The ASTM A29 4140 steel tube is a hot rolled carbon alloy seamless steel pipe primarily used in the automotive industry. This article provides an overview of the material, its specifications, key features, chemical composition (presented in a table), mechanical properties (presented in a table), steel grade, applications, and possible alternative grades.
The ASTM A29 4140 steel tube is made from carbon alloy steel and is known for its excellent strength, toughness, and wear resistance. It is widely used in various automotive applications where high strength and durability are required.
The ASTM A29 4140 steel tube is available in seamless form and is typically manufactured according to the following specifications:
The key features of the ASTM A29 4140 steel tube include:
The chemical composition of ASTM A29 4140 steel tube is as follows:
| Element | Carbon (C) | Manganese (Mn) | Phosphorus (P) | Sulfur (S) | Silicon (Si) | Chromium (Cr) | Molybdenum (Mo) |
|---|---|---|---|---|---|---|---|
| Percentage | 0.38-0.43 | 0.75-1.00 | 0.035 (max) | 0.040 (max) | 0.15-0.35 | 0.80-1.10 | 0.15-0.25 |
The mechanical properties of ASTM A29 4140 steel tube are as follows:
| Property | Value |
|---|---|
| Tensile Strength | 95,000 - 105,000 psi |
| Yield Strength | 60,000 - 70,000 psi |
| Elongation | 25% (in 2 inches) |
| Reduction in Area | 50% |
| Hardness | 217 (Brinell), 95 (Rockwell C) |
The steel grade ASTM A29 4140 corresponds to the American standard designation for this steel pipe. It is a widely accepted grade for automotive applications, known for its high strength and durability.
The ASTM A29 4140 steel tube finds widespread application in the automotive industry, especially in the manufacturing of:
Its high strength and superior toughness make it suitable for such critical applications where reliability and performance are paramount.
While ASTM A29 4140 steel tube is commonly used, there are alternative grades available that may suit specific application requirements. Some possible alternative grades include:
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