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The SAE steel grades system is a standard alloy numbering system (SAE J1086 – Numbering Metals and Alloys) for steel grades maintained by SAE International.. In the 1930s and 1940s, the American Iron and Steel Institute (AISI) and SAE were both involved in efforts to standardize such a numbering system for steels.
For alloys in general (including steel), unified numbering system (UNS) of ASTM International and the Society of Automotive Engineers (SAE). American steel grades : AISI/SAE steel grades standard; British Standards; International Organization for Standardization ISO/TS 4949:2016; European standards – EN 10027
A UNS number only defines a specific chemical composition, it does not provided full material specification. Requirements such as material properties (yield strength, ultimate strength, hardness, etc.), heat treatment, form (rolled, cast, forged, flanges, tubes, bars, etc.), purpose (high temperature, boilers and pressure vessels, etc.) and testing methods are all specified in the material or ...
Applications for superaustenitic stainless steel alloy AL-6XN include chemical processing, oil and gas, medical – sterilization and power generation [3] with specific applications identified in desalination, water piping systems. transformer cases in marine environments, food processing equipment, FGD scrubbers, reverse osmosis, and heat exchangers.
Alloy 20 is an austenitic stainless steel containing less than 50% iron developed for applications involving sulfuric acid.Its corrosion resistance also finds other uses in the chemical, petrochemical, power generation, and plastics industries.
Microstructures of four kinds of duplex stainless steel in each direction. Duplex stainless steels are usually divided into three groups based on their pitting corrosion resistance, characterised by the pitting resistance equivalence number, PREN = %Cr + 3.3 %Mo + 16 %N.
X46Cr13 has good workability when hot, and potential to reach high hardness of up to 56 HRC. [4] [5] It contains a moderately high carbon ratio of approximately 0.46% which gives it a good compromise between high hardness and corrosion resistance for many applications.
The three ASTM established grades of low-alloy special purpose steel are L2, L3, and L6. [1] This grade originally contained L1, L4, L5 and L7 as well as three F grades (F1, F2, and F3) but because of falling demand only grades L2 and L6 remain in production.