Technical Specifications
| Category | Parameter | Details |
| Material Standard | GB/T | Q235, Q345, 20#, 45#, etc. |
| ASTM Equivalent | ASTM A36, A53, A106 | Common grades for international trade |
| Chemical Composition | Carbon (C) | 0.06% - 1.5% (varies by grade) |
| Manganese (Mn) | 0.25% - 1.65% | |
| Phosphorus (P) | ≤ 0.040% (max) | |
| Sulfur (S) | ≤ 0.050% (max) | |
| Silicon (Si) | 0.10% - 0.35% | |
| Mechanical Properties | Tensile Strength (Rm) | 370 - 860 MPa |
| Yield Strength (Re) | 235 - 690 MPa | |
| Elongation (A) | 10% - 25% | |
| Hardness (Brinell HBW) | 120 - 280 | |
| Physical Properties | Density | 7.85 g/cm³ |
| Melting Point | ~1370 - 1510°C | |
| Surface Treatment | Options | Hot-rolled, Cold-rolled, Galvanized, Black (uncoated), Pickled and Oiled |
| Dimensions | Plate/Sheet Thickness | 0.5 mm - 300 mm |
| Round Bar Diameter | 5 mm - 500 mm | |
| Pipe/Tube Size | 1/8" - 24" (ASTM standards) | |
| Processing Technology | Forming Methods | Forging, Casting, Machining, Welding |
| Applications | Typical Uses | Structural parts, automotive components, machinery, pipelines, tools |
| Certifications | Compliance | ISO 9001:2015, CE, Mill Test Certificate (MTC) |
| Packaging | Standard | Seaworthy wooden crates, bundles, or as per customer request |
1.What are hot rolled steel round bars used for?
Construction: Hot rolled steel round bars are used for structural support in buildings, bridges, and infrastructure projects. Engineering: These bars are essential for the manufacturing of machinery components and mechanical parts.
2.What is the difference between hot rolled and forged steel?
Unlike hot rolling, which relies on heat and pressure from rollers to shape the metal, forging uses hammers or presses to deform the metal into its desired shape. This process creates a stronger bond between atoms within the metal as well as adds strength to individual molecules.
3.Which is better, forged steel or carbon steel?
| Particulars | Forged Steel | Carbon Steel |
|---|---|---|
| Longevity | More prone to wear and tear | Less prone to damage |
| Industry application | Construction and heavy machinery | All engineering projects, tools, automotive components, construction |
4. What are the three types of hot rolled steel?
Hot-rolled steel types
Low-carbon or mild steel with 0.3 % or less carbon by volume.
Medium-carbon steel with between 0.3% and 0.6% carbon by volume.
High-carbon steel with more than 0.6% carbon by volume.
5.What are the disadvantages of hot rolled steel?
Drawbacks of Hot Rolled Steel:
Surface finish: Hot rolled steel often has a rough, uneven surface. This scaly finish can be removed by pickling, grinding or sand-blasting.
Inconsistent dimensions: Due to the rapid cooling process, hot rolled steel can shrink non-uniformly and have slightly less precise dimensions