What is ASTM A312?ASTM A312 is a Specification for Seamless, Welded, and Heavily Cold Worked Austenitic Stainless Steel Pipes
CategoryCorrosion-Resisting and Heat-Resisting Steels
ScopeThis specification covers seamless, straight-seam welded, and heavily cold worked welded austenitic stainless steel pipe intended for high-temperature and general corrosive service.
Ok let's start with ASTM A312 chemical composition.
Cr18.0 - 20.0
Ni8.0 - 11.0
Learn more about chemical composition.
Now it's the mechanical properties turn:
Grade TP30430 ksi (205 MPa) min
Learn more about what is yield strength.
Grade TP30475 ksi (515 MPa) min
Learn more about what is tensile strength.
Elongation (min.) 50 mm35% (longitudinal).
Learn more about what is elongation.
Reduction of Area (min. %)Not Required.
Learn more about reduction of area.
Density7480 - 8000 kg/m3 (around 7.9 g/cm3 or 0.285 lb/in3).
Learn more about density.
Elastic Modulus180 GPa (26107 ksi) - 210GPa (30458 ksi).
Learn more about the Elastic Modulus.
Poisson's RatioUsually around 0.26 – 0.31.
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 A312 currently ranks 116 in my yield strength index. This means there are other 115 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 A312 Properties (Chem., Mech. & Rankings). Materials Blog. Gelsonluz.com. dd mmmm. yyyy. <URL>
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Other ReferencesA262 Practices for Detecting Susceptibility to Intergranular
Attack in Austenitic Stainless Steels
A370 Test Methods and Definitions for Mechanical Testing
of Steel Products
A941 Terminology Relating to Steel, Stainless Steel, Related
Alloys, and Ferroalloys
A999/A999M Specification for General Requirements for
Alloy and Stainless Steel Pipe
A1016/A1016M Specification for General Requirements for
Ferritic Alloy Steel, Austenitic Alloy Steel, and Stainless
E112 Test Methods for Determining Average Grain Size
E381 Method of Macroetch Testing Steel Bars, Billets,
Blooms, and Forgings