Product reference photographs. Confirm grade, finish and supply specification with your enquiry.

Weathering structural steel plate

Weathering steel plate for suitable exterior structural and architectural applications. Material grade and exposure conditions must be considered together.

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Product form: Plate
Surface / finish: Weathering steel
Grade / standard: ASTM A588 Grades A / B / C / K
Thickness: To the selected grade and plate specification
Width: 100–3,000 mm reference supply range

Alex

Primary contact

+8613622177611 alex@steelfcc.com Call Alex

Anna

+8617506352922 anna@steelfcc.com Call Anna

Plan your order

Material & processing

Specify dimensions and tolerances. Include the grade or describe your intended use if it is not yet selected.

Quantity & timing

Share your required tonnage and delivery date. Ask for stock availability, minimum order quantity and the dispatch schedule for your exact specification.

Packing & documents

Include destination, handling limits and required inspection documents so they can be reviewed with the material quotation.

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Product details

ASTM A588 weathering structural steel plate should be specified by grade, thickness and the requirements of the finished structure. Review the grade-specific chemistry and thickness-dependent strength tables below, then include plate dimensions, cutting requirements and the delivery condition in your enquiry. For exposed applications, describe the site environment and intended surface appearance so project suitability and any additional finishing requirements can be reviewed.

Weathering structural steel plate for architectural fabrication and structural applications with atmospheric-corrosion requirements. Select the grade, dimensions, finish and inspection requirements for your order.

Grade selection

Select the exact grade and purchasing standard from the tables below.

Delivery condition

Specify surface finish, heat treatment and dimensional tolerances.

Inspection & supply

Agree test documentation, packing and shipment requirements.

Typical application

Architectural fabrication and structural applications with atmospheric-corrosion requirements.

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Product specifications

Product specifications for Weathering structural steel plate
Product form	Plate
Grade / standard	ASTM A588 Grades A / B / C / K
Width	100–3,000 mm reference supply range
Manufacturing process	Hot rolled; final heat treatment according to the selected grade
Cut length	1–12 m or cut to order
Delivery condition	As rolled, normalized or quenched and tempered only as permitted by the selected grade
Thickness	To the selected grade and plate specification
Dimensional tolerances	To the ordered product standard and agreed drawing
Inspection	Material identification, dimensions, surface and specified test report
Packaging	Protective wrapping, edge protection and steel strapping as agreed

Dimensions and finishes depend on the selected grade and processing route; not every size and finish combination is available. The technical tables describe the stated grades and test conditions. Your quotation should identify the exact supply specification and applicable standard.

Grade-specific technical data

Select the exact grade to view its composition, mechanical properties and test conditions. Grades and standards are not interchangeable; confirm the ordered edition and delivery condition. These reference tables are not a live stock list.

ASTM A588

Chemical composition (% by mass)

A588	C	Mn	P	S	Ni	Si	Cr
GradeA	≤ 0.19	0.80~1.25	≤ 0.04	≤ 0.05	≤ 0.40	0.30-0.65	0.40-0.65
GradeB	≤ 0.20	0.75~1.35	≤ 0.04	≤ 0.05	≤ 0.50	0.15-0.50	0.40-0.70
GradeC	≤ 0.15	0.80~1.35	≤ 0.04	≤ 0.05	0.25-0.50	0.15-0.40	0.30-0.50
GradeK	≤ 0.17	0.50~1.20	≤ 0.04	≤ 0.05	≤ 0.40	0.25-0.50	0.40-0.70

Product-matched supplier reference. Heat treatment, thickness and test orientation must match the purchase specification. This source table lists selected elements only; copper and other grade requirements must also be specified.

Mechanical properties

A588	Tensile Strength	Yield Strength	Elongation 200mm%	Elongation 50 mm (%)
Thickness≤100mm	485	345	18	21
Thickness>100-125mm	460	315	-	21
Thickness>125-200mm	435	290	-	21

Product-matched supplier reference. Heat treatment, thickness and test orientation must match the purchase specification.

Physical properties

Physical Performance	Metric	Imperial
Density	7.75g/cc	0.280 lb/in³

Product-matched supplier reference. Heat treatment, thickness and test orientation must match the purchase specification.

Surface & processing requirements

Include the downstream process in your enquiry so that the material, dimensions and surface can be reviewed together.

Cut-to-size requirements	Final length and width, cutting method and edge condition.
Forming / fabrication	Describe the downstream forming, pressing, profiling or fabrication operation.
Finishing requirements	State whether material will be painted, coated or otherwise finished after delivery.
Plate / sheet handling	Confirm lifting method, stack height and protection of edges and surfaces.

Production & processing

Define the material and the downstream process together. Cutting, slitting or finishing requirements should form part of the order specification.

Material review

Grade, dimensions and surface requirements are checked against the enquiry.

Processing scope

Agree cutting, slitting or forming requirements and the finished product tolerances.

Order inspection

Define acceptance criteria, identification and the requested documentation.

Rolling, processing and production facilities

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Stock & warehouse

Warehouse photographs illustrate storage and handling. For a current stock check, send the grade, dimensions and tonnage; ask for the available quantity and order-specific material photographs before purchase.

Plate and sheet stock in covered storage

Quality inspection & documentation

Agree the acceptance criteria and required documents before confirming your order.

Material identificationGrade, standard and requested test documentation.
Dimensions & surfaceThickness, width, finish and agreed tolerances.
Order documentsProduct identification, packing list and inspection scope.

Quality requirements

Packaging & shipment

Tell us how the material will be transported, unloaded and stored. Specify moisture protection, edge protection, package weight and destination with your enquiry.

Protective packing, loading and export shipment

Protection	Moisture barrier, edge protection and surface protection as agreed.
Unit weight	Specify the coil or bundle weight for your unloading equipment.
Identification	Product, grade, dimensions and order reference on the agreed packing list.
Delivery	Confirm destination, transport method and delivery terms in the quotation.

Material test reports & order documents

Use the document types below to define your quality requirements. Ask Alex or Anna which documents apply to the selected material; document type and inspection scope should be agreed before order confirmation.

Material test report	Heat or coil number, ordered grade, chemical composition and mechanical test results.
Inspection document	Specify the required EN 10204 document type and inspection scope in the enquiry.
Conformity documents	Request an original copy showing the issuing body, holder, number, applicable scope and validity.

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Frequently asked questions

What should an ASTM A588 weathering plate enquiry include?

Specify ASTM A588 and the required grade, standard edition, thickness, width, length and quantity. Add drawing-based cutting details, surface requirements, delivery condition and required inspection documents. Identify the intended application and exposure environment.

Is weathering steel suitable for every outdoor environment?

Suitability depends on the project, environment and design details. Do not assume that selecting a weathering grade eliminates the need to review corrosion exposure, drainage and maintenance requirements. Have the project designer confirm the material and protective strategy.

Can I use one A588 strength value for every plate thickness?

Use the property row that corresponds to the ordered thickness and grade. The reference table separates thickness bands; test orientation, heat treatment and the applicable specification must also match the order.

How are minimum order and lead time confirmed?

Send your grade, size, tonnage and required delivery date. Ask for separate confirmation of stock availability, any production or processing time, and the dispatch date. Transit time depends on destination and shipment terms; the agreed quotation should state the minimum quantity and schedule.

What documents should I request?

List the required material test report, inspection document type and any third-party inspection in your enquiry. Ask which documents apply to your selected material and agree their scope before ordering. A general company certificate does not replace the material test results for the supplied heat or coil.