ASTM A490 Properties⚙️ (Chem., Mech. & Rankings) rev. 2022

In this post I'll talk about and give details about ASTM A490. First let's describe it and then have a look at its material's properties.

What is ASTM A490?

ASTM A490 is a Specification for Structural Bolts, Alloy Steel, Heat Treated, 150 ksi Minimum Tensile Strength


Structural Bolts


This specification covers two types of quenched and tempered, alloy steel, heavy hex structural bolts having a tensile strength of 150 to 173 ksi.

Ok let's start with ASTM A490 chemical composition.

Chemical Composition

Type 3


0.20 - 0.53

Mn min.

0.30 - 0.53

P max.


S max.



0.20 - 0.60

Cr min.


Ni min.


Mo min.


Learn more about chemical composition.

Now it's the mechanical properties turn:

Tensile Strength

Full size bolts

90900 - 104850 lbf tensile load

Learn more about what is tensile strength.

Proof load

72700 lbf

Hardness Requirements

1 in. bolts

311 to 352 HB or 33 to 39 HRC

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 A490 currently ranks 154 in my yield strength index. This means there are other 153 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 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 A490 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

A 194/A 194M Specification for Carbon and Alloy Steel⁣
Nuts for Bolts for High-Pressure and High-Temperature⁣
A 325 Specification for Structural Bolts, Steel, Heat⁣
Treated, 120/105 ksi Minimum Tensile Strength⁣
A 354 Specification for Quenched and Tempered Alloy⁣
Steel Bolts, Studs, and Other Externally Threaded Fasteners⁣
A 563 Specification for Carbon and Alloy Steel Nuts⁣
A 751 Test Methods, Practices, and Terminology for⁣
Chemical Analysis of Steel Products⁣
D 3951 Practice for Commercial Packaging⁣
E 384 Test Method for Microindentationhardness of Materials⁣
E 709 Guide for Magnetic Particle Examination⁣
E 1444 Practice for Magnetic Particle Inspection⁣
F 436 Specification for Hardened Steel Washers⁣
F 606 Test Methods for Determining the Mechanical Properties⁣
of Externally and Internally Threaded Fasteners,⁣
Washers, and Rivets⁣
F 788/F 788M Specification for Surface Discontinuities of⁣
Bolts, Screws, and Studs, Inch and Metric Series⁣
F 959 Specification for Compressible-Washer-Type Direct⁣
Tension Indicators for Use with Structural Fasteners⁣
F 1470 Guide for Fastener Sampling for Specified Mechanical⁣
Properties and Performance Inspection⁣
F 1789 Terminology for F16 Mechanical Fasteners⁣
G 101 Guide for Estimating the Atmospheric Corrosion⁣
Resistance of Low-Alloy Steels⁣



Materials: ASTM A490 Properties⚙️ (Chem., Mech. & Rankings) rev. 2022
ASTM A490 Properties⚙️ (Chem., Mech. & Rankings) rev. 2022
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