EN24, also known as AISI 4340, is a high-strength alloy steel known for its toughness, high tensile strength, and fatigue resistance. It is widely used in demanding engineering applications where strength and wear resistance are critical. At Steelmet Industries, we supply EN24 steel bars in various forms such as bright bars, hot rolled bars, and custom-made profiles, manufactured to tight tolerances with full traceability.
📊 Chemical Composition of EN24 Steel
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.36 – 0.44 |
| Manganese (Mn) | 0.45 – 0.70 |
| Silicon (Si) | 0.10 – 0.35 |
| Chromium (Cr) | 0.90 – 1.40 |
| Nickel (Ni) | 1.30 – 1.70 |
| Molybdenum (Mo) | 0.20 – 0.35 |
| Sulphur (S) | ≤ 0.035 |
| Phosphorus (P) | ≤ 0.035 |
🧪 Mechanical Properties (Typical Values)
| Property | Value |
|---|---|
| Tensile Strength | 850–1000 MPa (can be increased by heat treatment) |
| Yield Strength | 680–800 MPa |
| Elongation | 13–16% |
| Hardness | 248–302 BHN |
| Toughness | Excellent (especially after oil quenching and tempering) |
Values may vary based on condition and heat treatment.
🔁 Equivalent Grades of EN24
| Standard | Equivalent Grade |
|---|---|
| AISI / SAE | 4340 |
| DIN / EN | 34CrNiMo6 |
| IS (India) | 40NiCrMo7 |
| JIS | SNCM439 |
| BS | 817M40 |
⚙️ Applications of EN24 Steel
EN24 is ideal for high-stress, high-strength, wear-resistant applications, such as:
Crankshafts and camshafts
Axles and shafts
Gears and gear shafts
Bolts and studs
Aircraft landing gear components
Heavy-duty machine parts
Automotive, aerospace, and defense components
High-performance agricultural and construction equipment
🔧 Machinability, Weldability & Heat Treatment
Machinability: Good in normalized or tempered condition.
Weldability: Fair — preheating and post-weld heat treatment are recommended.
Heat Treatment Options:
Normalizing: ~850°C
Hardening: Oil quench at 830–860°C
Tempering: 400–650°C based on mechanical requirements
Suitable for nitriding, case hardening, and flame/induction hardening
🧱 EN24 Steel Bars from Steelmet Industries
Steelmet Industries supplies EN24 bars in the following forms:
Bright Bars: Drawn, Peeled, Ground
Hot Rolled Bars: Rounds, Flats, Squares
Custom Profiles: Round-corner squares, special flats, hex bars, and other geometries
Available Sizes:
Rounds: 12 mm to 90 mm
Flats/Squares/Hex: As per customer specification
Tolerances: ISO H9, H10, or as required
Supply Condition: As rolled, annealed, normalized, tempered, or quenched and tempered
All bars are dimensionally accurate and surface finished to high standards.
🏭 Why Choose Steelmet Industries for EN24?
Wide experience in alloy steel manufacturing and supply
Availability in small lots or bulk quantities
Reliable and repeatable quality with full material traceability
VD (Vacuum Degassed) route available for critical engineering applications
Responsive customer service and technical support
NABL-certified testing support and material certificates
📜 Certifications & Compliance
Supplied with manufacturer’s Test Certificate (TC)
Conforms to IS, EN, SAE, DIN standards
Third-party inspections on request
NABL-certified chemical and mechanical test reports available
📞 Get in Touch
Looking for high-performance EN24 steel bars in India?
📞 Contact Steelmet Industries today for:
Enquiries and pricing
Custom profiles and machining
Ready stock availability
🔗 Visit our website: https://www.steelmet.in
📩 Or send your enquiry through the contact form.
