HR plate HR plate (Hot Rolled Steel Plate) is a type of hot rolled steel supplied in coil sheet or sheet plate form, widely used in construction, engineering, and fabrication industries. Produced through the hot rolling process, steel slabs are heated above their recrystallization temperature and passed through rolling mills to form rolled steel sheets with uniform thickness and high ductility. Unlike cold rolled steel, hr sheet has a rougher surface finish, which makes it suitable for heavy-duty structural applications rather than precision parts. HR Coil full form: Hot Rolled Coil hr plate HSN code: 7208 (Flat-rolled products of iron or non-alloy steel, hot-rolled, in sheets ≥3mm thickness). “Hot rolled steel” means the steel is shaped at high temperature, making it easier to form large sheets and plates but with a rougher surface. Note : HR plate prices are listed per metric tonne (1 MT = 1,000 kg). To estimate the per-kg rate, simply divide the quoted MT price by 1,000 for an easy comparison.
HR Plate (Hot Rolled Plate)
Chemical and Mechanical Properties of HR Plate
HR plate is produced in multiple steel grades, suitable for structural, fabrication, and engineering needs. Typical mild steel hr sheet properties: Chemical Composition (Mild Steel HR Plate):
- Carbon (C): 0.12–0.20%
- Manganese (Mn): 0.40–0.60%
- Phosphorus (P): ≤ 0.04%
- Sulphur (S): ≤ 0.05%
Mechanical Properties:
- Tensile Strength: 370–550 N/mm² (resistance to breaking under tension)
- Yield Strength: 250–410 N/mm² (stress at which permanent deformation begins)
- Elongation: 20–26% (measure of ductility and ability to stretch without breaking)
These values are important when comparing cold rolled steel vs hot rolled steel or evaluating hot rolled vs cold rolled steel for different industrial applications. A steel grades chart helps buyers select the correct sheet metal grades and rolled steel for their project requirements.
Applications & Industrial Uses
HR plate is used across industries due to its strength, ductility, and adaptability:
- Construction & Infrastructure: Structural beams, bridges, industrial flooring, heavy equipment bases.
- Automotive & Engineering: Chassis components, machinery frames, engine parts, fabricated metal structures.
- Shipbuilding & Marine: Hull plating, offshore platforms, structural frameworks.
- Metal Fabrication: sheet plate for tanks, containers, cabinets, and rolled steel sheet assemblies.
- General Industry: metal plate for pipelines, storage units, and industrial workshops.
The rough surface of hr sheet makes it ideal for welding, machining, or painting where heavy-duty structural performance is required.
HR Plate Forms & Sizes
HR plate is available in multiple forms:
- Coils: hr coil full form, suitable for industrial rolling or fabrication.
- Sheets / Sheet Plate: Standard plate sizes include 1000×2000mm, 1500×3000mm, 2000×6000mm; standard plate size varies by manufacturer.
- Custom Thickness: plate thickness ranges from 3mm to 100mm.
These options allow easy adaptation for rolled steel sheet, steel sheet roll, or sheet metal grades used in diverse industries. Hot Rolled Plates are produced in integrated steel plants and rolling mills located across India’s key industrial regions. These centers form the backbone of heavy fabrication, construction, shipbuilding, and infrastructure industries.
- Bhilai (Chhattisgarh): SAIL Bhilai Steel Plant is one of the largest producers of hot rolled plates in India, known for heavy-duty structural and pressure-vessel-grade plates.
- Rourkela (Odisha): SAIL Rourkela Steel Plant manufactures HR plates and sheets used in construction, bridges, and machinery fabrication.
- Raigarh & Raipur (Chhattisgarh): Major hubs for mild steel plates and HR plates supplied from re-rolling mills and integrated steel facilities using sponge iron and scrap as feedstock.
- Jamshedpur (Jharkhand): Tata Steel’s facility produces hot rolled steel plates with superior surface finish and mechanical properties, widely used in engineering and automotive sectors.
- Hazira (Gujarat): Home to JSW Steel and AM/NS India — two of the largest HR plate and coil producers, catering to western and northern India
- Visakhapatnam (Andhra Pradesh): Vizag Steel Plant produces HR plates and shipbuilding-grade steel, serving ports, shipyards, and fabrication industries.
- Mumbai, Pune & Ahmedabad: Strong distribution and warehousing centers for HR steel plate, serving industrial buyers in automotive, engineering, and infrastructure sectors.
- Delhi NCR, Faridabad & Ludhiana: Active secondary markets for cut-to-size plates and HR plate dealers, supporting fabrication and machinery manufacturing.
Hot Rolled vs Cold Rolled Steel
| Property | HR Plate / Hot Rolled Steel | Cold Rolled Steel / CR Sheet |
|---|---|---|
| Surface | Rough, scaled | Smooth, polished |
| Thickness Accuracy | ±0.5–2 mm | ±0.1 mm |
| Strength | High | Slightly higher due to cold work |
| Typical Use | Structural plates, heavy fabrication | Appliances, precision components, CR coils |
| Cost | Lower | Higher due to additional finishing |
| Production Process | Hot rolling process | Cold rolling process |
Quality Checks Before Buying HR Plate
Before purchasing HR sheet or hot rolled steel sheet, buyers should verify:
- Steel grades & certification: Confirm IS, ASTM, or ISO certifications and cross-check the applicable steel grade.
- Thickness & size: Verify plate thickness, plate dimensions, and standard sheet sizes as per your requirement.
- Mechanical properties: Ensure tensile strength, yield strength, and elongation meet project specifications.
- Surface quality: Check for scale, roughness, edge condition, or pickled finish depending on fabrication, coating, or painting needs.
- Documentation: Request an MTC (Mill Test Certificate) or quality certificate for compliance and traceability.
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