Description
44NiCrMo3 Alloy Steel: Comprehensive Overview
44NiCrMo3 is a versatile alloy steel known for its exceptional mechanical properties and suitability for demanding engineering applications. This steel grade is widely used in industries where high strength, toughness, and durability are essential. Here, we delve into its composition, properties, heat treatment, and applications, along with a comparison table of various grades to highlight its position in the alloy steel family.
Chemical Composition
The composition of 44NiCrMo3 includes:
| Element | Range (%) |
|---|---|
| Carbon (C) | 0.38 – 0.43 |
| Manganese (Mn) | 0.50 – 0.80 |
| Silicon (Si) | 0.15 – 0.35 |
| Nickel (Ni) | 1.30 – 1.70 |
| Chromium (Cr) | 0.90 – 1.20 |
| Molybdenum (Mo) | 0.15 – 0.30 |
| Phosphorus (P) | ≤ 0.035 |
| Sulfur (S) | ≤ 0.035 |
Mechanical Properties
44NiCrMo3 offers a balance of strength and toughness, making it suitable for high-stress applications:
| Property | Value |
|---|---|
| Yield Strength (MPa) | 850 – 1000 |
| Tensile Strength (MPa) | 950 – 1150 |
| Elongation (%) | ≥ 10 |
| Hardness (Brinell) | 235 – 285 HB |
Heat Treatment
To achieve desired mechanical properties, 44NiCrMo3 undergoes several heat treatment processes:
- Annealing: Heating to 850-900°C and slow cooling to improve machinability and relieve stress.
- Hardening: Heating to 830-880°C followed by quenching in oil or water to increase hardness.
- Tempering: Reheating to 500-700°C after hardening to improve toughness and reduce brittleness.
Applications
44NiCrMo3 is used in various demanding applications due to its high strength and toughness:
- Automotive Industry: Gears, shafts, and crankshafts.
- Aerospace: Structural components and critical fasteners.
- Industrial Machinery: High-load gears, bearings, and tool components.
Comparison with Other Alloy Steel Grades
To provide a clearer context, here’s a comparison of 44NiCrMo3 with other similar alloy steel grades:
| Steel Grade | Carbon (C) | Chromium (Cr) | Nickel (Ni) | Molybdenum (Mo) | Typical Applications |
|---|---|---|---|---|---|
| 44NiCrMo3 | 0.38 – 0.43 | 0.90 – 1.20 | 1.30 – 1.70 | 0.15 – 0.30 | Automotive gears, aerospace components, industrial machinery |
| 42CrMo4 | 0.38 – 0.45 | 0.90 – 1.20 | 0.80 – 1.20 | 0.15 – 0.30 | Similar applications but slightly less nickel content |
| 4140 | 0.38 – 0.43 | 0.80 – 1.10 | 0.75 – 1.00 | 0.15 – 0.30 | General engineering applications, oil and gas industry |
| 4340 | 0.38 – 0.43 | 0.60 – 0.75 | 1.65 – 2.00 | 0.20 – 0.30 | Aerospace, automotive, high-stress applications |
Supply Cities:
Mumbai Ahmedabad, Amaravathi, Ambattur, Bangalore, Belgaum, Chennai, Chittoor, Coimbatore, Dindigul, Mysore, Nellore, Hyderabad, Kochi, Mangalore, Tirupur, Tuticorin, Madurai, Andhra Pradesh, Karnataka, Puducherry, Kerala, Tamil Nadu, Telangana, Visakhapatnam, Kochi, Kerala, Hubli-Dharwad, Karnataka, Ghaziabad Kolkata.
