EN 10084 18NiCr5-4 is a nickel-chromium alloy carburizing steel grade developed for components requiring a hard, wear-resistant surface with a strong and tough core after carburizing and heat treatment. With approximately 0.18% carbon along with nickel and chromium additions, this grade offers excellent hardenability, improved fatigue strength, and superior impact resistance, making it suitable for highly stressed mechanical components. Manufactured in accordance with EN 10084, which specifies technical delivery conditions for steels intended for carburizing treatment, 18NiCr5-4 steel is widely used in automotive, heavy engineering, and transmission industries. Nickel enhances core toughness and resistance to shock loading, while chromium improves wear resistance and depth of hardening, ensuring reliable mechanical performance after quenching and tempering. Ladhani Metal Corporation is a trusted manufacturer, supplier, and exporter of EN 10084 18NiCr5-4 round bars, supplied with mill test certificates and strict quality inspection as per European standards. Forms of Supply (as per grade): Hot rolled round bars, Black round bars, Bright round bars, Peeled bars, Turned bars, Ground bars, Forged round bars Explanation of Designation (18NiCr5-4): • 18 – Approx. 0.18% carbon content • Ni – Nickel alloyed steel • Cr – Chromium alloyed steel • 5-4 – Alloy content classification (nickel and chromium levels) Chemical Composition (% – typical limits): • Carbon (C): 0.16 – 0.21 • Manganese (Mn): 0.50 – 0.80 • Silicon (Si): ≤ 0.40 • Nickel (Ni): 1.00 – 1.40 • Chromium (Cr): 0.80 – 1.10 • Phosphorus (P): ≤ 0.025 • Sulphur (S): ≤ 0.035 Mechanical Properties (Core, typical normalized condition): • Tensile Strength: 850 – 1050 MPa • Yield Strength: ≥ 600 MPa • Elongation: ≥ 9% • Hardness (Core): 230 – 300 HB After carburizing and quenching, the surface hardness can reach approximately 58 – 62 HRC, depending on case depth and heat treatment conditions. Key Features: • Excellent carburizing response • Superior core toughness due to nickel content • Good hardenability and wear resistance • High fatigue strength under dynamic loads • Suitable for heavy-duty case hardened components Material Characteristics: EN 10084 18NiCr5-4 round bars combine deep case hardening capability with enhanced core strength and ductility. The higher nickel content improves impact resistance, while chromium ensures uniform hardness distribution and wear resistance after carburizing and quenching. Applications: • Heavy-duty gears and gear shafts • Transmission and differential components • Drive shafts and pinions • Automotive drivetrain parts • Industrial machinery components requiring case hardening • Components subjected to high cyclic stresses Conclusion: Ladhani Metal Corporation supplies high-quality EN 10084 18NiCr5-4 round bars in various diameters and finishes. With reliable hardenability, excellent fatigue resistance, and strong core toughness, 18NiCr5-4 steel is widely used in demanding automotive and engineering applications. For stock availability, customized sizes, or technical specifications, contact Ladhani Metal Corporation. #EN10084 #EN10084Steel #EN10084Bars #EN10084CarburizingSteel #EN10084CaseHardeningSteel #ENStandardSteel #AlloySteel #CaseHardeningSteel #CarburizingSteel #C10E #C15E #C16E #16MnCr5 #20MnCr5 #18CrNiMo76 #17Cr3 #20MnCrS5 #EngineeringSteelBars #AlloySteelBars #AlloySteelRods #RoundBar #FlatBar #SquareBar #HexBar #ForgingSteel #MachinerySteel #AutomotiveSteel #MechanicalSteel #GearSteel #PinionSteel #ShaftSteel #TransmissionSteel #HeatTreatableSteel #CaseHardenedSteel #SteelManufacturers #SteelSuppliers #SteelStockist #SteelExporter #IndianSteel #AlloySteelSupplier #EN10084Supplier #EN10084Manufacturer #EN10084Exporter #SteelBarsIndia #SteelRodsIndia #MetalIndustry #IndustrialSteel #EngineeringIndustry #HeavyEngineeringSteel #FabricationSteel #SteelTrading #SteelWholesale #LadhaniMetal #Mumbai #Delhi #Chennai #Kolkata #Bengaluru #Hyderabad #Ahmedabad #Pune #Surat #Jaipur #Lucknow #Kanpur #Nagpur #Indore #Thane #Bhopal #Visakhapatnam #Patna #Vadodara #Ghaziabad #Ludhiana #Coimbatore #Agra #Madurai #Nashik #Faridabad #Meerut #Rajkot #Varanasi #Srinagar #Aurangabad #Dhanbad #Amritsar #NaviMumbai #Allahabad #Ranchi #Howrah #Jabalpur #Gwalior #Vijayawada #Jodhpur #Raipur #Kota #Guwahati #Chandigarh #Solapur #Hubli #Mysuru #Tiruchirappalli #Bareilly