Steel Plate & Sheet

Carbon & Structural Steel Plate

Himount supplies carbon structural plate and low-alloy high-strength structural plate for fabrication, machinery bases, welded structures and general project steel supply.

Product Overview

Carbon & Structural Steel Plate

Carbon and structural steel plate covers hot rolled plate and cut-to-size plate used for structural fabrication, machine frames, base plates, building components, welded assemblies and general industrial projects. This page focuses on common structural plate grades such as ASTM A36, ASTM A572 Grade 50, EN 10025 S235/S275/S355, JIS G3101 SS400, GB/T 700 Q235B and GB/T 1591 Q355B. Pressure vessel, shipbuilding, bridge-special and wear resistant plates are handled under separate product pages.

ASTM A36Carbon structural plate reference
ASTM A572HSLA structural plate grades
EN 10025S235, S275 and S355 series
Q235 / Q355Common GB structural grades
Carbon structural steel plate stackCarbon structural steel plate yard stockCarbon steel plate edge stack

Key Specifications

Product seriesHot rolled carbon structural steel plate, low-alloy high-strength structural steel plate, mill plate and cut-to-size plate.
Primary standardsASTM A36/A36M, ASTM A572/A572M, EN 10025-2, JIS G3101, GB/T 700, GB/T 1591 and GB/T 3274 dimensional references where applicable.
Common gradesA36, A572 Gr.42/50/55/60/65, S235JR, S275JR, S355JR/S355J2, SS400, Q235B and Q355B. Legacy Q345B references should be confirmed against the ordered Chinese standard edition.
Manufacturing routeHot rolled plate supplied as mill plate, sheared plate, flame-cut plate or cut-to-length sheet according to order and project drawing.
Size rangeThickness, width and length are confirmed by mill capability, grade, tolerance class and order. Common RFQs should state thickness in mm, plate width, plate length, quantity and cutting tolerance.
Surface and deliveryAs-rolled, shot blasted, primer coated, oiled or bare surface can be discussed by order. Delivery condition, edge condition, flatness and inspection level should be confirmed before contract.
Order details to confirmStandard, grade, thickness, width, length, quantity, tolerance, edge condition, surface treatment, MTC requirement, third-party inspection, packing method and destination port.

Typical Applications

  • General welded structures and fabrication
  • Machinery frames, base plates and equipment supports
  • Building components, platforms and brackets
  • Cut parts, gusset plates and structural assemblies
  • Industrial projects requiring carbon or HSLA plate

Procurement Notes

  • Do not mix structural plate with pressure vessel, marine, bridge-special or wear resistant plate unless the project specification explicitly allows it.
  • Confirm whether the buyer needs carbon structural plate such as A36/Q235/SS400 or HSLA plate such as A572 Gr.50/S355/Q355.
  • For cut parts, provide drawing, cutting method, tolerance, hole processing, marking, packing and inspection requirements together with the RFQ.

International Model Search Index

Common standards, grades and RFQ terms

Standards and grade calls
ASTM A36 steel plateASTM A572 Grade 50 plateEN 10025 S235JR plateEN 10025 S355JR steel plateJIS G3101 SS400 plateGB/T 700 Q235B plateGB/T 1591 Q355B plate
Size and order phrases
6 mm steel plate10 mm carbon steel plate20 mm structural platecut-to-size steel platemill edge plateflame cut plateshot blasted and primed plate
Buyer search phrases
A36 steel plate supplierA572 Grade 50 plate exporterS355JR steel plate supplierSS400 steel plate priceQ235B steel plate supplierQ355B structural steel platecarbon steel plate cut to size

These terms reflect common international RFQ language. Final supply must follow the ordered standard edition, project specification, MTC, inspection plan and agreed contract terms.

Buyer FAQ

Questions buyers usually confirm before order

Is A36 plate the same as S355 or Q355?

No. A36 is a common carbon structural plate grade, while S355 and Q355 are higher strength structural grades under different standard systems. The ordered standard and grade must match the project specification.

Can Q345B still be used in an RFQ?

Some buyers still use legacy Q345B wording, but current orders should confirm the applicable Chinese standard edition and whether Q355B is required for the project.

What size information is needed for quotation?

Provide thickness, width, length, quantity, tolerance, cutting requirement, edge condition, surface treatment, MTC level, packing and destination port. Drawings are needed for cut parts.

When should another plate page be used?

Use the pressure vessel, marine, bridge, pipeline, wind, heavy equipment, weathering or wear resistant plate pages when the project requires those dedicated standards or performance requirements.

Related Products

Products often quoted together

Pressure Vessel & Boiler Steel PlateMarine, Bridge & Building PlatePipeline, Wind & Heavy Equipment PlateWeathering & Wear Resistant Plate

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