What is ASTM A250?ASTM A250 is a Specification for Electric-Resistance-Welded Ferritic Alloy-Steel Boiler and Superheater Tubes.
ScopeThis specification covers several grades, designated T1, T1a, T1b, T2, T11, T12 and T22, of minimum-wall-thickness, electric-resistance-welded, carbon-molybdenum and chromium-molybdenum alloy-steel, boiler and super heater tubes.
Ok let's start with ASTM A250 chemical composition.
C0.10 - 0.20
Mn0.30 - 0.80
Si0.10 - 0.50
Mo0.44 - 0.65
Learn more about chemical composition.
Now it's the mechanical properties turn:
Grade T130 ksi (205 MPa) min
Learn more about what is yield strength.
Grade T155 ksi (380 MPa) min
Learn more about what is tensile strength.
Elongation (min.) 50 mm0.3.
Learn more about what is elongation.
Reduction of Area (min. %)Not Required.
Learn more about reduction of area.
Grade T1146 HBW or 80 HRB max, depending on the wall thickness.
Learn more about what is hardness.
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 A250 currently ranks 110 in my yield strength index. This means there are other 109 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 A250 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 ReferencesA1016/A1016M Specification for General Requirements for
Ferritic Alloy Steel, Austenitic Alloy Steel, and Stainless
E213 Practice for Ultrasonic Testing of Metal Pipe and
E273 Practice for Ultrasonic Testing of the Weld Zone of
Welded Pipe and Tubing