ASTM A519 1045 Tubes | AISI 1045 Carbon Steel Seamless Tubing
When industries require high strength, excellent machinability, and long-term durability, ASTM A519 1045 tubes are one of the most reliable solutions available. These tubes are widely used in automotive, engineering, hydraulic, and industrial machinery applications where performance under mechanical stress is critical.
We supply ASTM A519 Grade 1045 SAE 1045 seamless tubing that meets international standards and real-world application demands. Our experience in supplying carbon steel mechanical tubing allows us to understand how AISI 1045 steel performs not just on paper—but in actual service conditions.
What Are ASTM A519 1045 Tubes?
ASTM A519 is a specification that covers seamless carbon steel mechanical tubing intended for mechanical and structural applications. Grade 1045 refers to a medium carbon steel grade known for its higher strength compared to low-carbon steels.
ASTM A519 ASME SA519 Grade 1045 tubes are typically manufactured using a seamless cold-drawn process, which improves dimensional accuracy, surface finish, and mechanical strength.
In simple terms:
- ASTM A519 defines how the tube is made
- Grade 1045 defines the steel’s chemical and mechanical behavior
Understanding AISI 1045 Medium Carbon Steel
AISI 1045 steel is classified as a medium carbon steel, containing approximately 0.45% carbon. This higher carbon content gives the material increased strength, hardness, and wear resistance compared to low-carbon steels.
Key Benefits of AISI 1045 Steel
- Higher tensile and yield strength
- Good machinability
- Excellent response to heat treatment
- Better wear resistance
- Suitable for cold-drawn mechanical tubing
Because of these qualities, AISI 1045 cold drawn steel is widely used in shafts, axles, cylinders, and machine components.
Advantages of ASTM A519 1045 Tubes
Choosing ASTM A519 1045 tubes offers several practical advantages:
- High strength and toughness
- Excellent machinability
- Uniform seamless structure
- Reliable performance under load
- Cost-effective for heavy-duty use
- Long service life
These benefits make ASTM A519 ASME SA519 Grade 1045 tubing a preferred material for mechanical engineers.
Cold Drawn Seamless Tubing – Why It Matters
Most ASTM A519 Grade 1045 tubings are supplied in cold-drawn (CD) condition.
AISI 1045 Steel Cold Drawn – Advantages
- Improved dimensional accuracy
- Smooth surface finish
- Increased strength
- Better fatigue resistance
- Reduced machining time
Because of this, AISI 1045 CD tubing is preferred for precision mechanical applications.
ASTM A519 Grade 1045 Tubes – Specification Overview
Before selecting tubing, buyers often look for a clear technical overview. Below is a simplified specification chart for ASTM A519 Grade 1045 carbon steel seamless tubings.
ASTM A519 Grade 1045 – Specification Chart
| Parameter | Details |
| Standard | ASTM A519 / ASME SA519 |
| Grade | 1045 |
| Material Type | Medium Carbon Steel |
| Manufacturing Process | Seamless / Cold Drawn |
| Surface Finish | Cold Drawn (CD), Stress Relieved |
| Form | Round Mechanical Tubing |
| Heat Treatment | Annealed / Stress Relieved (as required) |
| Application | Mechanical & Structural (Non-pressure) |
Chemical Composition of ASTM A519 Grade 1045 Tubes
The performance of ASTM A519 Grade 1045 carbon steel mechanical tubing depends heavily on its chemical composition. Controlled chemistry ensures predictable strength and machinability.
AISI 1045 Steel – Chemical Composition Chart
| Element | Percentage (%) |
| Carbon (C) | 0.43 – 0.50 |
| Manganese (Mn) | 0.60 – 0.90 |
| Phosphorus (P) | ≤ 0.040 |
| Sulfur (S) | ≤ 0.050 |
| Iron (Fe) | Balance |
This chemical balance is what gives 1045 carbon steel its well-known combination of strength and toughness.
Mechanical Properties of ASTM A519 Grade 1045 Tubings
When engineers choose SAE 1045 seamless tubing, they are primarily focused on mechanical performance. Below are the typical mechanical properties of ASTM A519 ASME SA519 Grade 1045 in cold-drawn condition.
ASTM A519 Grade 1045 – Mechanical Properties Chart
| Property | Typical Value |
| Tensile Strength | 585 – 700 MPa |
| Yield Strength (1045 Carbon Steel Yield Strength) | 310 – 450 MPa |
| Elongation | ≥ 12% |
| Hardness | 170 – 210 HB |
| Modulus of Elasticity | ~200 GPa |
These values make ASTM A519 Grade 1045 tubings ideal for components subjected to repeated loads and mechanical stress.
ASTM A519 Grade 1045 vs ASTM A519 SAE 1035 Seamless Tubing
Many buyers compare ASTM A519 SAE 1035 seamless tubing with ASTM A519 Grade 1045 tubings.
| Feature | SAE 1035 | SAE 1045 |
| Carbon Content | Lower | Higher |
| Strength | Medium | Higher |
| Wear Resistance | Moderate | Better |
| Machinability | Good | Very Good |
| Typical Use | Light-duty parts | Medium to heavy-duty parts |
For higher strength and longer service life, 1045 steel is often the better choice.
Applications of ASTM A519 Grade 1045 Carbon Steel Seamless Tubings
Thanks to its mechanical reliability, ASTM A519 Grade 1045 carbon steel mechanical tubing is widely used across industries.
- Automotive axles and drive shafts
- Hydraulic and pneumatic cylinders
- Engineering machinery parts
- Industrial rollers and pins
- Agricultural equipment components
- Machine frames and structural parts
Where durability and precision are required, SAE 1045 seamless tubing consistently performs.
Why Choose Us as Your ASTM A519 Grade 1045 Tubings Supplier?
We don’t just supply material—we understand its application. Our experience with ASTM A519 Grade 1045 carbon steel seamless tubings allows us to guide customers toward the right specifications, finishes, and sizes. What you can expect from us:
- Consistent quality
- Standard-compliant material
- Application-focused support
- Reliable delivery timelines
- Honest technical guidance
ASTM A519 1045 tubes provide the perfect balance of strength, machinability, and durability for mechanical applications. Whether you require AISI 1045 steel cold drawn, SAE 1045 seamless tubing, or ASTM A519 Grade 1045 carbon steel mechanical tubing, this grade offers dependable long-term performance.
If you’re looking for tubing that performs reliably under mechanical stress and meets international standards, ASTM A519 ASME SA519 Grade 1045 is a proven solution—and we’re here to supply it with confidence.
Global Reach
ASC LLP boasts a robust global presence, committed to delivering unparalleled service and quality to clients around the world. Our dedication to prompt delivery and exceptional customer care sets us apart in the industry. Major corporations across the USA, Europe, Asia, and other regions place their trust in our high-quality ASTM A519 1045 Tubes. This widespread trust underscores our reputation for reliability and excellence. By consistently meeting and exceeding the expectations of our international clientele, we continue to solidify our position as a leader in the global steel market.
Countries We Export To
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