This table outlines the core specifications of 45# Angle Steel 120x120mm, a medium-carbon steel profile valued for its balanced strength, machinability, and cost-effectiveness. Its 120x120mm equal-leg design makes it ideal for heavy-duty structural roles requiring reliable load distribution.
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Product details
| Parameter | Value/Description | Unit | Remarks |
|---|---|---|---|
| Material | 45# (Medium-Carbon Structural Steel) | — | Chemical Composition: C 0.42–0.50%, Si 0.17–0.37%, Mn 0.50–0.80%, P ≤0.035%, S ≤0.035% |
| Section Size | 120×120 | mm | Equal-leg angle, both legs 120mm |
| Thickness Options | 10/12/14/16/18 | mm | Standard available thicknesses |
| Weight per Meter | 18.2/21.6/25.0/28.3/31.5 | kg/m | Corresponding to 10/12/14/16/18mm thickness |
| Length | 6000–12000 (Customizable) | mm | Standard 6m/9m; cut-to-order available |
| Cross-Sectional Area | 23.117 (10mm) | cm² | Example value; varies with thickness |
| Tensile Strength (As-rolled) | 600–750 | MPa | Typical range at room temperature |
| Tensile Strength (Heat-treated) | ≥630 | MPa | Minimum after quenching and tempering |
| Yield Strength (Heat-treated) | ≥355 | MPa | Minimum after quenching and tempering |
| Elongation (δ5) | ≥16 | % | Minimum at room temperature (as-rolled) |
| Hardness (As-rolled) | 197–241 | HBW | Brinell hardness range |
| Hardness (Heat-treated) | 22–28 | HRC | Achievable range via quenching + tempering |
| Impact Toughness (αk) | ≥39 | J/cm² | Minimum at room temperature (heat-treated) |
| Heat Treatment | Quenching (840°C, water cooling) + Tempering (600°C, air cooling) | — | Optional process to enhance strength/toughness |
| Manufacturing Standard | GB/T 699-2015 | — | Compliant with Chinese standard for high-quality carbon structural steels |
| Surface Treatment | Mill finish (black) / Paint coating / Zinc plating | — | Custom finishes available for corrosion protection |
| Typical Applications | Machinery frames, structural bracing, gear blanks, connecting rods, heavy-duty brackets | — | Suitable for medium-load structural and mechanical components |
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