What is ASTM A204?ASTM A204 is a Specification for Pressure Vessel Plates, Alloy Steel, Molybdenum.
CategorySteel Plates, Sheets, and Strip for Pressure Vessels
ScopeThis specification covers molybdenum-alloy steel plates, intended particularly for welded boilers and other pressure vessels.
Ok let's start with ASTM A204 chemical composition.
Si0.15 - 0.40
Mo0.45 - 0.60
Learn more about chemical composition.
Now it's the mechanical properties turn:
Grade B40 ksi (275 MPa) min
Learn more about what is yield strength.
Grade B70 - 90 (485 - 620 MPa)
Learn more about what is tensile strength.
Elongation (min.) 200 mm0.17.
Learn more about what is elongation.
Reduction of Area (min. %)Not Required.
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 A204 currently ranks 68 in my yield strength index. This means there are other 67 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:
CitationWhen you need to include a fact or piece of information in an assignment or essay you should also include where and how you found that piece of information.
That gives credibility to your paper and it is sometimes required in higher education.
To make your life (and citation) easier just copy & paste the information below into your assignment or essay:
Luz, Gelson. ASTM A204 Properties (Chem., Mech. & Rankings). Materials Blog. Gelsonluz.com. dd mmmm. yyyy. <URL>
Now replace dd, mmmm and yyyy with the day, month, and year you browsed this page. Also replace URL for the actual url of this page (The < and > stay, ok?). This citation format is based on MLA.
Other ReferencesA20/A20M Specification for General Requirements for Steel
Plates for Pressure Vessels
A435/A435M Specification for Straight-Beam Ultrasonic
Examination of Steel Plates
A577/A577M Specification for Ultrasonic Angle-Beam Examination
of Steel Plates
A578/A578M Specification for Straight-Beam Ultrasonic
Examination of Rolled Steel Plates for Special Applications