AISI 4815 Alloy Steel Chemical Composition & Properties, Grade, Table and Document

The AISI 4815 alloy steel stands out among other low-carbon nickel-chromium-molybdenum steels because of its extended range of hardenability and shock resistance. Composed of 0.8 to 1.1% carbon, 1.45 to 1.95% manganese, 0.4 to 0.75% chromium, and 0.2 to 0.35% molybdenum, it has high levels of overall strength and shows good wear resistance. Stainless steel AISI 4815 overruns with maximum wear fatigue stress and impact endurance, which is used in gears, shafts and other gear parts. Such characteristics as high hardenability as well as a good machinability at normalized and annealed conditions have also been proved. Moreover, the material provides some welding advantages too. Furthermore, it matches both ASTM A29 and ASTM A322 standards. Therefore, AISI 4815 perfectly fits the bill. The chemical composition, properties, grade, and accompanying table, chart and documentation of steel including the specification sheets and standards are clear and readily provided by the manufacturers and industry standards organization

AISI 4815 Alloy Steel Chemical Composition And Grade Table

AISI 4815, which is a low alloy steel, is highly popular due to its outstanding combination of tensile properties and toughness. Its chemical profile is usually filled by carbon, manganese, silicon, sulfur, phosphorus, chromium, nickel, molybdenum, and vanadium, in most cases. The table of grade AISI 4815 provides the evidence of it being appropriate to exploit in machining processes, where the requirements are for the high strength and resistance to fatigue and wear. With a combination of alloying elements, this super-alloy exhibits excellent hardenability and machinability which have made it a top material necessary in various industries like automotive, aerospace, and machinery for which performance and dependability are critical.

AISI 4815 Alloy Steel Composition Table
Elements Iron, Fe Carbon, C Manganese, Mn Silicon, Si Nickel, Ni Molybdenum, Mo Phosphorous, P Sulfur, S
Min (%) - 0.13 0.4 0.15 3.25 0.2 - -
Max (%) Balance 0.18 0.6 0.3 3.75 0.3 0.035 0.04

Advantages and Disadvantages of AISI 4815 Alloy Steel


  • High Strength: Provides good strength properties for various applications.

  • Good Hardenability: Capable of achieving high hardness through heat treatment.

  • Excellent Wear Resistance: Resistant to wear and abrasion, enhancing longevity.

  • Machinability: Easier to machine compared to some other alloy steels.


  • Limited Weldability: Challenges in welding due to its hardenability.

  • Cost: Higher cost compared to carbon steels.

  • Cracking Risk: High risk of cracking during heat treatment.

  • Complex Heat Treatment: Requires precise control during heat treatment.

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