36CrNiMo4 1.6511 35NCD4 Structural Steel
(Available in Bars, Plates, Forgings & Custom Fabrications)
36CrNiMo4, also known as 1.6511 or 35NCD4, is a structural alloy steel with excellent high tensile strength that resists deformation and fracture even under extreme conditions. This steel grade has a high degree of heat and wear resistance, ensuring a long service life in any application. It is commonly used in applications that require high durability and durability, such as heavy machinery, automotive parts, and gearboxes.
In order to achieve the best performance of 36CrNiMo4, it is important to follow proper heat treatment procedures, including annealing, quenching and tempering, as well as ensuring proper machining and welding practices.
| Grade : | 36CrNiMo4 | ||
| Number: | 1.6511 | ||
| Classification: | Alloy special steel | ||
| Standard: |
|
2.Chemical Composition
| Grade | C | Si | Mn | P | S | Cr | Ni | Mo |
| 36CrNiMo4/1.6511 | 0.32-0.4 | ≤ 0.4 | 0.5-0.8 | ≤ 0.035 | ≤ 0.035 | 0.9-1.2 | 0.9-1.2 | 0.15-0.3 |
3.36crnimo4 equivalent material
A low-alloy quenched-and-tempered steel optimized for high-strength applications. Key chemical composition (%):
| Grade | C | Mn | P | S | Si | Ni | Cr | Mo |
| 4340 | 0.38-0.43 | 0.60-0.80 | 0.035 | 0.04 | 0.15-0.35 | 1.65-2.00 | 0.70-0.90 | 0.20-0.30 |
| EN24/817M40 | 0.36-0.44 | 0.45-0.70 | 0.035 | 0.04 | 0.1-0.40 | 1.3-1.7 | 1.00-1.40 | 0.20-0.35 |
| SNCM 439/SNCM8 | 0.36-0.43 | 0.60-0.90 | 0.03 | 0.03 | 0.15-0.35 | 1.60-2.00 | 0.60-1.00 | 0.15-0.30 |
4. Key Mechanical Properties & Advantages
|
Property |
Typical Value (Quenched & Tempered) |
Application Benefit |
|
Tensile Strength |
980–1180 MPa |
Ideal for components under extreme static/dynamic loads (e.g., bridges, gearboxes) |
|
Yield Strength |
≥835 MPa |
Resists permanent deformation in high-stress environments |
|
Impact Toughness (KV2) |
≥47 J @ 20°C |
Maintains ductility in cold climates (-40°C capable), reducing fracture risks |
|
Hardness (HB) |
280–340 HB |
Balances machinability with wear resistance for complex part production |
|
Hardenability (Jominy) |
Up to 50mm depth @ ≥50 HRC |
Ensures uniform hardness in thick sections (critical for large forgings) |
about us
We are a company specializing in steel supply, with many years of industry experience and quality supply chain resources. The company is committed to providing customers with high quality, stable value steel products.
We have an efficient and professional sales team, they have rich steel knowledge and skills, can provide customers with comprehensive steel solutions and high quality after-sales service.
Stocking Flexibility:
Standard Sizes: Bars (φ20–300mm), plates (10–150mm thickness), ready for immediate shipment.
Custom Solutions: Tailored dimensions (up to 600mm bar diameter, 300mm plate thickness) and shapes for large-scale projects.
FAQ:
What is EN24 material equivalent to?
EN24 Alloy structural steel properties are very similar with GB 40CrNiMo steel, JIS SNCM439, and DIN 1.6511 36CrNiMo4 Alloy structural steel. At most work environment, EN24 is equivalent to 40CrNiMo, 1.6511 36CrNiMo4, SNCM439, 4340 steel.
What is the material specification of AISI 4340?
AISI 4340 is generally supplied in hardened and tempered condition with the tensile range of 930 – 1080 Mpa ,hardness 280-320HB. Pre hardened and tempered 4340 can be further surface hardened by flame or induction hardening and by nitriding.
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