ASTM A519 4130 Chromoly Tubing 4130 Steel Tube
Material, Specification, and Key Features
Substance: ASTM A519 4130 Chromoly Tubing
Steel Grade: 4130 Steel
Tube Type: Seamless
Specification: ASTM A519
Key Features: High strength, good machinability, excellent weldability, and attractive toughness.
Chemical Composition
| Element | Composition (%) |
| Carbon (C) | 0.28 - 0.33 |
| Manganese (Mn) | 0.40 - 0.60 |
| Phosphorus (P) | 0.040 (Max) |
| Sulfur (S) | 0.040 (Max) |
| Silicon (Si) | 0.15 - 0.35 |
| Chromium (Cr) | 0.80 - 1.10 |
| Molybdenum (Mo) | 0.15 - 0.25 |
Mechanical Properties
| Property | Value |
| Tensile Strength | 860 MPa (Min) |
| Yield Strength | 690 MPa (Min) |
| Elongation | 20% (Min) |
| Hardness | 217 HB (Max) |
| Impact Toughness | 27 J (Min) |
| Young's Modulus | 205 GPa |
Application
The ASTM A519 4130 Chromoly Tubing is widely used in various industries due to its exceptional properties. It finds applications in:
Automotive industry: Components such as axle shafts, steering housings, and suspension components.
Aerospace industry: Aircraft parts, including structural tubing, fittings, and hydraulic lines.
Oil and gas industry: Drill collars, downhole tools, and pipelines.
Bicycle manufacturing: Frames, forks, and other high-performance bicycle components.
Construction: Structural support components requiring high strength and durability.
Possible Alternative Grades
While ASTM A519 4130 Chromoly Tubing is a widely used material, there are alternative grades that can be considered for certain applications. Some possible alternatives are:
ASTM A519 4140: Similar to 4130 steel but with slightly higher carbon and chromium content, providing enhanced hardenability and wear resistance.
AISI 4340: A nickel-chromium-molybdenum alloy steel with excellent toughness, strength, and high-fatigue resistance.
ASTM A4130: A fine-grain low-alloy steel with improved weldability and excellent strength-to-weight ratio.
AISI 1010: A low-carbon steel offering good machinability and weldability, often used in applications where strength is less critical.
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