What is 4340 low alloy steel?
Chemical Composition
| % | Iron (Fe) | Nickel (Ni) | Chromium (Cr) | Manganese (Mn) | Carbon (C) | Silicon (Si) | Molybdenum (Mo) | Phosphorus (P) | Sulfur (S) |
|---|---|---|---|---|---|---|---|---|---|
| Minimum | 95.10 | 1.65 | 0.7 | 0.65 | 0.38 | 0.15 | 0.2 | – | – |
| Maximum | 96.27 | 2 | 0.9 | 0.9 | 0.43 | 0.35 | 0.3 | 0.010 | 0.010 |
Equivalent Grades
| USA | EU | Germany | Japan | France | England | Italy | China | Russia | Inter |
|---|---|---|---|---|---|---|---|---|---|
| 4340 | 34CrNiMo6 | 1.6582 | SNCM447 | 35NCD6 | 817M40 | 35CrNiMo6 | 40CrNiMo | 40KHN2MA | 36CrNiMo6 |
AISI 4340 alloy Steel Material Mechanical Properties
Hardness, Rockwell C: 22 HRc
Density: 7.85kg/m3
Tensile strength: 655 MPa .
Melting point: 1416°C
Thermal expansion: 12.2 µm/m°C (20-100 ºC)
Elastic modulus: 190-210 GPa (at 25 ºC ).
Why choose OTAI for 4340 steel supplier
At Otai, our commitment transcends being material handlers. Armed with proprietary technology and a dedication to continuous improvement, every order signifies our commitment to solving your challenges. We welcome your inquiries with open arms, ready to embark on a journey of precision and reliability together.
Elevate your projects with 4340 steel plate precision from Dongguan Otai Special Steel Co Ltd – where excellence is not just a promise but a practice.
Customer Stories
Recently, we received an inquiry from Loogle in Spain, seeking information on 4340 steel mechanical properties. After providing a detailed quote, Loogle expressed concerns about the authenticity of the material. At OTAI, we understand the importance of transparency and quality assurance.
In response, we promptly supplied Loogle with the comprehensive Material Test Certificate (MTC) for our 4340 standard steel, assuring him of its authenticity. We encouraged Robin to compare our MTC with alternatives in the market. Emphasizing the importance of not just competitive pricing but also the assurance of genuine quality.
