SAE 1118 Properties (Chem., Mech. & Rankings) rev. 2022


In this post I'll talk about SAE 1118. First let's describe it and then have a look at its material's properties.

What is SAE 1118?

SAE 1118 carbon steel is a free machining steel. It is added with sulfur in order to improve its machining characteristics.


SAE 1118 carbon steel can be mainly used in free machining stock such as fasteners and screws.

UNS Number


Ok let's start with SAE 1118 Chemical Composition.

Chemical Composition

C, Carbon


Mn, Manganese


P, Phosphorus max.

0.040 max

S, Sulfur


Learn more about Chemical Composition.

Now it's the mechanical properties turn:

Yield Strength

Typical properties

35 ksi, 241 MPa (Hot Rolled). 60 ksi, 414 MPa (Cold Worked). 55 ksi, 379 MPa (Stress Relieved). 30 ksi, 207 MPa (Annealed). 35 ksi, 241 MPa (Normalized)

Learn more about Yield Strength.

Tensile Strength

Typical properties

50 ksi, 345 MPa (Hot Rolled). 75 ksi, 517 MPa (Cold Worked). 70 ksi, 483 MPa (Stress Relieved). 50 ksi, 345 MPa (Annealed). 55 ksi, 379 MPa (Normalized)

Learn more about Tensile Strength.

Elongation (min.) 50 mm typical

25% (Hot Rolled). 5% (Cold Worked). 8% (Stress Relieved). 25% (Annealed). 20% (Normalized).

Learn more about Elongation.


Typical Rockwell

55 HRB (Hot Rolled). 80 HRB (Cold Worked). 75 HRB (Stress Relieved). 55 HRB (Annealed). 60 HRB (Normalized)

Learn more about Hardness.


7.8 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 1118 currently ranks 151 in my yield strength index. This means there are other 150 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 1118 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

ASTM A510⁣
ASTM A576⁣
SAE J1397⁣
SAE J403⁣
SAE J412⁣
ASTM A107⁣
ASTM A108⁣
FED QQ-S-637 (1118)⁣
SAE J414⁣



Materials: SAE 1118 Properties (Chem., Mech. & Rankings) rev. 2022
SAE 1118 Properties (Chem., Mech. & Rankings) rev. 2022
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