High-strength Alloy Steel Seamless Tubing
Astm a519 aisi 4140 seamless tubes provide superior strength, toughness, and corrosion resistance, ideal for industrial piping, mechanical components, and high-stress applications.
High-strength Alloy Steel Seamless Tubing
Astm a519 aisi 4140 seamless tubes provide superior strength, toughness, and corrosion resistance, ideal for industrial piping, mechanical components, and high-stress applications.
ASTM A519 AISI 4140 Tubes are premium alloy steel tubing engineered for exceptional strength, toughness, and corrosion resistance in high-stress mechanical and structural applications. Conforming to the ASTM A519 standard, this seamless mechanical tubing is ideal for industries such as aerospace, automotive, oil and gas, and heavy machinery. With a steel number of 1.7225, the AISI 4140 grade features a composition of 0.38-0.43% carbon, 0.80-1.10% chromium, and 0.15-0.25% molybdenum, making it perfect for industrial piping systems requiring superior durability and performance under demanding conditions.
The ASTM A519 AISI 4140 Tubes are manufactured through hot-rolling or cold-drawing processes, followed by heat treatments such as normalizing, quenching, and tempering to optimize mechanical properties like hardness and toughness. Available in outer diameters from 1/4” to 50 7/8” and wall thicknesses from 1mm to 25mm, with lengths of 5.8m, 6m, 11.8m, or random (5-12m), they meet diverse project specifications. Surface treatments like galvanizing, FBE, or 3LPE coatings enhance corrosion resistance, protecting against wear in harsh environments, while plain, beveled, or threaded ends ensure seamless integration into industrial piping and mechanical systems.
The Seamless Mechanical Tubing undergoes rigorous testing, including tensile, hardness, flattening, and nondestructive tests, to ensure compliance with ASTM A519 standards. With a tensile strength of approximately 655 MPa (annealed) to 862 MPa (quenched and tempered) and a yield strength of 415 MPa (annealed) to 690 MPa (quenched and tempered), AISI 4140 tubing offers outstanding toughness and fatigue resistance, making it suitable for high-stress components like gears, shafts, and hydraulic systems. Its corrosion resistance, bolstered by chromium and molybdenum, ensures reliability in boiler pipeline protection and other aggressive environments.
Compatible with fittings and components conforming to standards like ASTM A234 or A105, the ASTM A519 AISI 4140 Tubes integrate seamlessly into complex industrial piping networks. Compared to carbon steel grades like ASTM A519 1026 or other alloy grades like ASTM A519 4130, AISI 4140 offers superior strength and hardness, making it a preferred choice for heavy-duty applications requiring high-strength piping. Its heat-treatable nature allows for tailored properties, such as increased hardness or toughness, to meet specific operational demands.
Engineered to address challenges like pipeline wear, corrosion, and mechanical stress, the ASTM A519 AISI 4140 Tubes deliver unmatched performance in high-throughput industrial systems. Their seamless construction and robust alloy composition ensure durability and safety in critical applications, making them an ideal solution for engineers seeking reliable mechanical tubing for aerospace, automotive, and industrial piping projects.
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.38-0.43 |
| Manganese (Mn) | 0.75-1.00 |
| Phosphorus (P) | ≤0.035 |
| Sulfur (S) | ≤0.040 |
| Silicon (Si) | 0.15-0.35 |
| Chromium (Cr) | 0.80-1.10 |
| Molybdenum (Mo) | 0.15-0.25 |
| Property | Value |
|---|---|
| Tensile Strength, min (MPa) | 862 |
| Yield Strength, min (MPa) | 690 |
| Elongation, min (%) | 15 |
| Hardness, max (HBW) | 229 |
| Feature | ASTM A519 AISI 4140 | ASTM A519 4130 | ASTM A335 P11 |
|---|---|---|---|
| Material Type | Alloy Steel | Alloy Steel | Alloy Steel |
| Temperature Range | Moderate to High | Moderate to High | High (up to 540°C) |
| Notch Toughness | Good | Good | Good |
| Corrosion Resistance | Good (With coatings) | Good (With coatings) | Good (With coatings) |
| Applications | Gears, Shafts, Heavy Machinery | Aerospace, Automotive | Boilers, Refineries |
| Tensile Strength (MPa) | 655-862 | ~670 (Normalized) | 415 (min) |
| Yield Strength (MPa) | 415-690 | ~435 (Normalized) | 205 (min) |
| Key Advantage | Very high strength and hardness | High strength and toughness | High-temp creep resistance |
Exceptional tensile strength for high-stress applications.
Chromium and molybdenum enhance durability in harsh environments.
Uniform structure ensures reliability in high-pressure systems.
Ideal for aerospace, automotive, and heavy machinery.
Long lifespan reduces maintenance and replacement costs.
Customizable properties for specific mechanical needs.
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