Description

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Flat steel is a kind of steel with rectangular or flat strip-like cross-section, its width usually ranges from 12-300mm and thickness from 4-60mm, and special specifications can be customised according to requirements. The materials cover ordinary carbon steel, high-quality carbon steel, stainless steel and alloy steel, etc., to meet the requirements of different scenarios for strength, corrosion resistance and abrasion resistance. The core advantage of flat steel lies in its 'flat' design, thin and wide cross-section is easy to embedded in the structure or combined with other components; through the reasonable thickness design, it can withstand a variety of mechanical loads such as tensile, bending; easy to cut, weld, drill holes, to meet the needs of complex processes.

Product Parameter (Specification)

Products description:

Product information	Parameter	Product intormation	Parameter
Product name	Stainless steel flat bar	Standard	ASTM, JIS, DIN, EN
Length	Customised to customer requirements	Certification	ISO, SGS
Grade-ASTM	201, 202, 302, 304, 304L, 310, 310S, 316, 316L, 321, 410, 431, 430F, 904L & other	Price term	FOB,CIF
Technique	Cold rolled hot rolled	Payment terms	T/T L/C
Packaging and delivery
Note : bundle, plastic bags, thin film, wooden pallet, standard seaworthy export packing or as customer demands

Product Feature and Application

Construction

In the construction field, flat steel is the 'invisible pillar' of the steel structure system.

Skeleton support: as the connecting plate or reinforcement of steel beams and columns, flat steel is fixed by welding or bolting to enhance the stability and shear resistance of the overall structure.

Pre-embedded components: Flat steel is pre-embedded before the concrete is poured, used to fix equipment bases and pipe supports, ensuring accurate and efficient installation at a later stage.

Decoration and safety: processed into stair treads, platform anti-slip strips or metal fences, combining functionality and industrial aesthetics.

Mechanical Manufacturing

Flat steel plays a central role in machining:

Basic structural components: as gear blanks, bearing housings, guide rails or frame beams, providing a stable load-bearing platform.

Connections and transmissions: cut into connecting plates, chain plates or drive belt supports to ensure precise coordination and power transmission between equipment components.

Moulds and tooling: High precision cold rolled flat steel can be used to manufacture stamping mould pads or fixtures to ensure the stability of mass production.

Transportation

Flat steel is widely used in vehicles, ships and rail transport:

Automotive industry: used for frame longitudinal beams, chassis reinforcement or cargo box floor, through the reasonable design of the thickness to achieve the unity of lightweight and high strength.

Shipbuilding: as bulkhead support plates or deck edge guards, the corrosion resistance of flat steel (especially stainless steel) can resist the erosion of the marine environment.

Rail transport: processed into rail fasteners or carriage skeleton connectors, adapting to high-frequency vibration and long-term fatigue loading.

Energy and Power

In power transmission and energy facilities, flat steel is the guarantee of safe operation:

Power transmission towers: as a reinforcement plate of angle steel or cross-stretching bracket, to enhance the tower's resistance to wind loads and deformation resistance.

Power equipment: transformer bases and distribution cabinet frames rely on flat steel for stable support, while its conductivity can be used for earthing systems.

New energy field: the keel of solar energy stent, the connectors of wind turbine, flat steel is indispensable in the green energy infrastructure.

Home and public facilities

Flat steel is moving from the industrial field to daily life:

Furniture design: customised metal table and chair frames, bookshelf laminates or decorative partitions, showing a simple and hard modern style.

Municipal engineering: Used for the base of street light poles, bus shelter roof supports or green belt guardrails, combining durability with low-cost maintenance.

Art installation: through bending, hollowing or surface treatment, flat steel can be transformed into sculpture, signage and other creative carriers.

Production Details

Product specifications and forms

Item	Parameter range	Description
Material grade	304 (06Cr19Ni10)	Conformity standard: GB/T 1220-2007 (national standard), ASTM A240/A240M (American standard).
Cross-section shape	Rectangle	Thickness and width of the combination of different specifications, edges can be right-angled or rounded processing
Thickness (mm)	3 ~ 20	Common thickness: 3, 5, 6, 8, 10, 12, 15, 20 (can be customised non-standard size)
Width (mm)	20 ~ 200	Common width: 20, 30, 40, 50, 60, 80, 100, 120, 150, 200 (on request)
Length (m)	1 ~ 6	Commonly specified size is 6 metres, support section cutting or special length customisation
Surface condition	2B, BA, No.4, brushed, sandblasted, etc.	2B (cold rolled bright), BA (mirror), No.4 (brushed) is commonly used in industry, and the decorative scene can be polished or colour-plated treatment.

FAQ

Q: What is flat steel?

A: Flat steel is a kind of steel with flat rectangular or strip cross-section, usually 12-300mm in width and 4-60mm in thickness, with materials covering carbon steel, stainless steel, alloy steel and so on. Because of its simple structure and easy processing, it is widely used in construction, machinery, transport and other fields.

Q: What is the difference between flat steel and steel plate?

A: Differences in shape: Flat steel is long, with a fixed and narrow width; steel plates are flat, with greater width and length.
Differences in use: Flat steel is mostly used for structural support, connectors or small parts; steel plate is often used for large area covering (e.g. car body, box) or cutting and processing.

Q: How to choose the material of flat steel?

A: Ordinary carbon steel (e.g. Q235): low cost, suitable for general building or mechanical structures.
Stainless steel (e.g. 304/316): high corrosion resistance, suitable for outdoor, chemical or marine environment.
Alloy steel (e.g. 40Cr): high strength and wear-resistant, used for heavy-duty machinery or high-strength connectors.

Q: What is the difference between hot rolled flat steel and cold rolled flat steel?

A: Hot rolled flat steel: rolled at high temperature, the surface of the oxide skin, size tolerance, low cost, suitable for general structural parts.
Cold rolled flat steel: rolled at room temperature, smooth surface, high precision, but more expensive, mostly used in precision machinery or decorative areas.

Q: Can flat steel be bent or welded?

A: Bending: can be formed by mechanical bending or hot bending, but need to pay attention to the bending radius to avoid breakage, especially high carbon steel.
Welding: Flat steel welding performance is good, but need to choose the welding rod according to the material, such as stainless steel need to use special welding consumables.

Q: Will flat steel rust when used outdoors?

A: Ordinary carbon steel flat steel is prone to rusting in humid environments and requires surface treatment such as hot-dip galvanising, plastic spraying or painting. Stainless steel flat steel, such as 304 has better corrosion resistance in regular outdoor environments.

Q: Can flat steel replace angles or I-beams?

A: In some scenarios, yes: e.g. in lightweight structures or non-major load-bearing areas, flat steel can be combined and welded to achieve a similar function.
No substitution is recommended: when subjected to complex loads such as torsion and lateral pressure, profiles such as angles and I-beams are preferable.

Q: How to store and maintain flat steel?

A: Storage environment: dry and ventilated, avoid contact with acid, alkali and other corrosive substances.
Anti-rust treatment: unused flat steel can be coated with anti-rust oil or covered with moisture-proof film.
Regular inspection: Long-term stock need to spot check the surface condition to prevent oxidation and corrosion.