AISI 5130h Alloy Steel Chemical Composition, Grade, Chart and Document

AISI 5130H alloy steel, an improved version of 4130, is very useful in cases when high strengths and toughness are required, therefore it becomes really suitable for such purposes as anti-breakage applications. Its chemical constitution, which contains carbon, manganese, chromium and also molybdenum, is partly responsible for it excellent mechanical properties. Among diverse industries, particular applications in aerospace, automotive, and industrial sectors being covered, the alloy is renowned for its apparatus for heat treatability and weldability being specific cross-sectional processes. The table describing the content of M42 gives an idea about it’s alloying elements, hence, specific material selection for different applications could be achieved. Moreover, the documentation is also included in the AISI 5130H, presenting in detail the specifications, processing guidelines, and performance data to the engineers and manufacturers to enable them to use it optimally for the desired outcomes.

AISI 5130H Alloy Steel Chemical Composition And Grade Table

These are an AISI 5130H alloy steel, which is of chromium-molybdenum low alloy range and have very good strength and toughness. The compound with a usual ratio of elementary components like the carbon, manganese, chromium, molybdenum, silicon, and phosphorus is one possible option. The table of the grade summary indicates certain percentages ,which are essential to obtaining material properties of the required constant in various applications. Engineers and manufacturers refer to the steel alloys table during the selection of the right alloy steel for the particular need, whether it is an automobile component, machine part, or an essential structure, which eventually helps in ensuring reliability and durability in relatively demanding environments.

AISI 5130H Alloy Steel Composition Table
Elements C Mn Cr P S Si Fe
Min (%) 0.27 0.6 0.75 - - 0.15 -
Max (%) 0.33 1.1 1.2 0.035 0.04 0.3 Balance

Advantages and Disadvantages of AISI 5130H Alloy Steel


  • High hardenability: Has the potential of being adapted to achieve the desired hardness throughout its cross-section.

  • Improved fatigue resistance: This is superior to the other alloy steels in terms of its fatigue life.

  • Good impact toughness: Endures impact loads while at the same time it does not fracture.

  • Versatile applications: It has suitability in various industries due to its strength and toughness that are required in industries.


  • Limited availability: Perhaps relatively more difficult to obtain as compared to the regular alloy steel grades.

  • Moderate weldability: Must be heated before welding and subsequently, it has to be put through post-weld heat treatment to ensure no crack formation.

  • Susceptible to decarburization: Surface may be trimmed in some way resulting in loss of carbon content hence affecting the hardness.

  • Moderate corrosion resistance: Have to be maintained properly due to tendency to develop corrosion when exposed to some conditions.

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