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Parameter | Description | Unit | Example Values |
Steel Grade | Designation of the steel type | - | Q235, Q345, ASTM A36 |
Yield Strength | Stress at which the steel begins to deform plastically | MPa | 235 for Q235, 345 for Q345 |
Ultimate Tensile Strength | Maximum stress the steel can withstand before failure | MPa | 370 - 500 for Q235, 470 - 630 for Q345 |
Elastic Modulus | Measure of the steel's stiffness in the elastic range | GPa | 206 for carbon steel |
Poisson's Ratio | Ratio of lateral strain to axial strain under uniaxial stress | - | 0.3 for steel |
Density | Mass per unit volume of the steel | kg/m3 | 7850 for carbon steel |
Cross - Section Shape | Shape of the steel member cross - section | - | I - beam, H - beam, channel, angle |
Cross - Section Dimensions | Width, height, thickness, etc. of the cross - section | mm | For an I - beam: height = 300 mm, width = 150 mm, flange thickness = 10 mm, web thickness = 8 mm |
Moment of Inertia | Geometric property related to the cross - section's resistance to bending | Mm4 | Varies depending on cross - section shape and dimensions |
Section Modulus | Geometric property related to the cross - section's resistance to bending stress | mm3 | Varies depending on cross - section shape and dimensions |
Torsional Constant | Property related to the cross - section's resistance to torsion | Mm4 | Varies depending on cross - section shape and dimensions |
Weld Strength | Strength of the welded joint, related to the welding process and materials | MPa | Depends on welding method, electrode type, etc. |
Bolt Strength | Strength of bolts used for connections, specified by bolt grade | MPa | Grade 8.8 bolts have a minimum tensile strength of 800 MPa |
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