Steel Plate

 Steel plate is supplied for welded structures, pressure-retaining fabrication, shipbuilding, corrosion-resistant equipment, and abrasion-duty service where thickness, flatness, mechanical properties, and release documents all matter to the final job. In practical fabrication, the material is selected not only by thickness, but also by grade family, delivery condition, service environment, and required inspection scope.

The main supply routes typically include carbon steel plate for general structural and pressure work, stainless steel plate for corrosion service, shipbuilding plate for marine structures, and wear-resistant plate for liner and impact zones. This keeps the product range broad enough for structural fabrication and process equipment while still matching the way steel plate is actually ordered and released.

This supply range covers common fabrication routes from a36 steel plate for welded support structures to stainless steel plate for tanks, process equipment, and moisture- or chemical-exposed service.Standard supply width is up to 4000 mm. For extra-wide fabrication requiring fewer longitudinal welds and better panel flatness, see our 4100mm Heavy and Wide Plate supply range.

A plate order is usually defined first by service route, then by standard and grade.

• Structural Steel Plate

A36 steel plate is one of the most common structural routes for general welded fabrication. It is widely used for support frames, base plates, brackets, machine foundations, bridge members, and other applications where a reliable carbon steel plate with good fabrication performance is required.

• Pressure Vessel Steel Plate

Pressure-retaining fabrication follows a different route from general structure. For vessel shells, separators, tanks, drums, and other welded pressure-containing components, steel is usually ordered to a pressure-vessel specification such as ASTM A516 rather than a general structural grade. In these jobs, notch toughness, plate condition, and release testing are more important than broad structural-use language.

• Shipbuilding Steel Plate

Marine fabrication requires a plate route suited to hull structures, decks, bulkheads, and offshore welded structures. Grades such as AH36, DH36, and EH36 are commonly used where marine structural performance and project approval requirements are part of the job.

• Stainless Steel Plate

Stainless steel plate is used where the service environment includes washdown, outdoor moisture, chemical contact, or corrosion exposure that cannot be handled by coating alone. Common grades include 304 and 316 for tanks, process equipment, marine-adjacent structures, and corrosion-sensitive fabrication.

• Wear-Resistant Plate

Wear-duty service is selected for abrasion zones rather than general structural loading. In these applications, the important question is not only the thickness of the metal plate, but also the wear route, hardness level, cutting method, and how the part will actually work in contact with sliding material, impact, or repeated abrasion.

A carbon steel plate is usually the more direct option for support structures, base plates, equipment frames, vessel shells, and general welded steelwork where corrosion is not the main design driver. It is widely used in structural fabrication and heavy industry because it is available in broad size ranges and can be processed into cut parts, formed sections, and welded assemblies.

A stainless steel plate becomes the better route where corrosion resistance is required as part of the finished service condition. This includes moisture exposure, chemical processing, outdoor washdown areas, food-contact fabrication, and marine-adjacent installations. In these cases, the material choice is driven less by simple load and more by how the plate will hold up in long-term operating conditions.

In real fabrication work, the decision between carbon steel plate and stainless steel plate is usually tied to:

• Exposure to moisture, salt, chemicals, or washdown
• Required fabrication cleanliness and surface condition
• Coating strategy versus corrosion-resistant base material
• Cost of maintenance, replacement, and shutdown risk
• Welding route and final service environment

A steel plate order often depends as much on processing scope as on grade. Thickness, width, length, cut shape, edge preparation, and delivery condition all affect whether the plate can move directly into fabrication or needs rework before welding and assembly.

Typical processing services include:

• Cut-to-length plate supply
• Flame cutting for heavy carbon steel plate
• Plasma cutting for shaped parts and profile work
• Edge trimming and bevel preparation
• Surface blasting and coating preparation
• Workshop-ready cut parts for welded fabrication

For structural work, cut size and edge condition often decide how efficiently the plate can be fitted into base frames, stiffeners, and welded supports. For stainless steel plate, surface protection and cut quality usually matter more because visible finish, clean welding, and corrosion performance remain part of the finished assembly.

Steel plate is used in structural fabrication, pressure equipment, marine work, corrosion service, and wear-duty applications, with the material route selected by actual working condition rather than by product name alone. In actual fabrication, a36 steel plate is often used for base plates, support frames, and welded brackets on equipment skids or platform structures, where cut size, flatness, and welding fit-up matter more than corrosion resistance. Carbon steel plate is commonly selected for tank shells, separator sections, and other pressure-containing parts, while stainless steel plate is more suitable for water-handling equipment, outdoor moisture-exposed tanks, and chemical-contact fabrication where corrosion risk remains part of the service condition.

Octal supplies steel plate across structural, vessel, stainless, marine, and wear-service routes with attention to size range, processing scope, inspection release, and export documentation. The value is not only in supplying the plate itself, but in supplying the correct grade family, cut condition, and document package for the final fabrication route.

That includes support for:

• Grade and standard confirmation
• Cut-to-size supply
• Delivery condition matching
• Inspection scope confirmation
• Traceable document release
• Export packing and shipment preparation

For heavier or wider jobs, plate supply can also be aligned with large-width requirements, module fabrication, offshore structures, pressure vessels, and other heavy steelwork where dimensional control and release documentation need to stay clean from order to shipment.

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FAQ

 

01.What should be confirmed before ordering steel plate?

The key order points are grade, standard, thickness, width, length, delivery condition, and required test documents. If traceability is required, the order should also confirm the MTR / mill test certificate and any special testing scope. ASTM A480 specifically treats ordering information as part of stainless steel plate supply requirements, and an MTR typically includes the heat number, grade, dimensions, mechanical properties, chemical analysis, and heat treatment information.

02.When should A36 steel plate be used instead of A516 plate?

A36 steel plate is the standard route for bridges, buildings, and general structural fabrication. A516 is used for welded pressure vessels where improved notch toughness is important. If the job is load-bearing structure, A36 is usually the more direct choice. If the job is pressure containment, A516 is the correct route.

03.When is stainless steel plate better than carbon steel plate?

A stainless steel plate route is more suitable when the fabricated part will stay in moisture, marine, water, or corrosion-sensitive service. ASTM A240 covers stainless steel plate for pressure vessels and general applications, while ASTM A480 governs tolerances, flatness, finish, and ordering details. A carbon steel plate route is usually more practical for general structure and vessel fabrication where corrosion is managed by coating or service conditions are less aggressive.

04.Should impact testing or UT be specified on the purchase order?

Yes, if the job requires it. ASTM A36 notes that supplementary requirements apply only when they are specified in the purchase order, and ASTM A516 is written for welded pressure-vessel service where improved notch toughness is important. In practice, that means impact testing, UT, or other additional inspection should be written clearly into the PO instead of being assumed.

Certifications

 

CE Certificate

ISO 9001 Certificate

API Q1 Certificate

ABS Certificate

AP-5L Certificate

API-5CT Certificate

 

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