EN24, designated under BS970:1955, is a nickel-chromium-molybdenum alloy steel with exceptional mechanical properties. It offers a rare combination of high tensile strength, shock resistance, wear resistance, and good ductility. Rolled rounds of EN24 are ideal for high-stress applications such as shafts, gears, spindles, and automotive components.
At Steelmet Industries, we offer EN24 rolled round bars in a wide size range from 16mm to 150mm diameter, with options in as-rolled, annealed, or machinable condition, ready for further processing or heat treatment.
Key Characteristics of EN24 Rolled Rounds
Standard: BS970:1955
Grade: EN24
Composition: Ni 1.3–1.7%, Cr 0.9–1.4%, Mo 0.2–0.35%, C 0.36–0.44%
Condition Offered: As rolled, softened, or rough machined
Machinability: Good in softened or normalized condition
Heat Treatable: Yes – widely used in quenched & tempered condition
Corrosion Resistance: Better than carbon steels but not stainless
Applications of EN24 Rolled Round Bars
Due to its strength and toughness, EN24 rolled rounds are widely used in:
Automotive & Transportation: Crankshafts, propeller shafts, half shafts, axles
Mechanical Engineering: Gears, bolts, connecting rods, spindles, couplings
Construction Equipment: Rollers, pins, bushes
Tooling: Mandrels, collets, dies
Aerospace (non-critical parts): Landing gear components, actuators
EN24 in Different Conditions and Product Forms
At Steelmet Industries, we stock and supply:
Rolled Rounds: Dia 16mm to 150mm
Forged Bars: For sizes above 150mm
Bright Bars: Peeled, cold drawn, ground
Custom Lengths: Cut to specification
Variants Available:
EN24 Annealed – easier machining
EN24 N+T (Normalized & Tempered)
EN24 QT (Quenched & Tempered)
See also: EN24 Forged Rounds in Annealed Condition
Equivalent Steel Grades – EN24
| Standard | Equivalent Grade |
|---|---|
| BS (1955) | EN24 |
| BS (1991) | 817M40 |
| AISI / SAE | 4340 |
| ASTM | A29/A322 4340 |
| DIN | 34CrNiMo6 (1.6582) |
| ISO | 34CrNiMo6 |
| JIS | SNCM447 |
| GOST | 40KhN2MA |
| IS (India) | 40NiCrMo6 |
| GB (China) | 40CrNiMo |
Note: Equivalents are based on chemical composition. Exact match for mechanical properties requires consideration of heat treatment and processing routes.
For more, refer:
Why Choose Steelmet for EN24 Rolled Rounds?
✅ Size range: 16mm to 150mm in stock – quick delivery
⚙️ Customization: Cut lengths, chamfering, surface finishing on request
📄 Full traceability & documentation possible:
Mill Test Certificates (MTCs)
Third-party test reports
Lorry receipts & packing lists
Lab reports (NABL-certified)
🌍 Supplies across India and to export destinations
⏱️ Commitment to scheduled deliveries and long-term procurement planning
Our focus on quality, flexibility, and responsiveness has made Steelmet Industries a preferred source for reliable EN24 alloy steels.
Learn more about What We Do and our Quality Policy
Frequently Asked Questions about EN24 Rolled Rounds
Q1: Is EN24 good for hardening?
A: Yes. EN24 responds well to hardening via quenching and tempering, making it suitable for components under high stress or wear.
Q2: What’s the difference between EN24 and SAE 4340?
A: SAE 4340 is the American equivalent of EN24. Both offer similar strength and toughness, but availability and minor chemistry tweaks can differ.
Q3: Are EN24 rolled bars supplied in machinable condition?
A: Yes. We supply EN24 in annealed or normalized & tempered form, ready for machining or further heat treatment.
Q4: Do you offer lengths customized as per the customer’s needs?
A: Yes. We offer custom cut lengths and can also provide chamfered ends for ready-to-use material.
Q5: Are third-party inspections and reports available?
A: Absolutely. With prior arrangement, Steelmet can provide NABL lab tests, customer-nominated third-party inspection, and comprehensive dispatch documentation.
Get in Touch for EN24 Rolled Bars
📞 Call us at: 0712-2728071 (India) | +91-712-2728071 (Global)
💬 WhatsApp: +917122728071
📝 Submit an enquiry here: Contact & Enquiry Page
🌐 Visit our website: www.steelmet.in
Serving India and global markets with consistency, quality, and flexibility.
