What is ASTM A705?ASTM A705 is a Specification for Age-Hardening Stainless Steel Forgings.
CategoryCorrosion-Resisting and Heat-Resisting Steels
ScopeThis specification covers age-hardening stainless steel forgings for general use.
Ok let's start with ASTM A705 chemical composition.
Cr15.00 - 17.50
Ni3.00 - 5.00
Cu3.00 - 5.00
Learn more about chemical composition.
Now it's the mechanical properties turn:
Grade 630 (After age hardening at 480°C)170 ksi (1170 MPa) min.
Learn more about what is yield strength.
Grade 630 (After age hardening at 480°C)190 ksi (1310 MPa) min.
Learn more about what is tensile strength.
Elongation (min.) 50 mm0.1.
Learn more about what is elongation.
Reduction of Area (min. %)0.4.
Learn more about reduction of area.
Grade 630 (After age hardening at 480°C)40 HRC or 388 HB min.
Learn more about what is hardness.
Grade 630 (After age hardening at 620°C)41J min. At 20 to 25 °C
Learn more about impact testing (charpy v notch).
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 A705 currently ranks 3 in my yield strength index. This means there are other 2 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 A705 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 ReferencesA 370 Test Methods and Definitions for Mechanical Testing
of Steel Products
A 484/A 484M Specification for General Requirements
for Stainless Steel Bars, Billets, and Forgings
A 564/A 564M Specification for Hot-Rolled and Cold-
Finished Age-Hardening Stainless Steel Bars and Shapes
A 751 Test Methods, Practices, and Terminology for
Chemical Analysis of Steel Products
E 527 Practice for Numbering Metals and Alloys (UNS)