Description
What is AISI 4140 Steel Plate
AISI 4140 Steel Plate is a medium carbon alloy steel known for its high strength, toughness, and wear resistance. It is often used in applications that require substantial strength and durability, making it a popular choice in various industries.
Key Specifications:
- Grade: AISI 4140
- Specifications: UNS G41400, ASTM A829, 1.7225, SCM440, 42CrMo4, EN19
- Dimensions:
-
- Width: 200 to 2000 mm
- Thickness: 6 to 800 mm
- Length: 2000 to 6000 mm
AISI 4140 Chemical Composition
| Element | Composition (%) |
| Carbon (C) | 0.38-0.43 |
| Manganese (Mn) | 0.75-1.00 |
| Phosphorus (P) | 0.04 max |
| Sulfur (S) | 0.04 max |
| Silicon (Si) | 0.15-0.40 |
| Chromium (Cr) | 0.80-1.10 |
| Molybdenum (Mo) | 0.15-0.25 |
AISI 4140 Mechanical Properties
| Property | Value |
| Yield Strength (ksi) | 60-80 |
| Tensile Strength (ksi) | 90-110 |
| Elongation (%) | 20-30 |
| Reduction of Area (%) | 50 min |
| Hardness (Brinell) | 207-285 |
| Hardness (Rockwell) | 28-34 HRC |
AISI 4140 Physical Properties
| Property | Value |
| Density | 7.85 g/cm³ (7850 kg/m³) |
| Elastic Modulus | 200 GPa |
| Poisson’s Ratio | 0.27-0.30 |
| Thermal Conductivity | 37 W/m-K |
| Melting Point | 1425-1540°C |
| Specific Heat Capacity | 486 J/kg-K |
Advantages:
- Heat Treatable: This can be hardened through heat treatment for enhanced strength and hardness.
- Good Toughness: Exhibits excellent impact resistance, making it suitable for heavy-duty applications.
- Versatile: Easily machinable and can be welded with proper techniques.
Applications:
- Machinery Components: Used in manufacturing gears, axles, and shafts that require high strength.
- Oil and Gas Industry: Common in drilling and production equipment due to its toughness and fatigue resistance.
- Automotive: Found in parts like crankshafts, suspension components, and high-stress applications.
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