EN 10084 20NiCrMoS6-4 is a high-performance nickel-chromium-molybdenum alloy carburizing steel with controlled sulphur content, designed for components requiring a very hard, wear-resistant surface combined with a tough and high-strength core after carburizing and heat treatment. With approximately 0.20% carbon and higher alloy content, this grade offers excellent hardenability, deep case hardening capability, superior fatigue strength, and improved machinability due to sulphur addition. Manufactured in accordance with EN 10084, which specifies technical delivery conditions for steels intended for carburizing treatment, 20NiCrMoS6-4 steel is widely used in automotive, heavy-duty gearbox manufacturing, and critical engineering applications. Nickel enhances core toughness and impact resistance, chromium improves wear resistance and case depth, molybdenum increases hardenability and tempering resistance, while sulphur ensures efficient machining before heat treatment. Ladhani Metal Corporation is a trusted manufacturer, supplier, and exporter of EN 10084 20NiCrMoS6-4 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 (20NiCrMoS6-4): • 20 – Approx. 0.20% carbon content • Ni – Nickel alloyed steel • Cr – Chromium alloyed steel • Mo – Molybdenum alloyed steel • S – Increased sulphur content for improved machinability • 6-4 – Alloy content classification (nickel/chromium and molybdenum levels) Chemical Composition (% – typical limits): • Carbon (C): 0.17 – 0.23 • Manganese (Mn): 0.50 – 0.80 • Silicon (Si): ≤ 0.40 • Nickel (Ni): 1.40 – 1.70 • Chromium (Cr): 1.50 – 1.80 • Molybdenum (Mo): 0.25 – 0.35 • Phosphorus (P): ≤ 0.025 • Sulphur (S): 0.020 – 0.040 Mechanical Properties (Core, typical normalized condition): • Tensile Strength: 1000 – 1200 MPa • Yield Strength: ≥ 750 MPa • Elongation: ≥ 8% • Hardness (Core): 300 – 360 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 deep case hardening capability • Improved machinability due to controlled sulphur content • Superior hardenability from nickel, chromium, and molybdenum • High fatigue strength under heavy cyclic loads • Enhanced resistance to tempering and softening Material Characteristics: EN 10084 20NiCrMoS6-4 round bars combine deep carburizing response with strong core strength and improved machining efficiency. The higher alloy content ensures consistent case depth and superior wear resistance, while sulphur supports precision machining prior to heat treatment. Applications: • Heavy-duty gears and gear shafts • Automotive transmission and differential components • Industrial gearbox parts • High-load drive shafts • Pinions and precision machined components • Case hardened parts subjected to severe dynamic stresses Conclusion: Ladhani Metal Corporation supplies high-quality EN 10084 20NiCrMoS6-4 round bars in various diameters and finishes. With excellent hardenability, deep case hardening properties, improved machinability, and superior mechanical performance, 20NiCrMoS6-4 steel is widely preferred for demanding automotive and industrial 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