, it is widely used in load-bearing structures.
ASTM A500 Grade C: It generally corresponds to the Chinese grades Q235 or Q345B, depending on the mechanical property requirements, and is commonly seen in high-strength applications.
ASTM A500 Grade D: It usually corresponds to the Chinese grades Q345B or Q345C and is applicable to scenarios with high requirements for low-temperature toughness.
Is A500 the same as A36?
A36 and A500 steel have different properties
| Property Type | Specific Indicator | ASTM A500 | ASTM A36 |
|---|---|---|---|
| Chemical Properties | Maximum Carbon (C) Content | Typically below 0.26% (may vary by specific grade) | 0.26% |
| Manganese (Mn) Content Range | Usually 0.90% - 1.90% (may vary by specific grade, e.g., Grade A, B, C) | 1.03% (maximum, but typically in the range of 0.20% - 0.50% or 0.80 - 1.20%, depending on the standard version and supplementary requirements) | |
| Maximum Phosphorus (P) Content | 0.035% (may vary by specific grade) | 0.04% | |
| Maximum Sulfur (S) Content | 0.035% (may vary by specific grade) | 0.05% | |
| Mechanical Properties | Yield Strength (MPa) | Grade A: ≥228 MPa Grade B: ≥290 MPa Grade C: ≥317 MPa (cold-formed) or 345 MPa (hot-formed) |
≥250 MPa |
| Tensile Strength (MPa) | Grade A: 310 MPa Grade B: Minimum 400 MPa to maximum 580 MPa (but higher values are common) Grade C: Minimum 450 MPa to maximum 620 MPa (but higher values are common) |
400 - 550 MPa | |
| Elongation (%) | Typically high, depending on pipe size and grade, e.g., Grade B and C with a gauge length of 50mm, elongation ≥23% (specific values vary by grade and size) | ≥20% (for a gauge length of 200mm, for plates with a thickness ≤200mm) | |
| Impact Toughness | Usually meets impact test requirements at specific temperatures, e.g., Grade B and C may need to meet impact toughness standards at -29°C | Good impact toughness at room temperature, but specific values may vary depending on product thickness and test conditions, with no specific low-temperature requirements |
Chemical Requirements of A500
|
Element |
Grades A, B and D |
Grace C |
||
|
Heat |
Product |
Heat |
Product |
|
|
Analysis |
Analysis |
Analysis |
Analysis |
|
|
Carbon, max |
0.26 |
0.3 |
0.23 |
0.27 |
|
Manganese, max |
... |
... |
1.35 |
1.4 |
|
Phosphorus, max |
0.035 |
0.045 |
0.035 |
0.045 |
|
Sulfur, max |
0.035 |
0.045 |
0.035 |
0.045 |
|
Copper, when copper steel |
0.2 |
0.18 |
0.2 |
0.18 |
|
is specified, min |
||||
Square & Rectangle Tubing Mechanical Properties
|
Grade |
Yield (min) |
Tensile (min) |
Elongation (min) |
|
Grade A |
39,000 psi |
45,000 psi |
Determined by wall |
|
Grade B |
46,000 psi |
58,000 psi |
Determined by wall |
|
Grade C |
50,000 psi |
62,000 psi |
Determined by wall |
Round Tubing Mechanical Properties
|
Grade |
Yield(min) |
Tensile (min) |
Elongation (min) |
|
Grade A |
33,000 psi |
45,000 psi |
Determined by wall |
|
Grade B |
42,000 psi |
58,000 psi |
Determined by wall |
|
Grade C |
46,000 psi |
62,000 psi |
Determined by wall |
A500 Structural Tube Applications:
- Building Structures
In high-rise buildings or large-span structures, the wall thickness and strength of square pipes need to be customized based on load calculations. For instance, certain truss joints may require increased wall thickness or the use of higher-grade Gr.C material.
- Mechanical Equipment
In conveyor frames or automated equipment, the dimensional accuracy and straightness of square pipes are critical. Excessive deviations may lead to assembly difficulties or unstable operation.
- Energy Sector
Square pipes used for solar panel mounts or wind turbine towers typically require higher weather resistance and fatigue resistance. Therefore, they may be manufactured using special alloy compositions or heat treatment processes.
A500 cold rolled steel Tube factory
