In this post I'll talk about SAE 1045. First let's describe it and then have a look at its material's properties.
What is SAE 1045?SAE 1045 steel is characterized by good weldability, good machinability, and high strength and impact properties in either the normalized or hot-rolled condition.
ApplicationSAE 1045 is widely used for all industrial applications requiring more wear-resistance and strength.
Ok let's start with SAE 1045 Chemical Composition.
P, Phosphorus max.0.040
S, Sulfur max.0.050
Learn more about Chemical Composition.
Now it's the mechanical properties turn:
Typical properties45 ksi, 310 MPa (Hot Rolled). 80 ksi, 552 MPa (Cold Worked). 70 ksi, 483 MPa (Stress Relieved). 35 ksi, 241 MPa (Annealed). 48 ksi, 331 MPa (Normalized)
Learn more about Yield Strength.
Typical properties75 ksi, 517 MPa (Hot Rolled). 90 ksi, 621 MPa (Cold Worked). 80 ksi, 552 MPa (Stress Relieved). 65 ksi, 448 MPa (Annealed). 75 ksi, 517 MPa (Normalized)
Learn more about Tensile Strength.
Elongation (min.) 50 mm typical15% (Hot Rolled). 5% (Cold Worked). 8% (Stress Relieved). 20% (Annealed). 15% (Normalized).
Learn more about Elongation.
Reduction of Area (min. %)40 - 51%.
Learn more about Reduction of Area.
Typical Rockwell80 HRB (Hot Rolled). 90 HRB (Cold Worked). 85 HRB (Stress Relieved). 72 HRB (Annealed). 80 HRB (Normalized)
Learn more about Hardness.
Learn more about Density.
Elastic Modulus190 GPa.
Learn more about Elastic Modulus.
Learn more about Poisson's ratio.
Allowable Stress or Factor of SafetyDepends on the project (And its factor of safety).
Learn more about Allowable Stress or Factor of Safety.
My Material's Ranking ResearchWhile 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 1045 currently ranks 119 in my yield strength index. This means there are other 118 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 ClassroomAre you having trouble understanding the basics of SAE?
What is SAE: Classification and specification?
This video will walk you through:
ReferencesASTM A519 and other references.
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Luz, Gelson. SAE 1045 Properties (Chem., Mech. & Rankings). Materials Blog. Gelsonluz.com. dd mmmm. yyyy. URL
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AFNOR XC 42 TS AFNOR XC 45 AFNOR XC 48 AFNOR XC42
DIN 1.1191 JIS S 45C JIS S 48 C SS 1672
ASTM A29 ASTM A510 ASTM A519 ASTM A576
FED QQ-S-635 (C1045) FED QQ-S-700 (1045) SAE J403 ASTM A682
SAE J414 ASTM A183 (2-Nuts) ASTM A236 (1045) SAE J412
ASTM A266 (1045) ASTM A827 ASTM A830 QQ S700 (C1045)
SAE J1397 (1045)