ASTM A449 Properties⚙️ (Chem., Mech. & Rankings) rev. 2022

In this post I'll talk about and give details about ASTM A449. First let's describe it and then have a look at its material's properties.

What is ASTM A449?

ASTM A449 is a Specification for Hex Cap Screws, Bolts and Studs, Steel, Heat Treated, 120/105/90 ksi Minimum Tensile Strength, General Use.


Steel Bolting Materials


This specification covers quenched and tempered steel hex cap screws, bolts, and studs.

Ok let's start with ASTM A449 chemical composition.

Chemical Composition

Type 1 Carbon Steel


0.30 - 0.52

Mn min.


P max.


S max.



0.15 - 0.30

Learn more about chemical composition.

Now it's the mechanical properties turn:

Yield Strength

Machined specimens (up to 1 in.)

92 ksi min.

Learn more about what is yield strength.

Tensile Strength

Machined specimens (up to 1 in.)

120 ksi min.

Learn more about what is tensile strength.

Elongation (min.) 4D


Learn more about what is elongation.

Reduction of Area (min. %)


Learn more about reduction of area.

Hardness Requirements

up to 1 in.

253 to 319 HB

Learn more about what is hardness.

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 A449 currently ranks 152 in my yield strength index. This means there are other 151 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


  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:



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 A449 Properties (Chem., Mech. & Rankings). Materials Blog. 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

A563 Specification for Carbon and Alloy Steel Nuts⁣
A751 Test Methods, Practices, and Terminology for Chemical⁣
Analysis of Steel Products⁣
B695 Specification for Coatings of Zinc Mechanically Deposited⁣
on Iron and Steel⁣
D3951 Practice for Commercial Packaging⁣
F436 Specification for Hardened Steel Washers⁣
F606 Test Methods for Determining the Mechanical Properties⁣
of Externally and Internally Threaded Fasteners,⁣
Washers, Direct Tension Indicators, and Rivets⁣
F788/F788M Specification for Surface Discontinuities of⁣
Bolts, Screws, and Studs, Inch and Metric Series⁣
F1470 Practice for Fastener Sampling for Specified Mechanical⁣
Properties and Performance Inspection⁣
F1789 Terminology for F16 Mechanical Fasteners⁣
F2329 Specification for Zinc Coating, Hot-Dip, Requirements⁣
for Application to Carbon and Alloy Steel Bolts,⁣
Screws, Washers, Nuts, and Special Threaded Fasteners⁣
G101 Guide for Estimating the Atmospheric Corrosion Resistance⁣
of Low-Alloy Steels⁣


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Materials: ASTM A449 Properties⚙️ (Chem., Mech. & Rankings) rev. 2022
ASTM A449 Properties⚙️ (Chem., Mech. & Rankings) rev. 2022
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