JIS G 3106 Rolled Steel Sheets for Welded Structure – MS / CS Steel – Detailed Overview

FOR REQUIREMENT OF THIS GRADE OR FOR DETAIL CONTACT US AT :-

www.ladhanimetal.com

www.ladhanimetal.in

ladhanimetal@gmail.com

Introduction

JIS G 3106 specifies hot-rolled steel products with excellent weldability for welded structures. The standard covers rolled steels used in bridges, ships, railway rolling stock, petroleum storage tanks, containers and other welded structures. The 2024 edition is the current valid edition and replaced JIS G 3106:2022.

Ladhani Metal Corporation supplies JIS G 3106 rolled steel sheets, plates and related hot-rolled products in various grades, dimensions and delivery conditions on an order basis.

Applicable Standard

JIS G 3106:2024 – Rolled steels for welded structure.

The 2024 edition was published on 20 February 2024 and is currently listed as valid by the Japanese Standards Association. It was prepared with reference to ISO 630-1:2021, ISO 630-2:2021 and ISO 630-3:2021, with technical modifications specific to JIS.

Material Type

JIS G 3106 steel can be supplied as:

·        Mild Steel (MS)

·        Carbon Steel (CS)

·        Welded Structural Steel

·        Hot-Rolled Structural Steel

·        High-Weldability Structural Steel

·        Structural Plate and Sheet Steel

The SM grades are designed particularly for welded structural applications where weldability, strength and structural reliability are important.

Scope

JIS G 3106 covers highly weldable hot-rolled steels and certain hot-extruded sections intended for welded structures.

Typical products and applications include:

·        Steel sheets and plates

·        Hot-rolled strips and coils

·        Structural sections

·        Flats

·        Welded structural components

·        Hot-extruded sections

The standard specifically covers applications such as bridges, ships, rolling stock, petroleum storage tanks and containers.

Chemical Composition

The chemical composition requirements vary according to grade and applicable thickness. The table below summarizes the principal JIS G 3106 composition limits for the major elements. For actual procurement, the applicable thickness-specific requirements of JIS G 3106:2024 should be confirmed.

*Carbon limits can vary with thickness. The complete JIS G 3106:2024 requirements also include weldability-related controls such as carbon equivalent and weld-crack sensitivity composition.

Mechanical Properties

JIS G 3106 defines yield strength or proof stress, tensile strength and elongation according to grade and product thickness. The minimum yield values therefore vary with thickness.

*Elongation depends on thickness and the specified tensile test piece. The values above are a compact representation of the thickness-dependent requirements.

Weldability

Weldability is one of the principal characteristics of JIS G 3106 steels. The standard includes requirements for:

·        General weldability

·        Carbon equivalent

·        Weld-crack sensitivity composition

·        Suitable chemical composition control

·        Charpy impact performance for specified grades

These requirements help control weldability and resistance to cracking during fabrication of welded structures.

Manufacturing Process

JIS G 3106 steel sheets and plates are generally produced through controlled hot-rolling processes.

The manufacturing process can include:

·        Steelmaking

·        Continuous casting or ingot casting

·        Slab preparation

·        Reheating

·        Controlled hot rolling

·        Controlled cooling

·        Straightening

·        Cutting to required dimensions

·        Surface conditioning

Manufacturing parameters are selected according to the required grade, thickness, mechanical properties and weldability requirements.

Manufacturing Conditions

JIS G 3106 products may be supplied according to the applicable grade and agreed manufacturing requirements.

Common conditions include:

·        Hot rolled

·        Controlled rolled

·        Thermomechanically controlled where applicable

·        Normalized condition where specified

·        Normalized and tempered condition where specified

·        Other agreed conditions according to grade and purchase requirements

The applicable heat-treatment and delivery requirements should be confirmed against the specified grade and product form.

Heat Treatment

Heat treatment may be applied according to the grade, thickness and agreed delivery requirements.

Available conditions can include:

·        As rolled

·        Normalized

·        Normalized and tempered

·        Controlled rolling

·        Stress-relieved condition where specified

The actual heat-treatment condition should be specified at the time of order.

Surface Finish

JIS G 3106 rolled steel sheets and plates can be supplied with different surface finishes according to the customer's requirements.

Common options include:

·        Hot-rolled mill finish

·        Descaled finish

·        Pickled finish

·        Shot-blasted finish

·        Pickled and oiled finish

·        Primer-coated finish

·        Cleaned and conditioned surface

·        Customized surface preparation

Delivery Condition

JIS G 3106 products can be supplied in suitable delivery conditions based on grade, thickness and application.

Typical delivery conditions include:

·        As hot rolled

·        Straightened

·        Normalized

·        Normalized and tempered

·        Stress relieved where specified

·        Descaled

·        Pickled and oiled

·        Shot blasted and primed

·        Cut-to-length

·        Customized delivery condition

Dimensions and Tolerances

Dimensions, shape, mass and tolerances are controlled according to the applicable JIS requirements and referenced dimensional standards.

Products can be supplied in:

·        Standard thicknesses

·        Custom thicknesses

·        Standard widths

·        Custom widths

·        Cut-to-length sheets

·        Heavy plates

·        Hot-rolled coils and strips where applicable

·        Customized dimensions according to purchase requirements

For larger plate thicknesses, special applicability and mechanical requirements may be agreed between the purchaser and manufacturer.

Welded Structural Steel Characteristics

JIS G 3106 steels are characterized by:

·        Excellent weldability

·        Controlled carbon content

·        Good structural strength

·        Good fabrication characteristics

·        Suitable toughness for specified grades

·        Controlled carbon equivalent

·        Good performance in welded construction

·        Availability in multiple strength levels

·        Suitability for heavy structural fabrication

The B and C grades in particular include specified Charpy impact requirements at 0 °C, while SM570 has a specified Charpy requirement at −5 °C under the standard's requirements.

Forms of Supply

Ladhani Metal Corporation can supply JIS G 3106 materials in various forms, subject to grade and size availability:

·        Rolled steel sheets

·        Steel plates

·        Hot-rolled sheets

·        Hot-rolled plates

·        Steel strips

·        Hot-rolled coils

·        Structural flats

·        Structural sections

·        Cut-to-size plates

·        Cut-to-length sheets

·        Custom fabricated sizes

Applications

JIS G 3106 welded structural steel is used for:

·        Bridges

·        Shipbuilding

·        Railway rolling stock

·        Petroleum storage tanks

·        Containers

·        Industrial structures

·        Heavy structural fabrication

·        Welded machinery structures

·        Structural frames

·        Engineering structures

·        Transportation infrastructure

·        Heavy-duty welded components

The standard specifically identifies bridges, ships, rolling stock, petroleum storage tanks and containers among its intended welded-structure applications.

Key Features

·        JIS G 3106:2024 compliant material

·        Mild steel and carbon structural steel grades

·        Excellent weldability

·        11 principal SM grades

·        Tensile strength from 400 MPa to 720 MPa

·        Controlled chemical composition

·        Carbon-equivalent requirements for weldability

·        Charpy impact requirements for specified grades

·        Hot-rolled steel sheets and plates

·        Suitable for heavy welded structures

·        Multiple surface-finish options

·        Multiple delivery conditions

·        Custom sizes available on order

Availability

JIS G 3106 rolled steel sheets and plates are available on order basis from Ladhani Metal Corporation.

Availability depends on:

·        Grade

·        Thickness

·        Width

·        Length

·        Surface finish

·        Delivery condition

·        Quantity

·        Required testing and documentation

Conclusion

JIS G 3106 is a specification for highly weldable hot-rolled steels intended for welded structural applications. With grades ranging from SM400A through SM570, the standard provides different strength levels for applications requiring reliable welding performance and structural strength.

Ladhani Metal Corporation supplies JIS G 3106 rolled steel sheets, plates and related products in MS/CS welded structural grades as per customer requirements.

To place an order or enquiry, contact Ladhani Metal Corporation.

#JISG3106 #JISG3106Steel #JISG3106RolledSteel #JISG3106Standard #JISG3106Sheets #RolledSteelSheets #StructuralSteel #WeldableSteel #SteelSheets #SteelPlates #CarbonSteel #StructuralSteelPlates #MildSteel #MSSheets #MSPlates #SteelSheetManufacturer #SteelSheetSupplier #SteelSheetExporter #SteelManufacturer #SteelSupplier #SteelExporter #SteelStockist #SteelDistributor #IndustrialSteel #EngineeringSteel #SteelProducts #JISStandards #JapaneseSteelStandards #IndustrialMaterials #Mumbai #Delhi #Chennai #Kolkata #Bengaluru #Hyderabad #Ahmedabad #Pune #Surat #Jaipur #Lucknow #Kanpur #Nagpur #Indore #Srinagar #Aurangabad #Dhanbad #Amritsar #NaviMumbai #Allahabad #Ranchi #Howrah #Jabalpur #Gwalior #Vijayawada #Jodhpur #Raipur #Kota #Guwahati #Chandigarh #Solapur #Hubli #Mysuru #Tiruchirappalli #Bareilly

@Mumbai @Delhi @Chennai @Kolkata @Hyderabad @Bengaluru