AISI 4130
AISI 4130 is a chromium-molybdenum (chromoly) low-alloy steel known for its high strength, toughness, and excellent weldability. It is widely used in applications requiring a balance of strength-to-weight ratio and resistance to fatigue.
Descriptions
1. Chemical Composition
AISI 4130 is alloyed with chromium and molybdenum to enhance hardenability, strength, and corrosion resistance. Its composition supports heat treatment for tailored mechanical properties.
| Element | Composition (% by Weight) | Role |
| Carbon (C) | 0.28-0.33 | Increases strength and hardness. |
| Manganese (Mn) | 0.40-0.60 | Improves hardenability and deoxidization. |
| Silicon (Si) | 0.15-0.35 | Enhances strength and deoxidizes molten steel. |
| Chromium (Cr) | 0.80-1.10 | Boosts hardenability and corrosion resistance. |
| Molybdenum (Mo) | 0.15-0.25 | Improves high-temperature strength and creep resistance. |
| Phosphorus (P) | 0.035 max | Residual element (impurity control). |
| Sulfur (S) | 0.040 max | Residual element (impurity control). |
| Iron (Fe) | Balance | Base metal. |
2. Mechanical Properties
AISI 4130 forgings achieve superior mechanical performance through heat treatment (e.g., quenching and tempering). Properties vary based on processing conditions.
| Property | As-Forged | Normalized &Tempered | Quenched &Tempered | Test Standard |
| Tensile Strength | 670-850 MPa | 760-930 MPa | 930-1080 MPa | ASTME8 |
| Yield Strength (0.2% offset) | 435-620 MPa | 620-760 MPa | 830-950MPa | ASTME8 |
| Elongation (%in 50 mm) | 15-20% | 18-22% | 12-18% | ASTME8 |
| Reduction of Area | 45-55% | 50-60% | 40-50% | ASTME8 |
| Hardness (Brinell) | 197-235 HB | 220-260HB | 285-341HB | ASTME10 |
| Impact Toughness (Charpy V) | 40-60J(room temp) | 50-70J | 30-50J | ASTME23 |
3. Key Advantages
High Strength-to-Weight Ratio: Ideal for weight-sensitive applications.
Heat Treatable: Customizable properties for specific loads.
Fatigue Resistance: Suitable for cyclic stress environments.
Weldability: Compatible with most welding techniques (with proper precautions).
4. Typical Product Names
Forged Flanges
Turbine Shafts
High-Strength Bolts
Connecting Rods
Pressure Vessel Components
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CONTACT US
Address
B-2007,Chuanmei Building,Taishan Street,Taian City，Shandong, China
Call Us
+86 0538 6368027
Email Address
Sales@tiptopforging.com
Applications
Landing gear components, engine mounts, structural brackets.
Drive shafts, suspension components, roll cages.
Drill collars, valve bodies, wellhead equipment.
Gears, hydraulic cylinders, heavy-duty fasteners.
