SAE 1018 Properties ⚙️ (Chem., Mech. & Rankings) rev. 2022


In this post I'll talk about SAE 1018. First let's describe it and then have a look at its material's properties.

What is SAE 1018?

SAE 1018 carbon steel is a free machining grade that is the most commonly available grade around the world.


SAE 1018 carbon steel is commonly used in high volume screw machine parts applications.

UNS Number


Ok let's start with SAE 1018 Chemical Composition.

Chemical Composition

C, Carbon


Mn, Manganese


P, Phosphorus max.


S, Sulfur max.


Learn more about Chemical Composition.

Now it's the mechanical properties turn:

Yield Strength

240 - 400 MPa

Learn more about Yield Strength.

Tensile Strength

430 - 480 MPa

Learn more about Tensile Strength.

Elongation (min.)

17 - 27%.

Learn more about Elongation.

Reduction of Area (min. %)

45 - 57%.

Learn more about Reduction of Area.



130 - 140

Learn more about Hardness.


7.9 g/cm3.

Learn more about Density.

Elastic Modulus

190 GPa.

Learn more about Elastic Modulus.

Poisson's ratio


Learn more about Poisson's ratio.

Allowable Stress or Factor of Safety

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

Learn more about Allowable Stress or Factor of Safety.

My Material's Ranking Research

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 SAE 1018 currently ranks 152 in my yield strength index. This means there are other 151 materials that are more resistant.

Note: I've analysed 162 materials in order to create an yield strength index. Check my material's comparison post for more details.

SAE Classroom

Are you having trouble understanding the basics of SAE?

What is SAE: Classification and specification?

This video will walk you through:


ASTM A519 and other references.


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 and paste the information below into your assignment or essay:

Luz, Gelson. SAE 1018 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. This citation format is based on MLA.

Equivalent Specifications

AMS 5069 ASTM A29 ASTM A512 ASTM A611 (D-1) ASTM A635⁣
AMS 5069A ASTM A510 ASTM A794 ASTM A519 ASTM A544⁣
ASTM A108 ASTM A513 ASTM A830 ASTM A545 ASTM A548⁣
ASTM A549 ASTM A659 SAE J412 SAE J1397 MIL S-11310 (CS 1018)⁣
ASTM A576 SAE J403 SAE J414 MIL J-1397 MIL J-403⁣
MIL J-412⁣


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Materials: SAE 1018 Properties ⚙️ (Chem., Mech. & Rankings) rev. 2022
SAE 1018 Properties ⚙️ (Chem., Mech. & Rankings) rev. 2022
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