Description
Technical Parameters
ASTM 180 x 180 x 20 Angle Steel
Under the ASTM standard system, steel is usually classified into different grades based on its chemical composition and mechanical properties. Common grades of equal-leg angle steel with dimensions of 180 x 180 x 20 mm include A36, A572 Gr. 50 and A514, etc.
Overview of Common Grades
| Grade | Full Name | Application Scope |
|---|---|---|
| ASTM A36 | Carbon Structural Steel | General construction and engineering structures |
| ASTM A572 Gr. 50 | High-Strength Low-Alloy Structural Steel | High-strength buildings and bridge structures |
| ASTM A514 | Quenched and Tempered Alloy Steel | Ultra-high strength machinery and heavy engineering |
Chemical Composition Comparison
| Element/Grade | ASTM A36 | ASTM A572 Gr. 50 | ASTM A514 |
|---|---|---|---|
| Carbon (C) | ≤ 0.26 | ≤ 0.23 | ≤ 0.20 |
| Manganese (Mn) | 1.00 - 1.35 | 1.00 - 1.35 | 0.70 - 1.00 |
| Silicon (Si) | ≤ 0.40 | ≤ 0.40 | ≤ 0.30 |
| Phosphorus (P) | ≤ 0.040 | ≤ 0.030 | ≤ 0.020 |
| Sulfur (S) | ≤ 0.050 | ≤ 0.040 | ≤ 0.020 |
| Copper (Cu) | - | ≤ 0.40 | ≥ 0.20 |
| Chromium (Cr) | - | - | 0.80 - 1.20 |
| Molybdenum (Mo) | - | - | 0.15 - 0.30 |
Mechanical Properties Comparison
| Property | ASTM A36 | ASTM A572 Gr. 50 | ASTM A514 |
|---|---|---|---|
| Yield Strength (MPa) | ≥ 250 | ≥ 345 | ≥ 690 |
| Tensile Strength (MPa) | 400 - 550 | 450 - 600 | ≥ 760 |
| Elongation (%) | ≥ 20 | ≥ 18 | ≥ 16 |
| Impact Toughness (J/cm²) | No specific requirement | ≥ 27 @ +60°F | ≥ 47 @ -60°F |
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