AISI 4140 Seamless Tubing Medium Carbon Alloy Steel Seamless Pipe For Mechanical
AISI 4140 Seamless Tubing: Medium Carbon Alloy Steel Seamless Pipe
Overview
AISI 4140 seamless tubing is praised for its incredible strength, durability, and versatility. As a medium carbon alloy steel, it is designed to handle high-load applications, making it a preferred choice in industries ranging from automotive to oil and gas. Below is an in-depth look at its material specifications, key features, and relevant applications.
Material Specification
AISI 4140 is a chromium-molybdenum alloy steel featuring good hardness, strength, and wear resistance. It combines a balance of toughness with superior mechanical properties, making it suitable for a variety of demanding mechanical applications.
Key Features
- High Strength and Toughness: Offers excellent tensile strength and toughness, even at elevated temperatures.
- Wear Resistance: The chemistry balance enhances wear resistance, essential for prolonged exposure to mechanical stress.
- Versatility: Suitable for a wide range of applications such as shafts, gears, and components subjected to stress.
- Heat Treatability: Features good response to heat treatment, allowing for significant hardening.
- Corrosion Resistance: While not stainless, its chromium content provides some resistance to moisture and corrosion.
Chemical Composition
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.38 - 0.43 |
| Manganese (Mn) | 0.75 - 1.00 |
| Silicon (Si) | 0.15 - 0.30 |
| Chromium (Cr) | 0.80 - 1.10 |
| Molybdenum (Mo) | 0.15 - 0.25 |
| Phosphorus (P) | ≤ 0.035 |
| Sulfur (S) | ≤ 0.040 |
Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength | 950 MPa (approximate) |
| Yield Strength | 620 MPa (approximate) |
| Elongation (% in 50mm) | ≥ 20% |
| Reduction of Area | ≥ 55% |
| Hardness (Brinell) | 197 - 255 HB |
Similar Standards and Steel Grades
- ASTM: ASTM A29, ASTM A519
- EN: EN 10083-3, 42CrMo4
- GOST: 40X
- JIS: SCM440
- GB: 42CrMo
Applications
AISI 4140 seamless tubing is utilized in diverse applications, particularly in industries valuing the characteristics of an alloy boasting both strength and toughness:
- Automotive Industry: Used in the production of crankshafts, steering knuckles, and axles.
- Oil and Gas: Essential for drill collars, tool joints, and wellhead components due to its strength and wear resistance.
- Industrial Machinery: Components like gears and heavy-duty shafts benefit from its mechanical properties.
- Tool Manufacturing: Apt for making dies and molds requiring sturdiness and dependability.
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