Hot Rolled Steel Coil Q195 Q215 St37 S235jr S355jr Ss400 Steel Coil Top Quality Carbon Steel Coil

Short Description:

Hot rolled steel coil refers to the pressing of billets into the desired thickness of steel at high temperatures. In hot rolling, steel is rolled after being heated to a plastic state, and the surface may be oxidized and rough. Hot rolled coils usually have large dimensional tolerances and low strength and hardness, and are suitable for construction structures, mechanical components in manufacturing, pipes and containers.

Inspection: SGS, TUV, BV, Factory Inspection

Grade: Carbon steel

Material: 60, 65Mn, 55Si2Mn, 60Si2MnA, 50CrVA,

Technique: Hot Rolled

Width: 600-4050mm

Tolerance: ±3%, +/-2mm Width: +/-2mm

Advantage: Accurate Dimension

Delivery Time: 3-15 days (according to the actual tonnage)

Port Information: Tianjin Port, Shanghai Port, Qingdao Port, etc.

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Product Detail

Product Tags

Product Detail

Product Name	Hotselling Best Quality A Large Amount Hot Rolled Steel Coil
Material	Q195/Q235/Q345/A36/S235JR/S355JR
Thickness	1.5mm~24mm
Size	3x1219mm 3.5x1500mm 4x1600mm 4.5x2438mm customized
Standard	ASTM A53-2007, ASTM A671-2006, ASTM A252-1998, ASTM A450-1996, ASME B36.10M-2004, ASTM A523-1996, BS 1387, BS EN10296, BS
	6323, BS 6363, BS EN10219, GB/T 3091-2001, GB/T 13793-1992, GB/T9711
Grade	A53-A369, Q195-Q345, ST35-ST52
	Grade A, Grade B, Grade C
Technique	Hot rolled
Packing	Bundle, or with all kinds of colors PVC or as your requirements
Pipe Ends	Plain end/Beveled,protected by plastic caps on both ends, cut quare,grooved,threaded and coupling,etc.
MOQ	1 Tons, more quantity price will be lower
Surface Treatment	1. Mill finished /Galvanized /stainless steel
	2. PVC,Black and color painting
	3. Transparent oil,anti-rust oil
	4. According to clients requirement
Product Application	1. Manufacturing of building structures,
	2. lifting machinery,
	3. engineering,
	4. agricultural and construction machinery,
Origin	Tianjin China
Certificates	ISO9001-2008,SGS.BV,TUV
Delivery Time	Usually within 10-15 days after receipt of advance payment

Main Application

1.Fluid / Gas delivery, Steel structure, Construction;
2.ROYAL GROUP ERW/Welded round carbon steel pipes, which with Highest quality and strong supply ability are widely used in Steel structure and Construction.

Note:
1.Free sampling, 100% after-sales quality assurance, Support any payment method;
2.All other specifications of round carbon steel pipes are available according to your requirement (OEM&ODM)! Factory price you will get from ROYAL GROUP.

Size Chart

Thickness(mm)	3	3.5	4	4.5	5	5.5	customized
Width(mm)	800	900	950	1000	1219	1000	customized

Process of production

The production process of hot-rolled steel coil is a key link in steel manufacturing. It mainly forms the steel billet into the required plate shape through high-temperature rolling. The following are its core steps:

Raw Material Preparation
Continuously cast or bloomed slabs are used as raw material, typically with a thickness of 150-300 mm.
The slab surface is cleaned (e.g., flame cleaning or mechanical grinding) to remove scale and defects to ensure rolling quality.
Heating
The slab is fed into a walking beam furnace and heated to 1100-1300°C to reach the austenitizing temperature and improve plasticity.
Heating time and temperature uniformity are controlled to avoid overheating or underheating.
Roughing
The slab is reduced to a thickness of 30-50 mm in a reversing roughing mill (e.g., a two- or four-high mill) to form an intermediate bar.
After each rolling pass, high-pressure water descaling may be performed to remove the surface oxide layer.
Finishing
The intermediate bar enters the finishing mill (usually consisting of six or seven four- or six-high mills) where it is gradually reduced to the target thickness (e.g., 1.2-25 mm) through continuous rolling. Automatic Gauge Control (AGC) and a shape control system are used to ensure dimensional accuracy and flatness.
During the rolling process, the rolls require cooling and lubrication to prevent thermal deformation and wear.
Cooling
A laminar cooling system is used to rapidly cool the steel strip from the final rolling temperature (approximately 800°C) to room temperature by controlling the water volume and cooling rate (e.g., 30-50°C/second).
The cooling process directly affects the microstructure (e.g., the ratio of ferrite to pearlite) and mechanical properties of the steel coil.
Coiling
The steel strip is coiled into a coil using pinch rolls and a coiler. The tension is controlled at 100-500 N/mm² to ensure a tight coil shape and no loose coils.
The coiling temperature is typically controlled between 550-700°C to optimize performance.
Post-Processing
Surface treatment: Pickling to remove oxide scale, or coatings such as galvanizing or aluminizing.