What is ASTM A522?ASTM A522 is a Specification for Forged or Rolled 8 and 9% Nickel Alloy Steel Flanges, Fittings, Valves, and Parts for Low-Temperature Service.
CategorySteel Flanges, Fittings, Valves, and Parts
ScopeThis specification covers 8 and 9% nickel-alloy steel forged or rolled flanges, fittings, valves, and parts intended for use in welded pressure vessels for low-temperature service.
Ok let's start with ASTM A522 chemical composition.
Si0.15 - 0.30
Ni8.5 - 9.5
Learn more about chemical composition.
Now it's the mechanical properties turn:
Type 1 or 275 ksi (515 MPa) min. Yield strength
Learn more about what is yield strength.
Type 1 or 2100 ksi (690 MPa) min.
Learn more about what is tensile strength.
Elongation (min.) 50 mm0.22.
Learn more about what is elongation.
Reduction of Area (min. %)0.45.
Learn more about reduction of area.
Density7800 - 8000 kg/m3 (around 7.9 g/cm3 or 0.285 lb/in3).
Learn more about density.
Elastic Modulus190 GPa (27557 ksi) - 210GPa (30458 ksi).
Learn more about the Elastic Modulus.
Poisson's Ratio0.27 – 0.30.
Learn more about the poisson ratio.
Allowable StressDepends on the project (And its factor of safety).
Learn more about the what is allowable stress.
My Material's RankWhile engineers will often look for the cheapest material they can use, I took a different approach to material's selection to help newbie students.
I ranked materials according to their yield strengths and ASTM A522 currently ranks 27 in my yield strength index. This means there are other 26 materials that are more resistant.
Note: I've analysed 134 materials in order to create an yield strength index. Check my astm material's comparison post for more details.
ASTM ClassroomAre you having trouble understanding the basics of ASTM?
What is the difference between Code, Standard & Specification?
This video will walk you through:
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Luz, Gelson. ASTM A522 Properties (Chem., Mech. & Rankings). Materials Blog. Gelsonluz.com. dd mmmm. yyyy. <URL>
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Other ReferencesA 370 Test Methods and Definitions for Mechanical Testing
of Steel Products
A 788/A 788M Specification for Steel Forgings, General
A 961/A 961M Specification for Common Requirements
for Steel Flanges, Forged Fittings, Valves, and Parts for