High-Strength Structural Steel Plate

Product Specifications

Technical details and manufacturing context for High-Strength Structural Steel Plate

Definition

High-strength structural steel plate is a semi-finished industrial material produced through controlled hot-rolling processes to achieve specific mechanical properties. It serves as the foundational raw material for fabricating primary load-bearing elements in construction and infrastructure projects, including building frameworks, bridge girders, and industrial support structures. In B2B supply chains, manufacturers purchase these plates in bulk from steel mills and process them through cutting, drilling, and welding operations to create finished structural components. The material's consistent quality and standardized dimensions enable efficient manufacturing workflows and reliable structural performance across diverse engineering applications. The plate is available in thicknesses from 6 to 120 mm, widths from 1500 to 3500 mm, and lengths from 6000 to 12000 mm, with custom lengths available. Mechanical properties include yield strength of 345–460 MPa, tensile strength of 470–630 MPa, elongation of 17–22%, and impact energy of at least 34 J at -20°C. The carbon equivalent is ≤0.45%, indicating good weldability. Surface finish is pickled and oiled to prevent rust during transport. Flatness is ≤3 mm/m, and density is 7.85 g/cm³. These values are reference ranges per GB/T 1591 and GB/T 709; actual values must be confirmed with the supplier for specific applications. The plate is composed of carbon steel with manganese, silicon, and micro-alloying elements. It is used in structural frameworks and beams where high strength and ductility are required. For procurement, verify that the material meets the required standards and specifications for your project.

Working Principle

The plate provides structural integrity through its high yield strength and ductility. When incorporated into frameworks, it distributes loads across the structure, resisting deformation under stress. The material's yield strength indicates the stress at which plastic deformation begins, while tensile strength measures the maximum stress before fracture. Ductility, expressed as elongation, allows the plate to absorb energy and deform without sudden failure. The carbon equivalent influences weldability, ensuring that welded joints maintain strength. The plate's thickness and width contribute to its load-bearing capacity and stiffness. Proper selection and verification of these properties are essential to ensure safe and reliable performance in structural applications.

Common Materials

Carbon steel, Manganese, Silicon, Micro-alloying elements

Technical Parameters

Parameter	Typical range	Notes & selection driver
Yield StrengthRequired	345–460 MPa	Minimum stress at which material begins to deform plasticallyGB/T 1591
Tensile StrengthRequired	470–630 MPa	Maximum stress material can withstand while being stretchedGB/T 1591
ElongationRequired	17–22 %	Percentage increase in gauge length at fractureGB/T 1591
ThicknessRequired	6–120 mm	Nominal plate thickness for structural calculationsGB/T 709
WidthRequired	1500–3500 mm	Standard plate width for manufacturing efficiencyGB/T 709
Carbon Equivalent	≤0.45 %	Calculated value predicting weldability and hardenabilityGB/T 1591
Impact Energy	≥34 J	At -20°C for toughnessGB/T 1591
Surface Finish	Pickled and oiled	Prevents rust during transport
Flatness	≤3 mm/m	Per meter for precisionGB/T 709
Density	7.85 g/cm³	Standard steel density
Length	6000–12000 mm	Custom length availableGB/T 709

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM

Steel Matrix Part
Primary load-bearing structure providing strength and stiffness

Material: Ferrite-pearlite microstructure
Alloying Elements Part
Enhance mechanical properties through solid solution strengthening

Material: Manganese, silicon, micro-alloys
Surface Scale Optional Part
Protects against atmospheric corrosion during storage and transport

Material: Iron oxide layer

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for High-Strength Structural Steel Plate.

Manufacturers of High-Strength Structural Steel Plate

2 companies list this product among what they make. Company figures are quoted from each company's own website; every card states where the relationship came from.

Glory Steel Work

Shandong, CN

Also makes: Pressure Vessel, Track System

Listed on the company's own website · profile compiled by CNFX from public sources

View profile Send enquiry

Shandong Huitong Steel Co., Ltd.

Fujian, CN

Also makes: Hot-Rolled Carbon Steel Plate, Galvanized Steel Coil, Pressure Vessel Quality Steel Plate and 3 more

Listed on the company's own website · profile compiled by CNFX from public sources

View profile Send enquiry

Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

Check the legal entity, factory address, ownership, certifications, and direct contacts.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Frequently Asked Questions

What are the typical thickness ranges for this steel plate?

According to the directory reference, the nominal thickness ranges from 6 to 120 mm, as per GB/T 709. However, actual available thicknesses may vary by supplier, so it is essential to confirm with the manufacturer or supplier for specific product availability.

What mechanical properties are specified for this plate?

The reference values include yield strength of 345–460 MPa, tensile strength of 470–630 MPa, elongation of 17–22%, and impact energy of at least 34 J at -20°C, per GB/T 1591. These are typical ranges; always verify the actual test certificate for the specific batch.

Is this steel plate suitable for welding?

The carbon equivalent is specified as ≤0.45%, which indicates good weldability. However, welding procedures must be qualified based on the actual material properties and thickness. Consult the supplier for recommended welding practices and any preheat requirements.

How should I verify the quality of the plate before purchase?

Request a material test certificate from the supplier that confirms the mechanical properties and chemical composition. Also, check that the plate meets the relevant standards (e.g., GB/T 1591 and GB/T 709) and inspect for surface defects or dimensional tolerances. Always confirm that the supplier is authorized to provide such documentation.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification

This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

Buyer enquiry

Request manufacturing insight for High-Strength Structural Steel Plate

Ask for use case, specification boundaries, supplier type, and RFQ preparation information for this product.

Where it goes: Straight to the CNFX editorial desk, and to the manufacturer if this product is linked to a claimed profile. Nothing is broadcast to a supplier list.
Your details stay here: We do not sell or rent enquiry data, and we do not add you to a mailing list. Used only to answer this request.
No commission, no middleman: CNFX is a directory. We take no cut of any order and never negotiate on a supplier's behalf.
What we don't claim: A listing is not an endorsement. Qualify every supplier and verify every figure yourself before ordering.

pressure:	Not applicable (structural load-bearing capacity instead)
other spec:	Yield strength: 345-690 MPa, Tensile strength: 450-830 MPa, Thickness range: 6-200 mm
temperature:	-40°C to 400°C (for standard grades; specialized grades available for higher/lower temperatures)