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ISO 5952:2019 specifies requirements for hot-rolled steel sheet of structural quality with improved atmospheric corrosion resistance, also known as weather-resistant structural steel. The standard covers steel intended for structures where mechanical properties and increased resistance to atmospheric corrosion are required. The current ISO 5952:2019 edition was reviewed and confirmed in 2024. Ladhani Metal Corporation is a manufacturer, supplier, and exporter of ISO 5952 Hot-Rolled Steel Sheet – Weathering Steel, available in required grades, classes, thicknesses, widths, lengths, coils, and cut-to-size sheets. Products can be supplied with mill test certificates and strict quality inspection as per international standards. Forms of Supply • Hot-Rolled Steel Sheets | Weathering Steel Sheets | Atmospheric Corrosion Resistant Sheets | Structural Steel Sheets | Hot-Rolled Coils | Cut-to-Length Sheets | Descaled Sheets | Pickled Sheets | Oiled Sheets | Custom Cut Sheets Available Grades HSA 235W | HSA 245W | HSA 355W1 | HSA 355W2 | HSA 365W Classes • Class A – Suitable for moderate loading conditions • Class B – Intended for welded structures and structural parts subjected to normal loading conditions • Class C – Intended where some resistance to brittle fracture is required • Class D – Intended where high resistance to brittle fracture is required ISO 5952:2019 identifies HSA 235W, HSA 245W, HSA 355W1, HSA 355W2 and HSA 365W, with the applicable classes specified in the standard. Chemical Composition – Example Grade HSA 355W1 • Carbon (C): Max. 0.12% • Manganese (Mn): Max. 1.00% • Silicon (Si): 0.20–0.75% • Phosphorus (P): Max. 0.035% • Sulfur (S): Max. 0.035% • Copper (Cu): 0.25–0.55% • Nickel (Ni): Max. 0.65% • Chromium (Cr): 0.30–1.25% The standard also permits microalloying elements such as vanadium, titanium and niobium, with the combined content of Mo, Nb, Ti, V and Zr limited to 0.15% where applicable. Mechanical Properties • HSA 235W: Yield strength min. 235 MPa | Tensile strength 360–510 MPa • HSA 245W: Yield strength min. 245 MPa | Tensile strength 400–540 MPa • HSA 355W1: Yield strength min. 355 MPa | Tensile strength 510–680 MPa • HSA 355W2: Yield strength min. 355 MPa | Tensile strength 510–680 MPa • HSA 365W: Yield strength min. 365 MPa | Tensile strength 490–610 MPa Elongation requirements vary according to grade, class, and sheet thickness. Dimensions and Thickness ISO 5952:2019 products are commonly supplied in thicknesses from 1.6 mm up to and including 12.5 mm and widths of 600 mm and over. They may be supplied in coils or cut lengths. Hot-rolled sheet below 600 mm wide may be slit from wider sheet and is still considered sheet. Surface Conditions • Hot-Rolled Surface • Descaled Surface • Pickled Surface • Oiled Surface • Unoiled Surface Hot-rolled material normally has oxide or scale from the rolling process. Scale can be removed by pickling or mechanical methods such as grit blasting. Descaled sheet may also be supplied with oil to help prevent rusting. Key Features • Improved atmospheric corrosion resistance • Weather-resistant steel characteristics • Good structural strength • Suitable for welded structures • Good weldability with appropriate welding conditions • High resistance to atmospheric exposure • Good dimensional consistency • Available in different strength levels • Suitable for bolted, riveted and welded structures • Available in coils and cut lengths Material Characteristics ISO 5952 weathering steel achieves improved atmospheric corrosion resistance through the intentional addition of alloying elements such as copper, chromium, nickel and phosphorus. These elements promote the formation of a protective oxide layer on the steel surface. The actual corrosion performance also depends on factors such as the surrounding atmosphere and structural design. Applications • Bridges • Structural Frameworks • Industrial Structures • Outdoor Structural Components • Railway Structures • Transportation Infrastructure • Buildings and Architectural Structures • Storage Structures • Welded Structural Components • Bolted Structures • Riveted Structures • General Engineering Structures ISO 5952 specifically identifies bolted, riveted and welded structures as intended uses for the covered weather-resistant structural steel sheets. Conclusion ISO 5952 Hot-Rolled Steel Sheet – Weathering Steel provides structural steel with improved atmospheric corrosion resistance along with specified mechanical properties. The grades HSA 235W, HSA 245W, HSA 355W1, HSA 355W2 and HSA 365W are available in different classes and dimensions to meet structural and engineering requirements. To place an order or make an enquiry for ISO 5952 Hot-Rolled Steel Sheet – Weathering Steel, contact Ladhani Metal Corporation for your required grade, class, thickness, width, length, surface condition and quantity.

ISO 4957:2018 specifies requirements for wrought tool steels covering non-alloy cold-work tool steels, alloy cold-work tool steels, alloy hot-work tool steels, and high-speed tool steels. The standard applies to products such as hot-rolled, forged, cold-drawn, cold-rolled and powder-metallurgy products supplied in specified surface and heat-treatment conditions. ISO confirms the 2018 edition as the current edition, reviewed and confirmed in 2023. Ladhani Metal Corporation is a manufacturer, supplier, and exporter of ISO 4957 Tool Steels, available in different grades, sizes, forms, surface conditions, and heat-treatment conditions. Products can be supplied with mill test certificates and strict quality inspection as per international standards. Forms of Supply • Tool Steel Bars | Round Bars | Flat Bars | Square Bars | Hexagonal Bars | Tool Steel Plates | Tool Steel Sheets | Forgings | Cold Drawn Bars | Hot Rolled Bars | Ground Bars | Precision Ground Bars | Tool Steel Strips Available Grades 105V | 50WCrV8 | 60WCrV8 | 102Cr6 | 21MnCr5 | 70MnMoCr8 | 90MnCrV8 | 95MnWCr5 | X100CrMoV5 | X153CrMoV12 | X210Cr12 | X210CrW12 | 35CrMo7 | 40CrMnNiMo8-6-4g | 45NiCrMo16 | 55NiCrMoV7 | 32CrMoV12-28 | X37CrMoV5-1 | X38CrMoV5-3 | X40CrMoV5-1 | 50CrMoV13-15 | X30WCrV9-3 | X35CrWMoV5 | 38CrCoWV18-17-17 The ISO 4957:2018 tables classify tool steels according to cold-work, hot-work and high-speed tool-steel groups. The grades supplied under the standard include alloy cold-work and hot-work grades such as 105V, 50WCrV8, 60WCrV8, 102Cr6, 21MnCr5, 70MnMoCr8 and 90MnCrV8. Steel Types • Alloy Cold-Work Tool Steels | 105V | 50WCrV8 | 60WCrV8 | 102Cr6 | 21MnCr5 | 70MnMoCr8 | 90MnCrV8 | 95MnWCr5 | X100CrMoV5 | X153CrMoV12 | X210Cr12 | X210CrW12 • Alloy Tool Steels for Toughness and Strength | 35CrMo7 | 40CrMnNiMo8-6-4g | 45NiCrMo16 | 55NiCrMoV7 | 32CrMoV12-28 • Hot-Work Tool Steels | X37CrMoV5-1 | X38CrMoV5-3 | X40CrMoV5-1 | 50CrMoV13-15 | X30WCrV9-3 | X35CrWMoV5 | 38CrCoWV18-17-17 Chemical Composition – Example Grade X153CrMoV12 • Carbon (C): 1.45–1.70% • Silicon (Si): Max. 0.40% • Manganese (Mn): Max. 0.40% • Chromium (Cr): 11.00–12.50% • Molybdenum (Mo): 0.70–1.00% • Vanadium (V): 0.70–1.00% • Phosphorus (P): Max. 0.030% • Sulfur (S): Max. 0.030% X153CrMoV12 is an alloy cold-work tool steel characterized by high carbon and chromium content with molybdenum and vanadium additions, providing high hardness and wear resistance after suitable heat treatment. ISO 4957 includes this grade among its alloy cold-work tool steels. Mechanical Properties • High hardness after hardening and tempering • Excellent wear resistance • Good dimensional stability • High compressive strength • Good toughness depending on grade • Good resistance to deformation • High resistance to abrasion • Suitable for demanding tooling conditions The ISO 4957 standard provides reference values for annealed hardness, austenitizing temperature, tempering temperature and hardness in the hardened and tempered condition for the specified grades. Key Features • High hardness • Excellent wear resistance • High strength • Good toughness • Excellent dimensional stability • Good machinability in annealed condition • High resistance to abrasion • Suitable for precision tooling • Good heat-treatment response • Available in different grades and forms • Suitable for demanding tooling operations Material Characteristics ISO 4957 Tool Steels are selected according to the required combination of hardness, wear resistance, toughness, strength, dimensional stability and hot-temperature performance. Alloying elements such as chromium, molybdenum, vanadium, tungsten and nickel provide different combinations of wear resistance, hardenability, toughness and resistance to thermal effects. Applications • Dies • Punches • Cutting Tools • Blanking Tools • Forming Tools • Stamping Tools • Press Tools • Moulds • Shear Blades • Industrial Knives • Rollers • Gauges • Jigs and Fixtures • Hot-Working Dies • Forging Dies • Extrusion Tooling • Plastic Moulding Tools • Precision Engineering Tools Conclusion ISO 4957 Tool Steels provide a wide range of alloy and high-performance steels for cold-work, hot-work and other demanding tooling requirements. The available grades offer different combinations of hardness, wear resistance, toughness, strength and dimensional stability, allowing the appropriate grade to be selected according to tooling requirements. To place an order or make an enquiry for ISO 4957 Tool Steels, contact Ladhani Metal Corporation for your required grade, size, form, surface condition, heat-treatment condition and quantity. #ISO4957 #ISO4957ToolSteels #ISO4957Steel #ISO4957ToolSteel #ToolSteels #ToolSteel #ToolSteelBars #ToolSteelSupplier #ToolSteelManufacturer #ToolSteelExporter #ColdWorkToolSteel #HotWorkToolSteel #HighSpeedToolSteel #AlloyToolSteel #CarbonToolSteel #DieSteel #MouldSteel #PrecisionToolSteel #ToolSteelBarsSupplier

EN 10305-3 specifies technical delivery conditions for welded cold sized steel tubes used for precision applications. The tubes are characterized by closely controlled dimensional tolerances and specified surface quality. The standard covers circular tubes and, in its newer edition, also square and rectangular sections for precision applications. Ladhani Metal Corporation is a manufacturer, supplier, and exporter of EN 10305-3 Welded Cold Sized Steel Tubes, available in different grades, sizes, wall thicknesses, lengths, and delivery conditions. Tubes can be supplied with mill test certificates and strict quality inspection as per international standards. Forms of Supply • Welded Cold Sized Tubes | Precision Steel Tubes | Cold Sized Tubes | ERW Precision Tubes | Mechanical Tubes | Automotive Tubes | Hydraulic Tubes | Pneumatic Tubes | Round Tubes | Square Tubes | Rectangular Tubes | Cut-to-Length Tubes Available Grades E155 | E190 | E195 | E220 | E235 | E260 | E275 Steel Types • Low-Strength Precision Steel | E155 | E190 | E195 | E220 • Medium-Strength Precision Steel | E235 | E260 | E275 Chemical Composition – Example Grade E355 • Carbon (C): Max. 0.22% • Silicon (Si): Max. 0.55% • Manganese (Mn): Max. 1.60% • Phosphorus (P): Max. 0.025% • Sulfur (S): Max. 0.025% • Aluminium (Al): Min. 0.020% These are the cast-analysis limits listed for E355 in EN 10305-3. Mechanical Properties • E155: Tensile strength 270–410 MPa | Minimum yield strength 155 MPa | Minimum elongation 28% • E195: Tensile strength 300–440 MPa | Minimum yield strength 195 MPa | Minimum elongation 28% • E235: Tensile strength 340–480 MPa | Minimum yield strength 235 MPa | Minimum elongation 25% • E275: Tensile strength 410–550 MPa | Minimum yield strength 275 MPa | Minimum elongation 22% The listed mechanical values apply to the specified delivery condition and can vary with grade, tube dimensions, and delivery condition. Delivery Conditions • +CR1 – Cold Rolled / Cold Sized Condition • +A – Annealed Condition • +N – Normalized Condition The mechanical properties are specified according to the applicable delivery condition. Key Features • Welded construction • Cold sized finish • Excellent dimensional accuracy • Closely controlled tolerances • Controlled surface roughness • Good surface finish • Consistent wall thickness • Good concentricity • Reliable mechanical properties • Suitable for precision machining • Available in different steel grades • Suitable for automotive and engineering components Material Characteristics EN 10305-3 tubes combine welded tube production with cold sizing to achieve precise dimensions and controlled surface quality. Cold sizing improves dimensional consistency and allows tubes to be supplied for applications where accurate outside dimensions, wall thickness, and surface condition are important. Applications • Automotive Components • Vehicle Components • Mechanical Engineering • General Engineering • Furniture Components • Precision Machinery • Hydraulic Components • Pneumatic Components • Machine Parts • Precision Fabrication • Structural Machinery Components • Tubular Engineering Components The standard identifies vehicle, furniture, and general engineering among the typical application fields for these precision tubes. Conclusion EN 10305-3 Welded Cold Sized Steel Tubes provide precision-engineered solutions requiring accurate dimensions, controlled tolerances, and specified surface quality. The range includes conventional E-series precision steels along with higher-strength and advanced steel grades for demanding engineering requirements. To place an order or make an enquiry for EN 10305-3 Welded Cold Sized Steel Tubes, contact Ladhani Metal Corporation for your required grade, size, wall thickness, length, and delivery condition. #EN10305.3 #EN10305.3SteelTubes #EN10305.3Tubes #EN10305.3WeldedTubes #EN10305.3PrecisionTubes #EN10305.3SteelTubeSupplier #EN10305.3SteelTubeManufacturer #EN10305.3SteelTubeExporter #WeldedPrecisionTubes #PrecisionSteelTubes #ColdSizedSteelTubes #ColdFinishedTubes #WeldedSteelTubes #MechanicalTubes #EngineeringSteelTubes #CarbonSteelTubes #PrecisionTubes #AutomotiveSteelTubes #HydraulicTubes #PneumaticTubes #MachineTubes #IndustrialSteelTubes #SteelTubeSupplier #SteelTubeManufacturer #SteelTubeExporter #PrecisionTubeSupplier #EuropeanSteelStandard #ENSteelStandard #Mumbai #Delhi #Chennai #Kolkata #Bengaluru #Hyderabad #Ahmedabad #Pune #Surat #Jaipur #Lucknow #Kanpur #Nagpur #Indore #Srinagar #Aurangabad #Dhanbad #Amritsar #NaviMumbai #Allahabad