AISI 1045 Carbon Steel Chemical Composition, Grade, Tables and PDF Online

AISI 1045 features medium carbon-content, which makes the metal known for high strength, wear resistance, and supreme toughness. Its chemical structure generally consists carbon (0.43-0.50%), manganese (0.60-0.90%) and percentages of phosphorus (0.04%) sulfur (0.05%) & silicon (0.10-0.40%). This delamination available is designed to let the 1045 steel be easily machined and welded and yet its core properties are not affected. This alloy is mostly industrial, in that it is used in different industrial areas eg gears and shafts and other machinery components. Grade 1045 steel has a very good dimensional stability while hardening and case hardening for extended durability. Moreover, it may be used to create tools and automotive elements to name a few. Functional features such as detailed tables and PDFs showing the material properties, grades, and specifications can be found on the internet and are readily accessible for engineers, manufacturers, and researchers working with different applications of the versatile carbon steel grade.

AISI 1045 Carbon Steel Chemical Composition And Grade Table

AISI 1045 is a medium carbon steel that is recognized as having excellent strength and impact properties. Its chemistry would generally be C, 0.45%; Mn, 0.75%; P, 0.03%; S, 0.04%; and Si, 0.40% plus the remaining Fe being the bulk. Having this alloy composition provides it with the right balance of hardness and ductility, which in turn makes it usable in so many another applications such as shafts, gears, bolts, machines parts, and so on. In terms of grade, AISI 1045 is regarded as a multipurpose and reliable option for many industrial and mechanical applications.

AISI 1045 Carbon Steel Composition Table
Elements Fe Mn C S P
Min (%) - 0.6 0.43 - -
Max (%) Balance 0.9 0.5 0.05 0.04

Advantages and Disadvantages of AISI 1045 Carbon Steel


  • Versatile: Recommended for different applications due to optimal properties.

  • Cost-effective: Moderate costs in casting, forming, and machining.

  • Machinability: Presents good machinability for shaping and forming processes.

  • Weldability: Desirable level of weldability for fabricated parts.


  • Limited Hardenability: Not suitable for applications requiring very high hardness.

  • Susceptible to Corrosion: Sensitive to moisture, prone to rust or corrosion without protection.

  • Lower Impact Toughness: Relatively lower toughness compared to other alloy steels.

  • Moderate Strength: May not provide utmost strength for highly stressed applications.

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