ASTM A297 Properties⚙️ (Chem., Mech. & Rankings) rev. 2022

In this post I'll talk about and give details about ASTM A297. First let's describe it and then have a look at its material's properties.

What is ASTM A297?

ASTM A297 is a Specification for Steel Castings, Iron-Chromium and Iron-Chromium-Nickel, Heat Resistant, for General Application

Category

Steel Castings

Scope

This specification covers iron-chromium and iron chromium- nickel alloy castings for heat-resistant service. The grades covered by this specification are general purpose alloys and no attempt has been made to include heat-resisting alloys used for special production application.

Ok let's start with ASTM A297 chemical composition.

Chemical Composition

Grade HK

C

0.20 - 0.60

Mn max.

2.00

P max.

0.04

S max.

0.04

Cr

24.0 - 28.0

Ni

18.0 - 22.0

Mo max.

0.50

Learn more about chemical composition.

Now it's the mechanical properties turn:

Yield Strength

Grade HK

35 ksi (240 MPa) min non mandatory

Learn more about what is yield strength.

Tensile Strength

Grade HK

65 ksi (450 MPa) min non mandatory

Learn more about what is tensile strength.

Elongation (min.) 50 mm

10% min. non mandatory.

Learn more about what is elongation.

Reduction of Area (min. %)

Not Required.

Learn more about reduction of area.

Density

7800 - 8000 kg/m3 (around 7.9 g/cm3 or 0.285 lb/in3).

Learn more about density.

Elastic Modulus

190 GPa (27557 ksi) - 210GPa (30458 ksi).

Learn more about the Elastic Modulus.

Poisson's Ratio

0.27 – 0.30.

Learn more about the poisson ratio.

Allowable Stress

Depends on the project (And its factor of safety).

Learn more about the what is allowable stress.

My Material's Rank

While 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 A297 currently ranks 90 in my yield strength index. This means there are other 89 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.

Details and PDF

Instructions:

1. Go to this page.
2. Type the name of the standard you are looking for in the search box. Tip: Don't forget to include "ASTM" as a keyword.
3. Read the details about the standard or download the PDF.

ASTM Classroom

Are you having trouble understanding the basics of ASTM?

What is the difference between Code, Standard & Specification?

This video will walk you through:

References

Citation

When 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 A297 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 References

A 217/A 217M Specification for Steel Castings, Martensitic⁣
Stainless and Alloy, for Pressure–Containing Parts, Suitable⁣
for High-Temperature Service2⁣
A 351/A 351M Specification for Castings, Austenitic, Austenitic–⁣
Ferritic (Duplex), for Pressure–Containing Parts2⁣
A 370 Test Methods and Definitions for Mechanical Testing⁣
of Steel Products3⁣
A 447/A 447M Specification for Steel Castings,⁣
Chromium-Nickel-Iron Alloy (25-12 Class), for High-⁣
Temperature Service2⁣
A 781/A 781M Specification for Castings, Steel and Alloy,⁣
Common Requirements, for General Industrial Use2⁣