ISO 683-11 Carbon Steel Bars are case hardening (carburizing) non-alloy steels designed for components requiring a hard, wear-resistant surface with a tough and ductile core after carburizing and heat treatment. These steels are widely used in automotive and engineering applications where surface hardness and core strength are essential. Manufactured in accordance with ISO 683-11, this specification defines the technical delivery conditions, chemical composition, and mechanical properties for non-alloy case hardening steels supplied in the form of bars, rods, and other semi-finished products. Ladhani Metal Corporation is a trusted manufacturer, supplier, and exporter of ISO 683-11 Carbon Steel Bars, supplied with mill test certificates and strict quality inspection as per international standards. Forms of Supply (as per specification): Hot rolled round bars, Black bars, Bright bars, Cold drawn bars, Peeled bars, Turned bars, Ground bars, Forged round bars Available Grades (as per ISO 683-11): C10, C15E4, C15E M2 (2a), C16E4, C16E M2 (3a), 20Cr4 (4), 20CrS4, 16MnCr5 (5), 16MnCrS5 (5a), 20MnCr5 (6), 20MnCrS5, 18CrMo4 (7), 18CrMoS4 (7a), 15NiCr13 (11), 20NiCrMo2 (12), 20NiCrMoS2 (12a), 17NiCrMo6 (13), 18CrNiMo7 (14) Explanation of Designation: • C – Carbon steel • Number – Approximate carbon content multiplied by 100 • Alloying elements (Cr, Mn, Ni, Mo) indicate alloy steel variants for improved hardenability • E – Special quality steel with controlled phosphorus and sulphur • S – Free machining variant with higher sulphur • Numbers in brackets – Reference to standard grade grouping Typical Chemical Composition (varies by grade): • Carbon (C): 0.10 – 0.25 depending on grade • Manganese (Mn): Improves strength and hardenability • Chromium (Cr), Nickel (Ni), Molybdenum (Mo): Present in alloy grades for enhanced performance • Silicon (Si): Used as deoxidizer • Phosphorus (P): ≤ 0.025 • Sulphur (S): ≤ 0.035 (higher in S grades) Mechanical Properties (Core, typical normalized condition): • Tensile Strength: 350 – 700 MPa (depending on grade) • Yield Strength: ≥ 220 MPa • Elongation: ≥ 20% • Hardness (Core): 110 – 200 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 • Wide range of carbon and alloy case hardening grades • Good machinability in annealed condition • Tough and ductile core after heat treatment • Uniform case hardening characteristics Material Characteristics: ISO 683-11 steel bars include both plain carbon and low alloy case hardening steels. These materials are designed to develop a hard outer layer while maintaining a tough inner core, ensuring wear resistance combined with impact strength and durability. Applications: • Gears and pinions • Shafts and spindles • Automotive transmission components • Bushings and pins • Couplings and mechanical parts • Heavy-duty engineering components Conclusion: Ladhani Metal Corporation supplies high-quality ISO 683-11 Carbon Steel Bars in a wide range of grades, sizes, and finishes. With excellent carburizing properties and enhanced mechanical performance, these steels are widely used in automotive and industrial engineering sectors. For stock availability, customized sizes, or technical specifications, contact Ladhani Metal Corporation. #ISO68311 #ISO68311Steel #CaseHardeningSteel #CaseHardeningSteelBars #AlloySteelBars #EngineeringSteel #CarburizingSteel #SurfaceHardeningSteel #IndustrialSteelBars #SteelBarsSupplier #AlloySteelSupplier #SteelManufacturer #SteelExporter #SteelStockist #SteelIndia #ENSteelGrades #16MnCr5 #20MnCr5 #18CrNiMo7 #17CrNiMo6 #GearSteel #AutomotiveSteel #ForgingSteel #MachiningSteel #HighStrengthSteel #HeatTreatableSteel #QuenchedAndTemperedSteel #SteelRoundBar #SteelFlatBar #SteelSquareBar #SteelHexBar #BrightBars #HotRolledBars #ColdDrawnBars #AnnealedSteel #NormalizedSteel #HeavyEngineering #ConstructionSteel #IndustrialMaterials #MetalIndustry #PrecisionEngineering #MechanicalComponents #SteelGrades #AlloySteelRoundBar #SteelApplications #EngineeringMaterials #SteelProducts #SteelSupply #GlobalSteel #SteelBusiness#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