What is ASTM A738?ASTM A738 is a Specification for Pressure Vessel Plates, Heat-Treated, Carbon-Manganese-Silicon Steel, for Moderate and Lower Temperature Service.
CategorySteel Plates, Sheets, and Strip for Pressure Vessels
ScopeThis specification covers heat-treated carbon manganese- silicon steel plates intended for use in welded pressure vessels at moderate and lower temperature service.
Ok let's start with ASTM A738 chemical composition.
Mn0.90 - 1.50
Si0.15 - 0.55
Nn + V max.0.08
Learn more about chemical composition.
Now it's the mechanical properties turn:
Grade B60 ksi (415 MPa) min.
Learn more about what is yield strength.
Grade B85 - 102 ksi (585 - 705 MPa)
Learn more about what is tensile strength.
Elongation (min.) 50 mm0.2.
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 A738 currently ranks 39 in my yield strength index. This means there are other 38 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 A738 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