HAO tube material Q195
May 23, 2025
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Q195 Carbon Steel:
HAO tubes are made from Q195 carbon steel.
With a yield strength ≥195 MPa and elongation ≥33%, Q195 resists deformation under stress while enabling seamless bending and shaping during production. HAO enhances performance through cold-rolled or galvanized finishes, preventing corrosion in indoor and outdoor settings. Compliant with GB/T 700 and ASTM standards, these tubes meet rigorous safety and quality benchmarks, making them ideal for residential, commercial, and industrial furniture. Their lightweight yet robust design also supports eco-friendly manufacturing through recyclability.
Black/White Tube D25mm Round Tube 15x30mm Oval Tube
Q195 Steel Mill Test
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Category
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Parameter | Value/Details | Standards/Certifications | Notes |
| Chemical Composition | Carbon (C) | ≤0.12% | GB/T 700-2006 | Low-carbon structural steel |
| Silicon (Si) | ≤0.30% | ASTM A283 Grade B/C (USA) | ||
| Manganese (Mn) | ≤0.50% | DIN S185/St33 (Germany) | ||
| Phosphorus (P) | ≤0.035% | JIS SS330/SPHC (Japan) | ||
| Sulfur (S) | ≤0.040% | ISO HR2 (σs195) | ||
| Deoxidation Method | Rimmed or Killed | |||
| Mechanical Properties | Yield Strength (σs) | ≥195 MPa (≤16mm thickness) | GB/T 700-2006 | Tested per standard specifications |
| Tensile Strength (σb) | 315–430 MPa | |||
| Elongation | ≥33% (≤40mm diameter) | |||
| Hardness (HRB) | 55–75 | Rockwell B scale | ||
| Bending Test | 180° cold bend (0/0.5a diameter) | Pass criteria for ductility | ||
| Testing Methods | Chemical Analysis | Spectrometry | SGS, TUV certifications | Verifies elemental composition |
| Tensile Testing | Measures σs, σb, elongation | EN 10204 3.1B | Hydraulic systems used | |
| Bending Test | Cold bending evaluation | |||
| Non-Destructive Testing | Ultrasonic (UT)/Eddy Current (ET) | Checks for defects | ||
| Hydrostatic Testing | Pressure resistance test | For pipes/containers | ||
| Certifications | Chinese Standard | GB/T 700-2006 | Supplier: JM Steel, Jiuzhou Metal |
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| International Equivalents | ASTM A283, DIN S185, JIS SS330 | Aligns with global benchmarks | ||
| Applications | Wire Rods | Cold-drawn products, galvanized goods | Used in binding wires, mesh | |
| Structural Components | Roofing panels, automotive frames | |||
| Sheet Metal | Cold/hot-rolled sheets | Furniture Tube, decorative panels | ||
| Key Considerations | Traceability | Heat numbers, batch IDs | Supplier: Wide Steel, Eastking Metal |
Critical for compliance |
| Third-Party Certifications | SGS, TUV | Required for international shipments | ||
| Project-Specific Standards | ASTM, DIN, etc. | Confirm alignment with requirements |
