
Large Square Billet 300x300mm Q345B
The Large Square Billet 300x300mm Q345B is a high-performance low-alloy structural steel
16Mn Angle Steel 75x75mm is a premium low-alloy high-strength structural steel profile, engineered for durability and versatility in construction, industrial, and engineering projects. With its balanced chemical composition, robust dimensions, and reliable mechanical performance, this angle steel delivers exceptional strength-to-weight ratio, making it a preferred choice for structural frameworks requiring both stability and adaptability.


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Product details
| Parameter | Value/Description | Unit | Remarks |
|---|---|---|---|
| Material | 16Mn (Low-Alloy High-Strength Structural Steel) | — | Chemical Composition: C ≤0.18%, Si ≤0.55%, Mn 1.20–1.60%, P ≤0.040%, S ≤0.040% |
| Section Size | 75×75 | mm | Equal-leg angle, both legs 75mm |
| Thickness | 6/8/10 | mm | Available options |
| Weight per Meter | 6.8/8.9/11.0 | kg/m | For 6/8/10mm thickness respectively |
| Theoretical Weight Factor | 0.00785×Side×Side×Length×Weight Factor | kg | For different length calculations |
| Length | 6000 (Customizable) | mm | Standard 6m, cut to order |
| Sectional Area | 8.727 (6mm) | cm² | Example value, varies with thickness |
| Tensile Strength | ≥490 | MPa | Minimum at room temperature |
| Yield Strength | ≥315 | MPa | Minimum at room temperature |
| Elongation δ5 | ≥21 | % | Minimum at room temperature |
| Impact Toughness | ≥34 | J | Charpy impact value, room temperature |
| Manufacturing Standard | GB/T 1591-2018 | — | Or equivalent international standard |
| Surface Treatment | Black/Hot-Dip Galvanized/Painted | — | Options for corrosion resistance |
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