EASTKING STEEL



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Q345B/A/C/D/E Hot Rolled Carbon Steel Coil Structure Steel Coil

Equivalent materials: ASTM A572 Gr 50, EN 10025-2 S355JR, DIN 17100 St52-3, AS/NZS 3678 Grade 350

Material Q345B/A/C/D/E
Standard AISI ASTM JIS BS DIN GB
Technique Hot Rolled
Type Steel Coil
Thickness 2-100mm
Width 600-2000mm or as customer’s requirements
Sample Sample Freely
Packaging Standard seaworthy packaging or as required
Payment T/T ; L/C ;

Product Introduction

Q345 steel is a Chinese standardized low alloy, medium tensile strength steel made with a hot-rolling process, and it is known for its excellent mechanical properties and weldability. It is widely used in various structural applications, such as building and bridge construction, where higher strength and good toughness are required.

Q345 Steel has the following general characteristics:

  • Diverse grades: Q345 steel is available in several grades, including Q345A, Q345B, Q345C, Q345D, and Q345E, with each grade offering different mechanical properties and suitability for specific applications.
  • Higher strength: Q345 steel has higher yield strength and tensile strength compared to Q235 steel, making it suitable for structural applications requiring higher strength.
  • Good toughness: Q345 steel exhibits good toughness and impact resistance, making it suitable for applications in which it may be subjected to dynamic loads or harsh environments.
  • Excellent weldability: Q345 steel has good weldability, allowing for ease of fabrication and welding in various structural applications.
  • Wide range of applications: Due to its combination of strength, toughness, and weldability, Q345 steel is widely used in construction, engineering, and other industries for structural components such as beams, columns, and structural shapes.
  • Corrosion resistance: Q345 steel can be alloyed to improve its corrosion resistance, making it suitable for use in environments where corrosion is a concern.

Q345 Steel Plate Chemical Property

Q345 Steel Chemical Property

Name

Grade

Chemical Composion%

Name

Grade

C≤

Mn

Si≤

P≤

S≤

V

Nb≤

Ti

Al≤

Q345

A

0.2

1.00-1.60

0.55

0.045

0.045

0.02-0.15

0.015-0.060

0.2

 

Q345

B

0.2

1.00-1.60

0.55

0.04

0.04

0.02-0.15

0.015-0.060

0.2

 

Q345

C

0.2

1.00-1.60

0.55

0.035

0.035

0.02-0.15

0.015-0.060

0.2

0.015

Q345

D

0.18

1.00-1.60

0.55

0.03

0.03

0.02-0.15

0.015-0.060

0.2

0.015

Q345

E

0.18

1.00-1.60

0.55

0.025

0.025

0.02-0.15

0.015-0.060

0.2

0.015

 

Name

Grade

Tension Test

180℃ bending test d=Diameter of bending center

Name

Grade

Yield point, Mpa

Tensile Strength Mpa

Elongation %

Impact Power, AkV, J

a=Thickness of sample (Diameter)

Name

Grade

Thickness (Diameter Side Length) mm

Tensile Strength Mpa

Elongation %

Impact Power, AkV, J

a=Thickness of sample (Diameter)

Name

Grade

≤16

>16-35

>35-50

>50-100

Tensile Strength Mpa

Elongation %

+20℃

0℃

-20℃

-40℃

 

Name

Grade

Tensile Strength Mpa

 

Thickness of steel (Diameter) mm

Name

Grade

Tensile Strength Mpa

 

≤16

>60-100

Q345

A

345

325

295

275

470-630

21

      

Q345

B

345

325

295

275

470-630

21

34

     

Q345

C

345

325

295

275

470-630

22

 

34

    

Q345

D

345

325

295

275

470-630

22

  

34

   

Q345

E

345

325

295

275

470-630

22

   

27

  

Applications

  • Construction:Q345 steel is extensively used in the construction of buildings, bridges, and other structures due to its high strength, good weldability, and versatility in various construction applications.
  • Industrial Machinery:Q345 steel is employed in the manufacturing of industrial machinery and equipment due to its favorable mechanical properties, making it suitable for components that require strength and durability.
  • Pipelines:Q345 steel is used in the construction of pipelines for transporting liquids and gases in industries such as oil, gas, and petrochemicals due to its excellent toughness and resistance to corrosion.
  • Automotive Sector:Q345 steel is utilized in the automotive industry for manufacturing vehicle parts and components that require high strength and impact resistance, such as chassis frames and structural elements.
  • Shipbuilding:In shipbuilding, Q345 steel is used for constructing ship hulls, decks, and other structural components that require high strength and corrosion resistance in marine environments.
  • Pressure Vessels:Q345 steel is suitable for use in the fabrication of pressure vessels and boilers in industries like petrochemicals and power generation due to its high tensile strength and toughness.
  • Storage Tanks: Q345 steel is employed in the construction of storage tanks for storing various liquids and gases in industries like chemical processing and storage due to its durability and resistance to corrosion.
  • Offshore Structures:Q345 steel is used in the fabrication of offshore structures such as platforms and rigs due to its ability to withstand harsh marine environments and its excellent weldability for complex structures.

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