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HB 250 - 285 AISI 4340 Alloy Steel Fatigue Resistance With Fair Weldability
| MOQ: | 100KG |
| Price: | Price is negotiated based on the required specifications and quantity |
| Standard Packaging: | Standard export packaging, or packaging as required |
| Delivery Period: | 5-8 working days, depending on the parameters required for negotiation |
| Payment Method: | Payment Terms: Mainly T/T.. L/C, D/A, D/P, |
| Supply Capacity: | 5000 tons per month |
Detail Information
Place of Origin
China
Brand Name
AISI4340 Alloy
Certification
ISO Certificate
Model Number
AISI4340 Alloy
Name:
AISI 4340 Alloy Steel
Tensile Strength:
740-930 MPa (after Heat Treatment)
Yield Strength:
≥500 MPa
Elongation:
≥15%
Density:
7.85 G/cm³
Hardness:
HB 250-285 (as Annealed)
Weldability:
Fair
Ductility:
Good
Surface Finish:
Smooth
Applications:
Aerospace Components, Automotive Parts, Heavy Machinery, Oil And Gas Tools, Tooling
Highlight:
HB 250 AISI 4340 Alloy Steel
,HB 285 AISI 4340 Alloy Steel
,AISI 4340 Alloy Steel Fatigue Resistance
Product Description
HB 250 - 285 AISI 4340 Alloy Steel Fatigue Resistance With Fair Weldability
Product Specifications
| Attribute | Value |
|---|---|
| Name | AISI 4340 Alloy Steel |
| Tensile Strength | 740-930 MPa (after heat treatment) |
| Yield Strength | ≥500 MPa |
| Elongation | ≥15% |
| Density | 7.85 g/cm³ |
| Hardness | HB 250-285 (as annealed) |
| Weldability | Fair |
| Ductility | Good |
| Surface Finish | Smooth |
| Applications | Aerospace components, automotive parts, heavy machinery, oil and gas tools, tooling |
Product Overview
AISI 4340 Alloy is a high-performance, low-alloy steel renowned for its exceptional strength, toughness, and fatigue resistance. This material is commonly used in demanding applications where high mechanical properties and reliability are required, particularly in aerospace, automotive, and heavy machinery industries.
Chemical Composition
- Carbon (C): 0.38-0.43% - Provides high strength and hardness while maintaining good toughness
- Manganese (Mn): 0.60-0.80% - Enhances hardness and tensile strength
- Chromium (Cr): 0.70-0.90% - Increases corrosion resistance and wear resistance
- Nickel (Ni): 1.65-2.00% - Adds toughness and impact resistance
- Molybdenum (Mo): 0.20-0.30% - Enhances high-temperature strength
- Silicon (Si): 0.15-0.35% - Improves strength and mechanical properties
- Phosphorus (P): ≤0.035% - Maintains toughness and reduces brittleness
- Sulfur (S): ≤0.040% - Enhances machinability and strength
Mechanical Properties
- Tensile Strength: 740-930 MPa (after heat treatment)
- Yield Strength: ≥500 MPa
- Elongation: ≥15%
- Density: 7.85 g/cm³
- Hardness: HB 250-285 (as annealed)
- Impact Toughness: High resistance to dynamic loading
Heat Treatment Options
- Annealing: Improves machinability and ductility
- Normalizing: Refines grain structure for enhanced strength
- Quenching and Tempering: Increases hardness and strength
- Carburizing: Adds surface hardness while maintaining tough core
Industrial Applications
- Aerospace: Aircraft components, landing gear, fasteners
- Automotive: High-performance engine parts, crankshafts, camshafts
- Heavy Machinery: Gears, shafts, axles
- Oil & Gas: Downhole tools, drill collars
- Tooling: Dies, molds, cutting tools
Material Summary
AISI 4340 Alloy Steel combines exceptional strength, toughness, and fatigue resistance with good ductility and impact resistance. Its balanced chemical composition and versatile heat treatment options make it ideal for critical applications in aerospace, automotive, heavy machinery, oil and gas, and tooling industries.
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