C45

C45 Carbon Steel Product Overview

C45, also known as EN 1.0503, AISI 1045, or DIN Ck45, is a medium-carbon steel standardized under EN 10083-2. Renowned for its balanced strength, toughness, and wear resistance, C45 is a versatile engineering steel suitable for applications requiring moderate hardness and good machinability. It is typically supplied in the normalized or hot-rolled condition (max 229 HB) and can be heat-treated (quenched and tempered) to achieve higher hardness (up to 55–58 HRC). Its medium carbon content ensures decent weldability with proper precautions, making it a cost-effective choice for general-purpose components.

Applications

C45 is widely used in engineering and industrial applications where moderate strength and durability are required:

Machinery Components:

• Shafts, axles, spindles, and crankshafts.
• Gears, sprockets, and couplings.
• Bolts, studs, and connecting rods.

Automotive:

• Transmission components, steering knuckles, and drive shafts.
• Forged parts like levers and brackets.

Other Uses:

• Agricultural equipment parts, such as plowshares and harrow discs.
• Tooling components like dies and punches.
• General-purpose structural parts in construction and manufacturing.

Chemical Composition

The chemical composition of C45 ensures its strength and machinability:

• Carbon (C): Provides hardness and strength.
• Manganese (Mn): Enhances toughness and hardenability.
• Silicon (Si): Improves strength and elasticity.
• Phosphorus (P) and Sulfur (S): Kept low to ensure quality and minimize brittleness.

Supply Size

C45 is available in various forms and sizes to meet industrial requirements:

• Round Bars:
  Diameter 16 mm to 700 mm.
• Flat Bars:
  Minimum: 10 mm thickness x 80 mm width.
  Maximum: 500 mm thickness x 2000 mm width.