AISI 904L Stainless Steel Chemical Composition Properties, Grade, Table and Document

AISI 904L austenitic stainless steel containing high alloy has exceptional corrosion resistance especially towards acidic environments. By its chemical composition, it has a lot of chromium, nickel, molybdenum and copper as its principal elements which determine its efficiency in different uses: chemistry, pharmacy, marine applications and etc. With highest level of pitting resistance this grade successfully avoids the crevice corrosion and stress corrosion cracking. Typically utilized in the form of heat exchangers, tanks and piping, AISI 904L allows for not only all the needed durability but also years of usage. Its specifications as well as the mechanical qualities meet the AISI's and the ASTM International's standards. Besides, tables and documents that are comprehensive with regard to its composition, properties and grades, can be readily found in the engineering and used for reference purposes.

AISI 904L Stainless Steel Chemical Composition And Grade Table

AISI 904L stainless steel is a special high alloy, austenitic stainless steel that is characterized by remarkable corrosion resistance in the type of environments considered harsh. Cr, Ni, Mo and C like this, usually its chemical composition is hight. The actual percentage may slightly vary between manufacturers, but mostly it consists of about 20-25% chromium, 4.5-5.5% nickel, 23-28% molybdenum, and trace amounts of carbon (unless you count dietary imbalances). Such mixture of features is responsible for outstanding corrosion resistance against acids mostly from sulfuric acid source, chlorides, and pitting corrosion. AISI 904l has wide application in sectors such as chemical processing, pharmaceuticals, and offshore oil and gas.

AISI 904L Stainless Steel
Elements C Mn Si P S Cr Mo Ni Cu
Min (%) - - - - - 19 4 23 1
Max (%) 0.02 2 1 0.045 0.035 23 5 28 1

Advantages and Disadvantages of AISI 904L Stainless Steel


  • High corrosion resistance: Has a very good corrosion resistance that is capable of operating in different environments, including the acidic chloride containing environments.

  • Good formability: Has good formability enables it to be easily formed into different categories of structures.

  • High temperature resistance: Retains ductility and strength at high temperatures as strained by the boiler and turbine power industries.

  • Good weldability: It can be welded by conventional techniques without the likelihood of IG pinhole leakage.


  • Cost: Normally has higher cost than the regular plain austenitic stainless steels.

  • Limited availability: It may not be as easily accessible as the other forms of stainless steel that are found in the market.

  • Sensitivity to embrittlement: Needs to manage the co –forming ratio and heat treatment schedule so that the part does not become brittle during fabrication.

  • Machinability: It may also be difficult to manage because it has a high work hardening rate, which could make it hard to machine.

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