1. Key Properties
15NiMoB5 is a high-performance, low-alloy steel that is particularly designed for use in applications requiring high strength, excellent toughness, and good wear resistance at elevated temperatures. This steel is alloyed with nickel, molybdenum, and boron, which enhance its hardenability, strength, and overall performance under heavy load and thermal stress conditions. The round bar form ensures high precision, making it suitable for components that require tight tolerances and excellent surface finish.
The addition of boron gives this steel improved hardenability, while nickel and molybdenum contribute to its resistance to oxidation and corrosion, making it ideal for high-stress, high-temperature applications.
2. Applications/Industries
Power Generation (e.g., turbine shafts, valve components)
Oil & Gas (e.g., drill pipes, wellhead components)
Automotive (e.g., drive shafts, crankshafts)
Heavy Machinery (e.g., gears, rollers)
Chemical Industry (e.g., reactor parts, pumps)
Steel Industry (e.g., furnace components, heavy-duty shafts)
3. Certifications/Standards
Meets DIN 1.5415 specifications
ISO 9001 certified
4. Chemical Composition
Carbon (C): 0.10 - 0.20%
Silicon (Si):≤ 0.50%
Manganese (Mn): 0.60 - 1.30%
Phosphorus (P): ≤ 0.030%
Sulfur (S): ≤ 0.025%
Boron (B): ≥ 0.0005%
Chromium (Cr): 0.40 - 1.10%
Copper (Cu):≤ 0.30%
Molybdenum (Mo): 0.40 - 0.60%
Nickel (Ni): 0.70 - 1.00%
Vanadium (V): 0.03 - 0.08%
5. Technical Specifications
Yield Strength: 700–900 MPa (depending on heat treatment)
Tensile Strength: 950–1200 MPa
Hardness: 28–35 HRC (Rockwell Hardness) (depending on heat treatment)