Hot Rolled Steel Plate

Hot rolled steel plate, also known as hr steel plate, are essential materials in various industries. Hot rolled steel plate is produced by heating steel slabs to high temperatures and passing them through rollers to achieve the desired thickness. This process results in a product with consistent properties throughout its cross-section. Hot rolled steel examples include structural shapes, bars, plates, and sheets used in construction, automotive, and industrial applications. Hot-Rolled Steel Sheets and Coils meeting a variety of standards ranging from mild steels to high-tensile strength steels are available. Variable sizes of cut sheets, coils, and various surface finishes such as black finish, pickled finish and shot-blasted finish can be selected in accordance with your needs.

Tight Dimensional Tolerances

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Flexible Order Sizes

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HOT ROLLED STEEL PLATE 37
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types of hot rolled steel plate

Various forms of hot rolled steel are available in the market, including hot rolled steel sheet in coil and prime hot rolled steel sheet in coil. Hot rolled steel bars, plates, and structural shapes form the backbone of many construction and manufacturing processes. Specialized products include hot rolled steel chequered plate for slip-resistant flooring, hot rolled boiler steel plate for pressure vessels, and hot rolled steel sheet pile for earth retention structures, etc. Hot rolled steel floor plate and cold rolled steel sheet fireplace are examples of specific applications.

CARBON-STEEL-PLATE

Hot Rolled Carbon Steel Plate

The Most Common Type, Suitable For General Purposes.
HOT-ROLLED-CHEQUERED-STEEL-PLATE

Hot Rolled Chequered Steel Plate Or Hot Rolled Tread Plate

Features A Raised Pattern For Improved Traction.
25CRMOS4 MACHINABLE CHROMIUM MOLYBDENUM STEEL

Hot Rolled Alloy Steel Plate

Contains Additional Elements For Enhanced Properties.
STAINLESS-STEEL-PLATE

Hot Rolled Stainless Steel Sheet And Plate

Offers Corrosion Resistance And Durability.
HOT-ROLLED-STEEL-PLATE

Hot Rolled Mild Steel Sheet And Plate

Known For Its Malleability And Weldability.
BOILER-STEEL-PLATE

Boiler Steel Plates

Designed To Withstand High Temperatures And Pressures In Boilers And Similar Equipment.
HIGH STRENGTH LOW ALLOY (HSLA) STEEL PLATES

Hot Rolled High Strength Low Alloy (HSLA) Steel Plates

These Have Higher Strength-To-Weight Ratios Than Standard Carbon Steels, Achieved Through Careful Addition Of Alloying Elements And Specific Processing Techniques.
WEATHERING-STEEL-PLATES

Weathering Steel Plates

Also Known As Cor-Ten Steel, These Form A Stable Rust-Like Appearance When Exposed To Weather, Eliminating The Need For Painting In Some Applications.
ABRASION-RESISTANT STEEL PLATES (2)

Abrasion-Resistant Steel Plates

These Are Designed To Withstand Wear And Tear, Often Used In Mining And Construction Equipment.
BOILER STEEL PLATE

Pressure Vessel Steel Plates

Specifically Engineered For Use In Pressure Vessels, These Plates Offer High Strength And Toughness At Various Temperatures.
SHIPBUILDING STEEL PLATE

Shipbuilding Steel Plates

These Plates Meet Specific Maritime Industry Standards For Strength, Toughness, And Corrosion Resistance.
CARBON STEEL

Structural Steel Plates

Used In Construction And Infrastructure Projects, These Plates Offer High Strength And Good Weldability For Load-Bearing Applications.

hR steel plate parameters

Hot rolled steel plates are available in various grades and specifications. Common standards include ASTM A36 hot rolled steel plate and ASTM hot rolled steel plate A1011 for sheet and strip products. Hot rolled alloy steel plate, containing additional alloying elements, is used for applications requiring enhanced properties. The hot rolled steel plates grade selection depends on factors such as required strength, formability, and weldability.

Nominal thicknessYield strength(Mpa)Tensile strength(Mpa)Elongation A50mm%180 degree bending test
>1.5-2.5≤290≥310≥38D=0a
>2.5-3.0≤290≥300≥38D=0a
>3.0-4.0≤290≥300≥40D=1/2a
Note:
1. Listed in the table Stretching test,Bending test Suitable for longitudinal specimens
2. The tensile test uses a specimen with L0=50 mm and b=25 mm.
3. The sampling plan for the bending test should be carried out in accordance with the No. 3 specimen of JIS Z 2204, and the test method should be carried out in accordance with JIS Z 2248.
4. Hardness test is carried out in accordance with the provisions of JIS Z 2245
5. Hardness HRBTarget valueThe actual value is 60±8.InactionAcceptance requirements.
Thickness,mm  (gauge)Width(mm)Length  (mm)
2(14)930,1000,1030,1100,1130,1250,13102500 
2.50(12)930,1000,1030,1100,1130,1250,1310,14002500 
2.9 1000,1100,1250,14002500,4000,4500
3.15(10)1000,1100,1250,14002500,4000,4500
3.55(9)1000,1100,1250,14002500,4000,4500
4(8)1000,1100,1250,14002500,4000,4500
Thickness and width tolerances are as per standard. Customization available. Closer tolerances can also be supplied on demand.

Gnee Steel can provide the following processing services for shipbuilding steel:

  • High-definition Plasma Cutting
  • Oxy Profiling
  • Flame Cutting
  • Punching
  • Drilling
  • Tapping
  • Bevelling
  • Counter Sinking
  • Counter Boring

hot rolled plate vs cold rolled plate

  • Production Process
  • Hot rolled steel plate is produced by heating steel above its recrystallization temperature (typically over 1700°F) and then rolling it to the desired thickness.
  • Cold rolled steel is initially hot rolled and then further processed at room temperature through additional rolling or drawing operations.
  • Surface Finish:
  • Hot rolled steel plate has a rougher surface with a bluish-gray mill scale.
  • Cold rolled steel has a smoother, more polished surface finish.
  • Dimensional Accuracy:
  • Hot rolled steel plate has wider tolerances for thickness and flatness.
  • Cold rolled steel offers tighter tolerances and more precise dimensions
  • Strength:
  • Hot rolled steel generally has lower yield and tensile strength due to its larger grain structure.
  • Cold rolled steel typically has higher strength due to work hardening during the cold rolling process.
  • Formability:
  • Hot rolled steel is often more formable and ductile.
  • Cold rolled steel can be less formable due to its increased hardness, though this can vary depending on the specific grade.
  • Internal Stresses:
  • Hot rolled steel has fewer internal stresses.
  • Cold rolled steel may have residual internal stresses from the cold working process.

Hot Rolled Steel Plate production process

HOT ROLLED STEEL PLATE PRODUCTION PROCESS
Step 1

Raw Material Preparation

  • The process begins with the selection of appropriate steel slabs.
  • These slabs are typically 6-10 inches thick, 20-80 inches wide, and up to 40 feet long.
Step2

Furnace Heating

  • The steel slabs are loaded into a reheating furnace.
  • They’re heated to temperatures above 2200°F (1200°C), which is above the steel’s recrystallization temperature.
  • This heating makes the steel malleable and easier to shape.
Step 3

Descaling

  • As the slab exits the furnace, it passes through a high-pressure water spray system.
  • This removes the initial layer of oxide scale that forms during heating.
Step 4

Roughing Mill

  • The heated slab enters the roughing mill, which consists of a series of rollers.
  • These rollers apply pressure to reduce the slab’s thickness and increase its length.
  • The slab may pass through the roughing mill multiple times.
Step 5

Finishing Mill

  • The steel then moves to the finishing mill for further thickness reduction.
  • This mill has a series of rollers that gradually reduce the steel to its final thickness.
  • The number of passes through the finishing mill depends on the desired final thickness.
Step6

Cooling

  • After rolling, the steel plate moves to a cooling bed.
  • Controlled cooling is crucial to achieve the desired mechanical properties.
  • Water sprays may be used for accelerated cooling if needed.
Step7

Leveling

  • The cooled plates pass through a leveler to ensure flatness.
  • This process helps meet the hot rolled steel plate flatness tolerance requirements.
Step 8

Cutting

  • The long steel plate is cut to the required lengths using shears or saws.
  • This stage determines the final hot rolled steel plate sizes.
Step 9

Surface Inspection

  • The plates are inspected for surface quality and potential hot rolled steel plate defects.
  • Any plates not meeting quality standards are set aside for rework or downgrading.
Step 10

Heat Treatment (Optional)

  • Some grades may undergo additional heat treatment to achieve specific mechanical properties.
  • This could include normalizing, quenching, or tempering.
Step 11

Surface Treatment (Optional)

  • Depending on the application, plates may undergo surface treatments like shot blasting or pickling.
  • Hot rolled steel plate pickled versions have improved surface quality.
Step 12

Testing

  • Samples are taken for mechanical testing and chemical analysis.
  • Tests may include tensile strength, yield strength, and impact resistance.

The final stages of hot rolled steel plate production involve marking and packaging, where plates are labeled with crucial information such as grade, heat number, and dimensions before being stacked and prepared for shipping. Throughout the entire manufacturing process, rigorous quality control measures are implemented to ensure compliance with industry standards, including careful monitoring of hot rolled steel plate thickness tolerance and other critical specifications.

Hot rolling process enables the production of a diverse range of products, spanning from thin hot rolled steel sheets to thick plates. The specific parameters at each stage of production are fine-tuned based on the desired grade being manufactured, accommodating everything from standard A36 hot rolled steel plate to more specialized varieties like hot rolled alloy steel plate. This flexibility and attention to detail ensure that the final products meet the exact requirements of various industrial applications.

What is the advantage of hot rolled steel?

Feature: lower production costs and more competitive prices.

Detail: In large construction projects, such as the skeleton structures of commercial buildings and sports venues, the use of hot-rolled steel plates can significantly reduce material costs.

Feature: Good balance of strength and toughness

Detail: In bridge construction, hot-rolled steel plates are able to withstand large dynamic loads while being tough enough to prevent sudden fracture.

Feature: Easy to cut, weld and form

Detail: In the automotive manufacturing industry, hot-rolled steel plates are widely used in body frames and can be easily formed into complex shapes.

Feature: Can produce a variety of sizes, from thin plates to thick plates.

Detail: The shipbuilding industry uses hot-rolled steel plates of different thicknesses to manufacture hulls and decks to meet the strength requirements of different parts.

Feature: The surface is slightly rough with oxide scale formed during rolling.

Detail: In the manufacture of agricultural machinery such as tractors and harvesters, this surface property aids coating adhesion and improves corrosion resistance.

Feature: The high temperatures during hot rolling help release internal stress.

Detail: In the manufacture of large pressure vessels, such as storage tanks in the petrochemical industry, smaller internal stresses reduce the risk of deformation and cracking.

Feature: Consistent mechanical properties across the entire section.

Detail: In the manufacture of wind turbine towers, uniform performance ensures the overall stability and reliability of the structure.

Feature: High production efficiency, suitable for mass manufacturing.

Detail: In railway track production, hot-rolled steel can meet large-scale and continuous production needs.

Feature: Easy to make welding connections

Detail: In the manufacturing of large mechanical equipment such as excavators, good weldability ensures the overall strength of the structure.

Feature: Cost-effective, suitable for projects requiring large amounts of steel.

Detail: In the construction of warehousing facilities, such as racking systems in large logistics centers, hot-rolled steel plates provide an affordable solution.

Feature: Additional processing can be performed to improve performance.

Detail: In outdoor billboard structures, hot-rolled steel plates have better weather resistance after galvanizing.continuous production needs.

Feature: Can be used in a variety of environments and conditions.

Detail: From Arctic oil rigs to desert solar power stations, hot-rolled steel plates can withstand the demands of extreme environments.continuous production needs.

Why Choose Gnee Steel?

If you want to find a trustable steel products manufacturer, Gnee will be your best choice. 15 years of experience steel products manufacturer, certified by the classification society, CE, ISO, and SGS. And we guarantee the highest safety and quality standards. We fulfill all requirements of reputed classification societies.
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In addition, our steel has been successfully exported to more than 60 countries such as Germany, South Korea, the United States, Mexico, and Argentina. Many regular customers come to visit our company and factory and make multiple orders.

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What Services Does Gnee Provide?

MEASUREMENT AND QUALITY TESTING2
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  • Dimensional Inspection: Length, width, diameter; Thickness, straightness; Flatness, profile;
  • Surface Inspection: Visual inspection; Roughness testing; Coating thickness measurement;
  • Composition Testing: Interstitial elemental analysis – C,S,P, Si; Alloy grading verification; Inclusion rating;
  • Mechanical Testing: Tensile strength, yield strength; Toughness, ductility; Hardness testing;
  • Flaw Detection: Ultrasonic, radiographic testing; Magnetic particle, dye penetrant testing;
  • Documentation: Inspection reports; Test certificates; Material traceability
MACHINING-AND-FINISHING1
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  • CNC machining – turning, milling, drilling
  • Surface treatments like polishing
  • Heat treatments – quenching, annealing
  • Wet/powder coating
CUTTING-SERVICE3
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  • Waterjet cutting
  • Laser cutting
  • Plasma cutting
  • Shearing/punching
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  • Rolling
  • Press braking
  • Plate bending – concave & convex
  • Profile bending -custom fabrication as per drawings
TESTING-AND-INSPECTION3
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  • Chemical analysis
  • Mechanical testing
  • Non-destructive examination
  • Ultrasonic, radiography testing

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