Carbon Steel Profile

 

Item	Available Specifications
Product	Carbon Steel Profiles / Structural Steel Sections
Profile Types	H, I, U, C, L, T, Z, Flat, HP and Custom Sections
Steel Grades	ASTM A36, A572 Gr.50, A992, S235JR, S275JR, S355JR/J2, SS400, Q235B, Q355B
Material Standards	ASTM A36/A572/A992, EN 10025-2, JIS G3101/G3106, GB/T 700/1591, as applicable
Manufacturing	Hot Rolling, Cold Roll Forming, Welding and Fabrication
Dimensions & Length	Standard Section Series / Project-Specific Sizes / Cut-to-Length
Surface Finish	As-Rolled, Shot-Blasted, Primed, Painted or Galvanized
Inspection & Documents	MTC, EN 10204 3.1 Where Specified, Dimensional Inspection, Optional Third-Party Inspection

Grade, manufacturing route, size availability and applicable technical standards are confirmed individually for each profile and purchase order.

Complete Structural Steel Section Solutions

Dongmeng Group offers a comprehensive range of structural steel profiles, covering primary load-bearing members, secondary framing components, connection materials and customized structural sections.

Our portfolio is organized by cross-sectional geometry and manufacturing method to help buyers identify suitable profiles for their projects.

1.1 H Beams & Wide Flange Sections

H Beam / Universal Column / Wide Flange Beam

H-shaped steel sections feature a central web and two flanges. Different section series offer varying combinations of depth, flange width, thickness and sectional properties.

They are widely specified for primary structural framing, columns, heavy-duty beams and industrial steel structures.

Common Section Series:

HEA – European wide flange sections

HEB – European wide flange sections

HEM – Heavy European wide flange sections

W Shapes – American wide flange sections

UB – Universal Beams

UC – Universal Columns

GB/T H Sections – Chinese structural H profiles

Available Grade Families: S235, S275, S355, ASTM A36, ASTM A572, ASTM A992, Q235 and Q355, subject to section specifications.

Typical Applications: Steel columns, warehouse frames, industrial buildings, equipment support structures and structural fabrication.

1.2 Carbon Steel I Beams

IPE / IPN / Standard I Sections

I beams consist of two flanges connected by a vertical web. Available section systems include both parallel-flange and tapered-flange designs.

The appropriate I section should be selected using its published sectional properties, loading conditions, support configuration and applicable design code.

Common Section Series:

IPE – European parallel-flange I sections

IPN – European tapered-flange I sections

S Shapes – American standard beams

JIS Standard I Sections

GB/T Standard I Beams

Typical Applications: Floor beams, mezzanine structures, industrial platforms, equipment frames and supporting members.

1.3 Hot-Rolled Steel Channels

UPN / UPE / PFC / C / MC Sections

Hot-rolled channels have an open U-shaped or C-shaped cross-section consisting of a web and two flanges.

They are available with different flange geometries and dimensional systems.

Main Types:

UPN – European channels with tapered inner flange faces.

UPE – European parallel-flange channels.

PFC – Parallel Flange Channels.

C Shapes – American standard channels.

MC Shapes – American miscellaneous channels.

GB/T and JIS Channel Sections.

Channel sections are commonly used as secondary beams, edge members, supports, bracing elements and fabricated structural assemblies.

Note: Hot-rolled structural channels should not be confused with lightweight cold-formed C purlins. Their manufacturing methods, dimensions and structural properties differ.

1.4 Equal Angle Steel

Hot-Rolled Equal Leg Angle / L Section

Equal angles have two perpendicular legs of nominally equal length.

These profiles are commonly used in structural connections, trusses, bracing systems and general steel fabrication.

Designation Example: L50 × 50 × 5 mm.

Typical Applications:

Steel trusses and bracing

Connection supports

Equipment frames

Towers and supporting structures

General industrial fabrication

1.5 Unequal Angle Steel

Hot-Rolled Unequal Leg Angle

Unequal angles feature two perpendicular legs with different nominal dimensions.

They are suitable for structural details where unequal connection surfaces or specific geometric arrangements are required.

Designation Example: L75 × 50 × 6 mm.

Selection should consider the actual section orientation, load eccentricity, connection arrangement and project drawings.

Typical Applications: Structural brackets, connection assemblies, secondary framing, machinery supports and fabricated steel structures.

1.6 Structural T Sections

T Beam / Tee Bar / Cut T Section

T sections consist of a flange and a perpendicular web.

Depending on the required standard and manufacturing route, structural tees may be supplied as rolled sections, split sections cut from suitable H or I profiles, or fabricated components.

Common Types:

Rolled T Sections

Cut T Sections

WT Shapes

Project-Specific Fabricated Tees

Typical Applications: Secondary structural members, connection details, reinforcement components and fabricated assemblies.

1.7 Carbon Steel Flat Bars

Hot-Rolled Flat Steel / Rectangular Flat Sections

Flat bars have a rectangular cross-section and are used extensively in metal fabrication and construction.

They can be supplied in standard dimensions or cut to project-specific lengths.

Typical Applications:

Connection plates and brackets

Frame reinforcement

Support components

Welded assemblies

General manufacturing

Flat bars can also be integrated with beams, channels and angles in consolidated structural material orders.

1.8 Cold-Formed C Purlins

C Section Purlin / Lipped C Channel

Cold-formed C profiles are produced from steel strip or coil using a roll-forming process.

They are widely used as secondary framing members in steel buildings, particularly for roof and wall support systems.

Common Specification Parameters:

Section depth

Flange width

Lip dimensions

Base metal thickness

Steel grade

Coating type and mass

Required length

Hole and punching arrangement

Typical Applications: Roof purlins, wall girts, lightweight framing and industrial building envelopes.

1.9 Cold-Formed Z Purlins

Z Section Purlin / Structural Z Profile

Z purlins feature a Z-shaped cross-section and are commonly used in pre-engineered steel buildings and long-span roofing systems.

Certain Z-section designs allow overlapping or sleeved connections at supports, subject to the selected structural system.

Available Options:

Standard Z Sections

Lipped Z Sections

Customized Lengths

Pre-Punched Profiles

Galvanized or Other Specified Surface Finishes

Typical Applications: Industrial roofing, warehouse structures, agricultural buildings and secondary steel framing.

1.10 Special Cold-Formed Steel Profiles

Sigma / Omega / Hat / Custom Roll-Formed Sections

In addition to conventional C and Z profiles, special cold-formed sections can be supplied according to project requirements and available manufacturing capabilities.

Section geometry, base metal thickness, corner radii, hole positions and coating requirements should be specified in the technical drawings.

Typical Applications: Lightweight supporting systems, secondary framing, specialized industrial structures and project-specific fabricated components.

1.11 HP Sections & Structural Bearing Piles

H-Pile / HP Shape / Wide Flange Bearing Pile

HP sections are structural H-shaped profiles intended for applications such as foundation piles and other specified load-bearing members.

They should be ordered according to an appropriate structural section and material specification.

Typical Applications: Foundation projects, infrastructure, marine-related civil works and industrial foundations, subject to the engineering design and environmental requirements.

1.12 Customized & Built-Up Steel Sections

Welded H Beams / Built-Up Profiles / Project-Specific Sections

Standard hot-rolled profiles do not always satisfy the dimensional or structural requirements of large industrial projects.

Dongmeng Group can coordinate customized section fabrication according to approved technical drawings and production feasibility.

Customization Options:

Welded H and I sections

Built-up structural components

Customized section depths and flange widths

Cutting and welding

Drilling and connection preparation

Shot blasting and specified surface protection

The required steel grade, welding specification, fabrication tolerance, inspection scope and acceptance criteria should be agreed upon before manufacturing.

 

Structural Steel Materials for Different Project Requirements

Dongmeng Group supports structural profile procurement based on American, European, Japanese and Chinese standards.

Material specifications and dimensional specifications must be identified separately when preparing purchase orders.

 

2.1 Material Grade Standards

Standard	Common Grades	Application
ASTM A36/A36M	A36	General carbon structural steel
ASTM A572/A572M	Grade 50	High-strength low-alloy structural steel
ASTM A992/A992M	A992	Structural steel shapes, commonly specified for W sections
EN 10025-2	S235JR, S275JR, S355JR, S355J2	European hot-rolled structural steel
JIS G3101	SS400	General structural rolled steel
JIS G3106	SM490 Series	Rolled steel for welded structures
GB/T 700	Q235 Series	Chinese carbon structural steel
GB/T 1591	Q355 Series	Chinese high-strength low-alloy structural steel

Important: These grades represent different specification systems and must not be considered automatically interchangeable. Chemical composition, mechanical properties, product thickness, impact requirements and applicable product forms should be reviewed before substitution.

 

2.2 Dimensions & Tolerance Standards

Standard	Relevant Section Products
EN 10365	Hot-rolled I, H and channel section dimensions and masses
EN 10034	Structural I and H section dimensional and shape tolerances
EN 10024	Taper-flange I section tolerances
EN 10279	Hot-rolled steel channel tolerances
EN 10056-1 / EN 10056-2	Structural angle dimensions and tolerances
ASTM A6/A6M	General requirements for rolled structural shapes, plates and bars
JIS G3192	Dimensions, mass and permissible variations of hot-rolled steel sections
GB/T 11263	Hot-rolled H and cut T sections
EN 10162	Cold roll-formed steel sections

The relevant edition and any supplementary project requirements should be stated in the purchase order.

2.3 Structural Steel Grade Selection Guide

The following values provide a general reference for common structural steel grades.

Steel Grade	Specified Minimum Yield Strength*
ASTM A36	250 MPa
ASTM A572 Grade 50	345 MPa
ASTM A992	345 MPa
S235JR	235 MPa
S275JR	275 MPa
S355JR	355 MPa
S355J2	355 MPa

Values are indicative for common applicable structural product thicknesses. For EN 10025-2 grades shown here, the stated values apply to the nominal thickness range up to 16 mm. Actual minimum properties must be verified against the specified standard, edition, product geometry and thickness.

Grade Selection Considerations

Required structural design strength

Section thickness and geometry

Working environment and design temperature

Charpy impact requirements

Weldability and fabrication method

Project specification and approval requirements

For example, S355JR and S355J2 share a nominal strength designation, but their specified impact-testing quality requirements differ. The correct quality designation should therefore be confirmed for the intended service conditions.

Dimensional Information Required for Procurement

Structural steel sections are identified by standardized section designations or by their full geometric dimensions.

For accurate quotations, buyers should provide the relevant section series, material grade, length, quantity and any additional dimensional requirements.

Profile Type	Example Designations	Key Dimensions
H Beam	HEA, HEB, HEM, W, UB, UC	Depth, flange width, web and flange thickness
I Beam	IPE, IPN, S	Depth, flange width and section series
Steel Channel	UPN, UPE, PFC, C, MC	Depth, flange dimensions and thickness
Equal Angle	L50×50×5	Leg width and thickness
Unequal Angle	L75×50×6	Two leg dimensions and thickness
Structural Tee	WT / Cut T / Rolled T	Depth, flange width and thickness
Flat Bar	Width × Thickness	Width, thickness and length
C Purlin	C Section Drawing	Depth, flange, lip and base metal thickness
Z Purlin	Z Section Drawing	Depth, flange, lip and base metal thickness
Built-Up Profile	Custom Drawing	Complete geometric and fabrication specifications

Designation examples illustrate ordering formats and do not constitute a guaranteed stock list.

Understanding Structural Section Dimensions

When comparing H and I sections, several dimensional parameters are particularly important:

H / h: Overall section depth

B / b: Flange width

tw: Web thickness

tf: Flange thickness

r: Relevant root or fillet radius

A: Cross-sectional area

Ix / Iy: Second moment of area about the specified axes

Wx / Wy: Elastic section modulus

Mass: Nominal weight per unit length

Engineering buyers should refer to the relevant official section tables for dimensional values and sectional properties.

Theoretical Weight Calculation

For steel sections, the theoretical mass per metre can be estimated from the nominal cross-sectional area:

Weight (kg/m) = Cross-Sectional Area (mm²) × 0.00785

This calculation assumes a nominal steel density of 7,850 kg/m³.

Actual order weight and permissible mass variation should be established according to the applicable product standard and commercial agreement.

 

Structural Steel Section Selection Guide

Different steel profile geometries are designed to meet different loading, fabrication and installation requirements.

Selecting the correct section involves more than matching an approximate outer dimension.

Section Type	Main Geometric Characteristics	Common Use
H / Wide Flange	Two flanges connected by a central web	Primary beams and columns
I Section	I-shaped cross-section with series-specific flange geometry	Beams and framing
U / C Channel	Open section with one web and two flanges	Secondary supports and framing
L Angle	Two perpendicular legs	Bracing, trusses and connections
T Section	Single flange and web	Secondary members and connections
Cold-Formed C	Lightweight formed channel, often with lips	Roof and wall purlins
Cold-Formed Z	Z-shaped formed section	Secondary roof framing
Built-Up Section	Designed and fabricated from multiple steel elements	Customized heavy structural members

H Beam vs I Beam

Although both belong to the broader family of H-shaped or I-shaped structural members, their dimensions and flange configurations vary across different international section systems.

A European HEB section, an IPE section and an American W section should not be selected solely on the basis of their nominal depth.

Actual cross-sectional area, section modulus, moment of inertia, member stability and connection details must be considered.

Hot-Rolled Channel vs Cold-Formed C Purlin

Hot-rolled channels are produced through structural rolling processes, while cold-formed C purlins are manufactured by forming steel strip or sheet.

Their section geometry, corner radii, material condition and design requirements may differ significantly.

They should not be treated as direct replacements without engineering verification.

Equal Angle vs Unequal Angle

Equal and unequal angles have different leg geometries, which affect connection detailing and section properties.

The selection depends on the connection arrangement, load path, available installation space and engineering drawings.

When Are Built-Up Sections Required?

Fabricated sections may be considered when standard rolled profiles cannot meet the required dimensions, structural arrangement or project fabrication specifications.

Engineering approval, welding procedures and inspection requirements should be established before manufacturing.

Need technical assistance? Send us your section designation or engineering drawing for quotation.

From Standard Steel Sections to Project-Ready Components

Dongmeng Group supports steel profile orders requiring additional processing before delivery.

Available services can be coordinated according to material, section size, processing requirements and production feasibility.

Cut-to-Length

Standard profiles can be prepared in customer-specified lengths to reduce unnecessary downstream cutting and material handling.

Drilling & Punching

Connection holes, mounting holes and bolt-hole patterns can be processed according to supplied technical drawings.

Welding & Fabrication

Selected sections can be assembled into project-specific fabricated components based on approved fabrication requirements.

Surface Preparation

Surface preparation options include mechanical cleaning and shot blasting to the agreed specification.

Corrosion Protection

Available surface protection solutions may include:

As-rolled / black steel

Shot-blasted surface

Shop primer

Industrial painting

Batch hot-dip galvanizing

Pre-galvanized surfaces for applicable cold-formed products

For batch hot-dip galvanizing of fabricated structural steel components, ISO 1461 or ASTM A123/A123M may be specified as applicable.

Customized Export Preparation

Additional requirements such as identification marking, length segregation, bundled packing and special shipment preparation can be confirmed before dispatch.

Structural Materials for Industrial and Infrastructure Projects

Industrial Warehouses & Workshops

H beams, I beams, channels and angles are frequently incorporated into steel frames, mezzanines, supporting systems and connection assemblies.

Commercial & Multi-Storey Steel Buildings

Structural steel sections can be specified for beams, columns, secondary framing and supporting members according to approved building designs.

Infrastructure & Civil Engineering

Selected structural profiles are used in engineered supporting structures, access platforms, bridges and foundation-related applications.

Machinery & Equipment Manufacturing

Channels, beams, angles, flat bars and fabricated sections are commonly used in industrial machine bases, support frames and equipment assemblies.

Roofing & Secondary Steel Framing

Cold-formed C and Z purlins provide secondary structural support for roof and wall systems in suitable steel building designs.

Prefabricated & Modular Steel Structures

Structural profiles are used in factory-fabricated modules, supporting frameworks and project-specific steel assemblies.

Material Traceability for International Procurement

For B2B structural steel purchasing, dimensional consistency and material documentation are essential parts of procurement control.

Dongmeng Group can coordinate the inspection and documentation requirements specified in the purchase order.

 

Inspection Item	Scope
Material Identification	Grade and applicable standard verification
Chemical Composition	Review against the applicable material specification
Mechanical Properties	Yield strength, tensile strength and elongation
Dimensional Inspection	Section dimensions and specified tolerances
Surface Inspection	Visual examination of surface condition
Length & Quantity	Delivery verification
Material Documents	MTC / EN 10204 3.1 where specified and available
Third-Party Inspection	Optional, subject to agreement

Additional testing, including relevant impact or nondestructive examinations, should be requested during the quotation stage when required by project specifications.

Documentation availability depends on the actual steel grade, manufacturing source and agreed inspection scope.

Structural Steel Supply for Overseas Projects

We support international orders involving individual profile series and consolidated structural steel material lists.

Available preparation options include:

Section identification and grade marking

Bundling by profile type and dimensions

Suitable protective wrapping where required

Lifting and handling considerations

Special packing arrangements for fabricated components

Export shipping documentation

Project-specific delivery coordination

Mixed-profile procurement can also be reviewed according to the customer's material take-off (MTO) or bill of materials (BOM).

Project-Oriented Structural Steel Procurement

Comprehensive Product Coverage

Source multiple structural profile types through a coordinated procurement process.

International Specification Support

Prepare orders according to the required ASTM, EN, JIS or GB/T material and dimensional specifications.

Value-Added Processing

Combine material procurement with suitable cutting, drilling, surface treatment and fabrication requirements.

Material Inspection & Traceability

Confirm material documentation and project-specific inspection requirements before order placement.

Customizable Supply Arrangements

Review standard section orders as well as special dimensions and drawing-based requirements.

Export-Oriented Coordination

Support international purchasing, packing, material identification and shipment preparation.

Q1. What are carbon steel profiles?

Carbon steel profiles are steel products manufactured with defined cross-sectional geometries, such as H, I, U, C, L and T sections.

The broader structural steel profile market also includes certain high-strength low-alloy steel grades commonly specified for engineering and construction.

Q2. What is the difference between an H beam and an I beam?

The main differences depend on the particular section system, flange configuration and geometric proportions.

The nominal name alone does not establish load-bearing capacity. Buyers should compare the actual section dimensions and published structural properties.

Q3. Which steel grades are commonly used for structural profiles?

Common grades include ASTM A36, ASTM A572 Grade 50, ASTM A992, S235JR, S275JR, S355JR, S355J2, SS400, Q235 and Q355.

Grade availability depends on the section series and relevant manufacturing specifications.

Q4. Are ASTM A36 and S235JR equivalent?

They are separate material specifications. Although both are commonly used for general structural applications, their chemical composition, mechanical requirements and testing provisions should be reviewed before any substitution.

Q5. What is the difference between UPN and UPE channels?

UPN channels have tapered inner flange faces, while UPE channels feature parallel flanges.

The profiles have different geometric characteristics and must be ordered using their correct dimensional series.

Q6. What is the difference between C and Z purlins?

Both are commonly produced by cold roll forming.

C sections have a generally channel-shaped cross-section, while Z sections have a Z-shaped configuration. The selected purlin type depends on the building system and engineering design.

Q7. Can structural steel profiles be galvanized?

Yes. Suitable structural profiles and fabricated components may undergo batch hot-dip galvanizing.

Applicable coating requirements can be specified according to ISO 1461 or ASTM A123/A123M, depending on the project.

Cold-formed profiles may also be manufactured from pre-galvanized steel strip, which follows a different coating process.

Q8. Can you supply customized profile dimensions?

Custom fabricated or cold-formed section dimensions can be reviewed based on technical drawings, order quantity and available manufacturing capabilities.

Non-standard hot-rolled dimensions may require specific rolling arrangements and minimum production quantities.

Q9. Can you provide EN 10204 3.1 material certificates?

Material certification can be included in the quotation requirements where available from the relevant manufacturing source.

Please specify the required certificate type before confirming the purchase order.

Q10. What information is required for an accurate quotation?

Please provide the profile type, designation or dimensions, material grade, technical standard, required length, quantity, surface treatment and delivery destination.

For fabricated sections, technical drawings and inspection requirements should also be included.

Q11. Can different steel profiles be combined in one order?

Orders containing beams, channels, angles and other structural materials can be reviewed for consolidated procurement and shipment.

Availability and delivery arrangements are confirmed according to the actual material list.

Q12. How is the theoretical weight of a structural steel section calculated?

Nominal section weight is determined using the cross-sectional area and material density.

For standardized profiles, buyers should use the published theoretical weight in the applicable section table.

For non-standard fabricated sections, the weight can be calculated from the detailed section geometry and specified material density.

Send Us Your Structural Steel Material List

Looking for a supplier of carbon steel profiles for your next industrial or construction project?

Xi'an Dongmeng Group Co., Ltd. welcomes enquiries from steel distributors, structural fabricators, contractors, EPC companies, equipment manufacturers and international project buyers.

For an accurate quotation, please provide:

RFQ Information	Customer Requirements
Product Type	H Beam / I Beam / Channel / Angle / Other
Section Designation	IPE200 / HEB200 / UPN100 / L50×50×5 / Custom
Steel Grade	ASTM A36 / S355JR / Q355B / Other
Technical Standard	ASTM / EN / JIS / GB/T
Required Length	Standard / Cut-to-Length
Quantity	Pieces / Metric Tons
Surface Treatment	As-Rolled / Painted / Galvanized
Processing	Cutting / Drilling / Welding / Other
Documentation	MTC / Inspection Requirements
Destination	Country / Port / Delivery Terms

Send Your RFQ | Submit Technical Drawings | Contact Our Sales Team

Office Information

Company: Xi'an Dongmeng Group Co., Ltd.

Phone: +86 157 6921 4734

Email: office@dongmjd.com

WhatsApp: Dong, +86 157 6921 4734

Office Address: Room 4107, Runfeng Building, Sanqiao New Street, Weiyang District, Xi'an City, Shaanxi Province, China.

 

Xi'an Dongmeng Group Co., Ltd. is one of the leading carbon steel profile manufacturers and suppliers in China. We warmly welcome you to buy or wholesale cheap carbon steel profile in stock here from our factory. All customized products are with high quality and competitive price. For free sample, contact us now.