The ASTM A519 4140 tubing is a seamless round steel pipe that has various applications, particularly in the oil, gas, and sewage transport industries. This article will provide an overview of the material, specification, key features, chemical composition, mechanical properties, steel grade, application, and possible alternative grades for ASTM A519 4140 tubing.
ASTM A519 4140 tubing is made from low alloy steel with a composition that primarily consists of chromium, manganese, and molybdenum. This tubing is produced using seamless manufacturing processes, ensuring its high strength and durability. The specification for ASTM A519 4140 tubing outlines the requirements for its chemical composition, mechanical properties, and dimensional tolerances.
ASTM A519 4140 tubing possesses several key features that make it suitable for various applications, including:
| Element | Composition Range |
|---|---|
| Carbon (C) | 0.38 - 0.43% |
| Manganese (Mn) | 0.75 - 1.00% |
| Phosphorus (P) | 0.035% (max) |
| Sulfur (S) | 0.040% (max) |
| Silicon (Si) | 0.15 - 0.35% |
| Chromium (Cr) | 0.80 - 1.10% |
| Molybdenum (Mo) | 0.15 - 0.25% |
| Property | Value |
|---|---|
| Tensile Strength (MPa) | 655 - 830 |
| Yield Strength (MPa) | 415 |
| Elongation (%) | 25 (min) |
| Hardness (HRC) | 22 (max) |
ASTM A519 4140 tubing falls under the category of low alloy steel and is commonly known as chrome-moly or chromoly steel. The "4140" designation refers to its composition of 0.40% carbon, along with significant amounts of chromium and molybdenum. These alloying elements contribute to its high strength and excellent toughness.
The ASTM A519 4140 tubing is widely used in various applications, including:
Although ASTM A519 4140 tubing is highly versatile and widely used, there are alternative grades that may suit specific applications. Some of these alternatives include ASTM A519 4130, ASTM A519 4340, and ASTM A519 1018. Each grade has its own unique combination of properties, allowing for tailored solutions based on specific requirements.
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