-
Call Us On
+91 97695 84950
-
Mail Us @
[email protected]
Product Overview
Introduction To Engineering Steel 24 / 817M40 / AISI 4340 STEEL
MOKSH TUBES & FITTINGS LLP is a reliable manufacturer, supplier, and exporter of high quality EN24 steel products, including Round Bars, Forgings, Bright Bars, Hex Bars, Flats, Shafts, Hollow Bars, and Custom Components. EN36, also known as 817M40 or AISI 4340, is a high strength, alloy engineering steel 8 renowned for its excellent toughness, fatigue strength, and wear resistance. With high tensile strength and good ductility, EN24 is particularly suitable for heavy duty applications requiring high load bearing capacity.
EN 24, responds well to heat treatment and exhibits good machinability in its hardened and tempered condition, making it ideal for critical mechanical components. It is widely used in the automotive, aerospace, defense, and general engineering industries.
EN24 Alloy Steel Features:
- High tensile strength and fatigue resistance
- Excellent wear resistance and toughness
- Responds well to heat treatment
- Suitable for shafts, gears, bolts, automotive and aerospace components
Download Engineering Steels 24 Datasheet
Get the complete Engineering Steels 24 datasheet with chemical composition, mechanical properties, heat treatment details, and applications. Enter your email to receive the PDF instantly.
We respect your privacy. Your email will only be used to send the datasheet.
Engineering Steel EN24 Specifications
| Category | Details |
|---|---|
| Grade | EN 24 / 817M40 / AISI 4340 |
| Type | High-Strength Alloy Steel |
| Typical Chemical Composition | C 0.36–0.44%, Mn 0.60–0.90%, Si 0.15–0.35%, Cr 1.35–1.65%, Ni 1.90–2.20%, Mo 0.20–0.35%, P ≤ 0.035%, S ≤ 0.035% |
| Conditions | Annealed, Normalized, Hot Rolled, Forged, Quenched & Tempered |
| Heat Treatment | Quenching & Tempering, Stress Relieving, Case Hardening (optional) |
| Testing | Tensile, Hardness, Chemical, UT / NDT (on request) |
| Certification | EN 10204 3.1 / 3.2 |
Chemical Composition of EN24 / AISI 4340 Steel
| Element | Content (%) |
|---|---|
| Carbon (C) | 0.36 – 0.44 |
| Silicon (Si) | 0.10 – 0.35 |
| Manganese (Mn) | 0.45 – 0.70 |
| Chromium (Cr) | 0.90 – 1.40 |
| Nickel (Ni) | 1.30 – 1.80 |
| Molybdenum (Mo) | 0.20 – 0.35 |
| Sulfur (S) | ≤ 0.035 |
| Phosphorus (P) | ≤ 0.035 |
The balanced Ni–Cr–Mo alloying provides EN24 with exceptional strength, impact toughness, and deep hardenability.
Mechanical Properties of EN24 Steel
| Property | Annealed | Hot Finished | Cold Drawn | Hot Rolled |
|---|---|---|---|---|
| Tensile Strength (MPa) | 586–724 | 620–827 | 655–896 | 586–758 |
| Yield Strength (MPa) | 345–448 | 414–690 | 448–758 | 345–517 |
| Elongation (%) | 20–25 | 15–25 | 12–18 | 18–25 |
| Brinell Hardness (HB) | 150–200 | 180–250 | 200–270 | 150–210 |
| Rockwell Hardness | 80–90 B | 85–95 B | 20–30 C | 80–90 B |
In hardened & tempered condition, EN24 is suitable for heavily loaded, high-impact engineering applications.
Uses and Advantages
Excellent Corrosion Resistance in acids like hydrochloric, sulfuric, nitric, and organic acids
Good Strength and Toughness at room and elevated temperatures
Easily Weldable and Formable—supports complex fabrication
Low Reactivity with Process Media—ideal for sensitive applications
Non-toxic and Biocompatible—used in medical and high-purity chemical systems
Applications of Engineering Steel 24
Engineering Steel 24 (817M40 / AISI 4340) is ideal for applications demanding high strength, shock resistance, and fatigue performance:
Chemical Processing
Oil & Gas
Marine
Pharmaceutical
Heat Exchangers
Power Plants
WHY CHOOSE US?
FAQ – EN24 / 817M40 / AISI 4340 Steel
What is EN24 steel?
EN24 (AISI 4340 / 817M40) is a Ni-Cr-Mo high-strength alloy steel known for toughness, fatigue resistance, and hardenability.
What is EN24 used for?
Used for gears, shafts, axles, crankshafts, aerospace fittings, and high-strength mechanical components.
What hardness can EN24 achieve?
Typically 45–52 HRC after quenching & tempering.
Do you supply EN24 in bright bar & forged form?
Yes — EN24 is available in Bright Bars, HR Bars, Forged Bars, Flats, Hex Bars, Hollow Bars.
Do you provide MTCs?
Yes — all materials are supplied with EN 10204 3.1 / 3.2 Mill Test Certificates.
Contact Us
Get in touch with Moksh Tubes & Fittings LLP — Your Trusted Source for EN24 Alloy Steel Products
Get in TouchWhy Choose EN24 Engineering Steel?
EN24 is a high-strength nickel chromium molybdenum alloy steel designed for applications that demand exceptional toughness, wear resistance, and fatigue strength. It is widely used in industries where components operate under heavy loads, repeated stress, and high-impact conditions.
Compared to standard carbon steels, EN24 offers superior hardenability and mechanical performance after heat treatment. Its excellent strength-to-weight ratio and long service life make it a preferred choice for manufacturing critical components such as gears, shafts, axles, crankshafts, bolts, and heavy-duty machine parts.
Whether you are manufacturing industrial equipment, mining machinery, automotive components, or aerospace parts, EN24 delivers reliable performance even in demanding operating environments.