Seeking a steel that gives superior strength, toughness, and dependability under severe conditions? Alloy steel 4340 | 1.6511 | 36CrNiMo4 | EN24 is your go-to material for demanding engineering and aerospace applications, renowned worldwide for its high tensile strength, toughness, and exceptional fatigue resistance.
What Makes Alloy Steel EN24 Special?
This cast alloy steel integrates nickel, chromium, and molybdenum to obtain remarkable mechanical features.
Alloy steel 4340, EN 24, 1.6511, or 36CrNiMo4, will do the job that common steels can not.
Key Highlights:
- Higher toughness and ductility, reduction in the possibility of fractures when under heavy loads
- Remarkable hardness of alloy tool steels after heat treatment (up to 600 BHN)
- Stability under low: high temperatures
- High machinability and weldable with proper procedures
- Trusted as an aerospace-grade alloy for mission-critical components
This renders it a favorite among engineers and manufacturers who do not compromise safety or performance.
Applications of Alloy Steel EN24 – Power Meets Precision
Thanks to its blend of toughness and strength, Alloy steel 4340 | 1.6511 | 36CrNiMo4 | EN24 is widely chosen for:
- Landing gears, engine parts, and aerospace structural parts
- Chassis Automotive bush and bushing, crankshafts, connecting rods, drive shafts, heavy-duty
- Precision gears, spindles, bolts & fasteners requiring high tensile strength steel
- Oil & gas drilling equipment, subs, downhole equipment
- Fatigue resistance-High, wear resistance-High, commonly used in general engineering
Find out more about our machining services to learn how we can mould EN24 to your specifications.
Alloy Steel 4340 | 1.6511 | 36CrNiMo4 | EN24 Properties & Technical Specs
Mechanical & Physical Properties
| Property | Typical Value |
| Tensile Strength | Up to 1080 MPa (after Q&T) |
| Yield Strength | ~930 MPa |
| Hardness (after heat treatment) | 300-600 BHN |
| Elongation | ~13% |
| Impact Toughness | Excellent |
| Density | ~7.85 g/cm³ |
Heat Treatment & Hardness of Alloy Tool Steels
EN24 is extremely responsive to quenching and tempering. It can be treated to produce a range of mechanical properties, depending on its end hardness requirements, which makes it flexible to be used in a wider range of applications.
36CrNiMo4 vs 4340 Steel Comparison – Which Should You Use?
The question most of the engineers ask is: What is the difference between 36CrNiMo4 and 4340 steel?
- 36CrNiMo4 is a European Norm standard
- AISI/SAE (American standard) 4340
- They have almost identical chemistry and mechanical properties, but their impurity controls or micro-alloying procedures are somewhat varied.
- In reality, Alloy steel 4340 | EN24 | 1.6511 | 36CrNiMo4 are pooled to be used interchangeably, depending on the regional criteria or project requirement.
Why Choose Alloy Steel 4340 | 1.6511 | 36CrNiMo4 | EN24 From Us?
At MYT Machining, we don’t just supply steel – we deliver certified, aerospace-grade alloy with precise documentation and traceability.
By purchasing a product at our shop, you will obtain:
- Mill certifications & full material traceability
- Cut to size & heat-treated just the way you want it
- Aerospace and Defense Cluster Developed Aerospace/defense-related know-how in critical machining
- Short order lead times, international delivery services & good prices
Typical Use Cases for Alloy Steel 4340 | EN24
- Aerospace: landing gears, rotor shafts, aircraft bolts
- Oil & Gas: downhole equipment, drilling subs
- Motorsports & Racing: motor shafts, connecting rods
- Industrial gears and sprockets: Heavy Machinery
Need personalized recommendations? Please reach out to us to get your project needs related to precision Machining Services and others.
The Alloy Steel 4340 | EN24 As A Premium Part of Your Project Quality Contact Now
Don’t compromise on quality when it comes to critical applications. Get Alloy steel 4340 | 1.6511 from MYT Machining, and ensure your components stand the test of time and stress.
Send a Quick Quote or enable our specialists to tailor your order. Contact Us
FAQs
What is the typical hardness of alloy tool steels like 4340?
Alloy steel 4340 | EN24 after quenching and tempering provides 300-600 BHN, depending on the used heat treatment.
How does AISI 4340 alloy steel compare to 36CrNiMo4?
They are almost identical in both chemical and mechanical properties. The variation is primarily one of standard designation 36CrNiMo4 vs. 4340 steel, often being a matter of regional taste.
What industries rely most on alloy steel EN24?
Mostly aerospace, oil and gas, automotive, and heavy engineering, where fatigue and high tensile strength are important.
Can you machine EN24 to custom sizes?
Absolutely. Our Alloy steel 4340 | 1.6511 | EN24 is always precision machined, with close tolerances and to your drawings.
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