45# – S45C Steel Plate 1045 Carbon Coil C45 Carbon Sheet Factory Direct Supply

Product Name Carbon Steel Plate/Coil
Thickness 0.2-4mm,3-200mm
Steel Grade 45#
Coil Weight 3-10 Tons
Length 2m,2.44m,3m,5.8m,6m or as customers required
Width 1m,1.2m,1.22m,1.5m,1.8m,2m,2.2m or as customer required
Sample Free
Price Term TT/LC EX-Working,FOB, C&F, CIF ,CNF or others
Packing Standard export seaworthy package,suit for all kinds of transport,or as required.

Product Introduction

45# steel is a commonly used medium carbon structural steel in China. It belongs to the category of high-quality carbon structural steel, which is characterized by higher strength and deformation resistance than ordinary A3 steel. And its chemical composition and mechanical properties are regulated by the Chinese national standard GB/T699-1999.


45# steel is equivalent to 1045 in the United States, S45C in Japan, and C45 in Germany standards.


The GB/T699-1999 standard stipulates that the tensile strength is 600 MPa, the yield strength is a tensile strength is greater or equal to 355MPa, and the elongation is 16%.


45# carbon steel has the following general characteristics:


1)Medium Carbon Content: 45# steel belongs to the category of high-quality medium carbon structural steel, cold extruded, carburized and hardened steel. The carbon content of 45# steel is generally controlled at 0.30~0.50%, good cold and hot processing performance, good mechanical properties, low price and wide source, so it is widely used.


2)Good Weldability: 45# steel can be easily welded using common welding methods such as arc welding, resistance welding, and gas welding.


3)High Strength: Although it is a medium carbon steel, 20# steel has relatively high tensile strength, with a yield strength of 600 MPa and a tensile strength is greater or equal to 355 MPa.


4)Excellent Plasticity: 45# steel exhibits good plasticity, allowing it to be formed into various shapes and structures without fracturing.


5)Wide Application: 45# steel is widely used in general structural and engineering purposes, including construction, bridges, machinery manufacturing, transportation equipment, and other industries where strength and durability are required.

45# Steel Chemical Composition:


Composition (%)















45#Mechanical properties

45# carbon steel plate (also known as 1045 steel plate) has undergone proper heat treatment and usually has the following general mechanical properties:

1)Tensile Strength (Tensile Strength): about 600 MPa-800 MPa

2)Yield Strength (Yield Strength): about 355 MPa-650 MPa

3)Elongation (Elongation): about 16%-20%

4)Impact Toughness: Usually at a temperature of 20°C or lower, it has good toughness properties

These mechanical properties are typical values obtained after heat treatment, but the specific mechanical properties may vary depending on the heat treatment process, sheet thickness, and supplier.Generally speaking, 45#carbon steel plates have high strength and toughness after proper heat treatment, and are suitable for manufacturing mechanical parts that require higher strength and wear resistance.





45# steel has a wide range of applications in various industries due to its good mechanical properties and affordability. Some common applications of 45# steel include:


1)Construction: 45# steel is extensively used in the construction industry for various structural components, such as beams, columns, and frameworks. It is suitable for both residential and commercial construction projects.


2)Bridges: 45# steel is commonly used for bridge construction, including the fabrication of bridge girders, piers, and structural supports. Its high strength and good weldability make it suitable for bridge applications.


3)Machinery Manufacturing: 45# steel is employed in the manufacturing of machinery and equipment components, such as frames, chassis, and structural parts. Its versatility and easy machinability make it a preferred choice for various machinery applications.


4)Automotive Industry: 45# steel is utilized in the automotive industry for the production of components like car frames, chassis, and structural parts. Its high strength and good formability make it suitable for automotive applications.


  • Railway Vehicles: 45# steelis also used in the manufacturing of railway vehicles, including railcar bodies, underframes, and structural components. Its mechanical properties and durability meet the requirements of the railway industry.


6)Blanks and materials for shaft parts:45# steel is a common material for shaft parts. It is cheap and can obtain better cutting performance after quenching and tempering (or normalizing), and can obtain comprehensive mechanical properties such as high strength and toughness. The surface hardness after quenching can be improved.


7)General Fabrication: 45# steel is widely utilized in general fabrication processes where a medium carbon steel with good mechanical properties is required. It can be formed, welded, and machined to create various structures and components.

Classification By Size

The length is generally 2440mm, 2000mm, 3050mm, 4000mm, 3000mm, and the thickness is distinguished by cold rolling and hot rolling. Cold rolling mainly has thickness 1.0mm, 1.2mm, 1.5mm, 2.0mm, 2.5mm, 3.0mm. The main thickness of hot rolling is 3.0mm, 4.0mm, 6.0mm, 8.0mm, 10.0mm, and the width is generally 1000mm, 1219mm, 1500mm.Please contact customer service for general specifications.

Hot-rolled products have excellent properties such as high strength, good toughness, easy processing and good weldability, so they are widely used in manufacturing industries such as steel, construction, machinery, boilers, and pressure vessels. Application range: (1) After annealing, it is processed into ordinary cold rolling; (2) The galvanizing unit with pre-annealing treatment device processes galvanizing; (3) Panels that basically do not need to be processed.

Hot-rolled coils (in the form of flat plates or coils) generally have a thickness of 2.0-13.5mm, of which the price of 2.0-3.0mm hot coils gradually decreases from thin to thick; most steel mills have a basic price of 3.1mm-13.5mm Equivalent, the price of 3.1-4.0mm and 9.5mm-13.5mm hot plate coils in some manufacturers and markets may be higher than the price of 4.0mm-9.5mm plates. Hot plate coils represent products with a thickness of 5.5mm. Under normal circumstances, the price of flat plates is slightly higher than the price of coils.

Why Choose Us?

*Top 20 companies in steel industry trade volume.

*Customized processing steel one-stop purchase.

*Exports of steel exceeded tens of billions for 5 consecutive years.

**We have a complete set of testing equipment, such as ut & ET, hydraulic testing equipment, spectrometer, scanning electron microscope, etc, and have passed SGS TUV

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