What is Grade 1045?
Grade 1045 is a medium carbon steel used for mechanical parts. This 1045 tube gets its additional strength from quenching and tempering. It still has good machinability when annealed. Because the carbon stays between 0.43-0.50%, the metal gets much harder during heat treatment. This makes it a great choice for parts that need to resist wear and stay strong.
ASTM A519 Grade 1045 Tube Specifications
Technical specs for ASTM A519 Grade 1045 seamless mechanical tubing show the standard, the grade, dimensions, and other information:
| Standard | ASTM A519 |
|---|---|
| Grade | 1045 |
| UNS Number | G10450 |
| Manufacturing Type | Seamless Mechanical Tubing |
| Conditions | Cold Drawn (CDS), Hot Finished (HFS) |
| Outside Diameter (OD) | 10 mm – 323.9 mm |
| Wall Thickness | 1 mm – 40 mm |
| Length | SRL, DRL, Custom Cut |
| Form | Round Tube |
ASTM A519 Grade 1045 Tube Chemical Composition
The table below shows the chemical composition of SAE 1045 steel per ASTM A519.
| Element | Carbon (C) | Manganese (Mn) | Phosphorus (P) | Sulfur (S) | Silicon (Si) | Iron (Fe) |
|---|---|---|---|---|---|---|
| Content (%) | 0.43 – 0.50 | 0.60 – 0.90 | 0.040 max | 0.050 max | 0.15 – 0.35 | Balance |
ASTM A519 Grade 1045 Tube Mechanical Properties
These are the mechanical properties of 1045 steel tube that include the tensile strength, yield strength, and other factors.
| Property | Value |
|---|---|
| Tensile Strength | 620 – 760 MPa |
| Yield Strength | 330 MPa (min) |
| Elongation | 16% (min) |
| Hardness | 170 – 210 HB |
ASTM A519 Grade 1045 Tube Equivalent Designation
Check these Grade 1045 equivalents for international standards, where the UNS is G10450, DIN is 1.0503, and so on.
| Standard | UNS | SAE | AISI | JIS | EN |
|---|---|---|---|---|---|
| Grade | G10450 | 1045 | 1045 | S45C | C45E / C45R |
Applications
The 1045 tubing serves 2 demanding mechanical applications requiring heat treatment: