ASTM A519 1026 Seamless Mechanical Tubing (UNS G10260)
ASTM A519 1026 (UNS G10260) seamless mechanical tubing is a medium carbon steel product widely used for high-strength mechanical and automotive applications. Manufactured through hot-finished or cold-drawn processes, Grade 1026 offers excellent toughness, improved machinability, reliable weldability, and superior dimensional accuracy. With its higher carbon content compared to lower grades, A519 1026 is preferred for hydraulic cylinders, heavy-duty shafts, machinery components, and precision parts requiring enhanced strength and performance under load.
Key Features
- Medium carbon steel with higher strength and durability
- Excellent machinability and weldability
- Suitable for carburizing, heat treatment, and forming operations
- High dimensional accuracy and superior surface finish
- Ideal for high-pressure hydraulic applications
- Available in both HFS (Hot Finished) and CDS (Cold Drawn) conditions
Equivalent Grades
| Standard | Grade |
|---|---|
| UNS | G10260 |
| SAE | 1026 |
| AISI | 1026 |
| JIS | S25C / S28C (Closest Equivalent) |
| EN | C25E / C30E (Nearest Match) |
Available Sizes
- Outside Diameter (OD): 10 mm to 323.9 mm
- Wall Thickness: 1 mm to 40 mm
- Available Lengths: 4–7 m (SRL), 7–13 m (DRL), Custom up to 13 m
ASTM A519 1026 Chemical Composition
| Element | Content (%) |
|---|---|
| Carbon (C) | 0.22 – 0.29 |
| Manganese (Mn) | 0.60 – 0.90 |
| Phosphorus (P) | 0.040 max |
| Sulfur (S) | 0.050 max |
| Silicon (Si) | 0.15 – 0.35 |
| Iron (Fe) | Balance |
ASTM A519 1026 Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength | 485 – 620 MPa |
| Yield Strength | 275 MPa (min) |
| Elongation | 22% (min) |
| Hardness | 121 – 179 HB |
Physical Properties
| Property | Value |
|---|---|
| Density | 7.85 g/cm³ |
| Elastic Modulus | 200 GPa |
| Poisson’s Ratio | 0.29 |
| Thermal Conductivity | 51 W/m·K |
| Melting Point | ~1510°C |
Type of ASTM A519 1026 Tube
- Seamless Mechanical Tubing
- Cold Drawn Seamless (CDS) Tubing
- Hot Finished Seamless (HFS) Tubing
- DOM Tubing
- Annealed Tube
- Normalized Tube
- Quenched & Tempered Tube
- Carburizing Grade Tubing
- Cut-to-Length Precision Tubes
Applications
- Hydraulic cylinder barrels
- Automotive parts & components
- High-strength machinery parts
- Heavy-duty shafts & axles
- Bushings, sleeves, and bearings
- Structural and mechanical assemblies
- Precision-engineered components
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