SAE 4145 Alloy Steel Round Bar 10-350mm Diameter Hot Rolled ASTM A29 for Industrial Applications
High-strength chromium molybdenum steel with enhanced hardenability for demanding industrial applications. Available in diameters from 10mm to 350mm in hot rolled and cold rolled finishes.
| Parameter | Specification |
|---|---|
| Material Grade | SAE 4145 Alloy Steel |
| Diameter Range | 10 - 350 mm |
| Standard Length | 6 meters (custom cutting available) |
| Processing Type | Hot Rolled |
| Available Brands | BAOSTEEL, DELTA, DONGBEI, HUAXI, SHAGANG |
| Minimum Order Quantity | 1 Ton |
| Standard Compliance | ASTM A29, GB, EN, DIN |
Available in standard diameters: 10, 12, 15, 18, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95, 100, 105, 110, 120, 130, 140, 150, 160, 180, 200, 210, 220, 230, 250, 270, 300 mm
| Element | Content (%) |
|---|---|
| Iron (Fe) | 96.795 - 97.72 |
| Chromium (Cr) | 0.800 - 1.10 |
| Manganese (Mn) | 0.750 - 1.00 |
| Carbon (C) | 0.430 - 0.480 |
| Molybdenum (Mo) | 0.150 - 0.250 |
| Silicon (Si) | 0.150 - 0.300 |
| Sulfur (S) | ≤ 0.0400 |
| Phosphorous (P) | ≤ 0.0350 |
- Minimum Yield Strength: 89 KSI
- Ultimate Tensile Strength: 125-140 KSI
- Excellent toughness and fatigue resistance
- Enhanced hardenability for larger diameters
| Property | Metric | Imperial |
|---|---|---|
| Density | 7.85 g/cm³ | 0.284 lb/in³ |
| Melting Point | 1424°C | 2580°F |
| Thermal Conductivity | 42.6 W/mK | - |
Quenching and tempering at 927°C (1700°F) with water, oil, or air cooling to enhance mechanical properties.
Moderately difficult to machine requiring sharp cutting tools and cutting fluids to prevent overheating and extend tool life.
Suitable for welding applications with proper techniques, offering high-strength performance in challenging conditions.
- Oil and gas drilling tools and components
- Heavy-duty shafts and gears
- Aerospace and defense components
- Marine motor shafts and offshore equipment
- Construction and heavy machinery parts
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