ASTM A307 Properties (Chem., Mech. & Rankings) rev. 2021

In this post I'll talk about and give details about ASTM A307. First let's describe it and then have a look at its material's properties.

What is ASTM A307?

ASTM A307 is a Specification for Carbon Steel Bolts and Studs, 60 000 PSI Tensile Strength.


Steel Bolting Materials


This specification covers the chemical and mechanical requirements of three grades of carbon steel bolts and studs in sizes 1⁄4 in. through 4 in.

Ok let's start with ASTM A307 chemical composition.

Chemical Composition

Grade B

C max.


Mn max.


P max.


S max.


Learn more about chemical composition.

Now it's the mechanical properties turn:

Tensile Strength

Grade B

60 - 100 ksi min

Learn more about what is tensile strength.

Elongation (min.) 50 mm


Learn more about what is elongation.

Reduction of Area (min. %)

Not Required.

Learn more about reduction of area.

Hardness Requirements

Grade B

121 to 212 HB or 69 to 95 HRB

Learn more about what is hardness.


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 A307 currently ranks 147 in my yield strength index. This means there are other 146 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 A307 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⁣
A706/A706M Specification for Low-Alloy Steel Deformed⁣
and Plain Bars for Concrete Reinforcement⁣
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⁣
F606 Test Methods for Determining the Mechanical Properties⁣
of Externally and Internally Threaded Fasteners,⁣
Washers, Direct Tension Indicators, and Rivets⁣
F1470 Practice for Fastener Sampling for Specified Mechanical⁣
Properties and Performance Inspection⁣
F1554 Specification for Anchor Bolts, Steel, 36, 55, and⁣
105-ksi Yield Strength⁣
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⁣


Who is Gelson Luz anyway?

Gelson Luz is a Mechanical Engineer, expert in welding and passionate about materials. Search for "Gelson Luz" in your favorite browser to learn more.

Materials: ASTM A307 Properties (Chem., Mech. & Rankings) rev. 2021
ASTM A307 Properties (Chem., Mech. & Rankings) rev. 2021
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