Manufacturer of high-quality 350mm diameter 40Cr alloy steel round billets. Ideal for large shafts, gears, and critical machinery components. Request a quote today.
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Product details
Our 350mm diameter Round Billet is manufactured from premium 40Cr alloy steel (equivalent to AISI 5140), offering exceptional mechanical properties and reliability for the most demanding heavy-duty applications. This large-diameter billet combines chromium enhancement with precise manufacturing processes to deliver superior strength, toughness, and wear resistance. The 40Cr grade provides excellent hardenability and fatigue performance, making it perfect for critical components in mining equipment, heavy machinery, power generation, and large automotive systems where failure is not an option.
| Product Name | Alloy Steel Round Billet |
| Material Standard | GB/T 3077-2015 |
| Steel Grade | 40Cr |
| Equivalent Grades | AISI 5140, JIS SCr440, DIN 1.7035 |
| Shape | Round |
| Nominal Diameter | 350 mm |
| Diameter Tolerance | ± 3.5 mm |
| Standard Length | 3000mm, 6000mm |
| Length Tolerance | +100/-0 mm |
| Chemical Composition (GB/T 3077-2015) | |
|---|---|
| Element | Content (%) |
| Carbon (C) | 0.37 – 0.44 |
| Silicon (Si) | 0.17 – 0.37 |
| Manganese (Mn) | 0.50 – 0.80 |
| Chromium (Cr) | 0.80 – 1.10 |
| Phosphorus (P) | ≤ 0.035 |
| Sulfur (S) | ≤ 0.035 |
| Nickel (Ni) | ≤ 0.30 |
| Copper (Cu) | ≤ 0.30 |
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