AISI 420 Martensitic Stainless Steel Chemical Composition & Properties, Grades, Tables and Online Pdf

AISI 420 is an additively manufactured martensitic stainless steel also known for AISI 420 stainless steel is a precipitation hardened, corrosion resistant and high hardness martensitic stainless steel. Its chemical structure usually contains 12-14% of chromium, which has excellent a corrosion resistant, and a carbon element with the ranges of around 0.15 to 0.40%, which is responsible for the hardness and strength. In addition to this the filings contains miniscule remains of various elements such as manganese, silicon, phosphorus, sulfur, and sometimes molybdenum. This grade can be heat treated and contributes to these traits; high mechanical features and anti-wear properties. It is used in a number of fields by aircraft, medical devices, cutleries, and surgical tools manufacturers . AISI 420 is readily available to the manufacturers in the annealed state and can be hardened by heat treatment. Characteristics of this material allow it to involve itself in various production needs related to the manufacturing of components with high strength, corrosion resistance, and durability. For the comprehensive data on them, refer to the AISI 420 Martensitic Stainless Steel Grade Table, Chart and PDF.

AISI 420 Martensitic Stainless Steel Chemical Composition And Grade Table

AISI 420 Martensitic Stainless Steel is a robust material highly recommended for its ability to protect against corrosion and to demonstrate excellent mechanical properties. Made of mainly of chromium, carbon, manganese, silicon, phosphorus, sulfur, and in some cases, nickel, they are as strong and hard. It a chemical composition that usually contains about 12-14% chromium and 0.15-0.40% carbon. Heating treatment procedures that transform AISI 420 steel will make it reach high levels of hardness. The table of compositions is shown on its grade, which allows engineers to choose the best option among the many options available for various applications, from cutlery and surgical instruments to industrial machinery components.

AISI 420 Martensitic Stainless Steel
Elements C Mn Si P S Cr
Min (%) 0.15 - - - - 12.0
Max (%) - 1 1 0.040 0.03 14.0

Advantages and Disadvantages of AISI 420 Martensitic Stainless Steel

    Advantages:

  • High Strength: Offers high tensile strength and hardness, ideal for areas requiring durability.

  • Corrosion Resistance: Provides good resistance to corrosion in mild conditions.

  • Heat Treatability: Can be quenched and tempered to achieve desired mechanical characteristics.

  • Ease of Machining: Favorable machinability compared to other martensitic stainless steel grades.

    Disadvantages:

  • Limited Toughness: Less tough than austenitic stainless steel, prone to fracture under impact.

  • Susceptibility to Corrosion: Susceptible to corrosion in presence of chlorides, demands regular cleaning.

  • Weldability Challenges: Requires preheating and post-weld heat treatment to avoid cracking.

  • Cost: More expensive than some other stainless steels due to alloying elements.

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