Flat Steel Bar

Available Grades

S235JR / Q235B Mild Carbon Flat Bar: Universal economical grade, great ductility and weldability, the most popular grade for general structural fabrication and civil construction usage.
S355JR / Q355B Low Alloy Flat Bar: Enhanced high-strength structural grade, better impact and compression resistance, suitable for heavy-load engineering and outdoor supporting structures.
A36 / SS400 International Standard Flat Bar: Global interchangeable structural grade, stable mechanical property, ideal for overseas mechanical parts and steel frame assembly.
1020 / 1045 Medium Carbon Flat Bar: Heat-treatable carbon grade, improved surface hardness, used for wear-resistant fixture, tool base and mechanical connecting parts.
42CrMo Alloy Flat Bar: High-strength alloy modified grade, strong fatigue resistance, customized for heavy-load mechanical supporting and transmission components.

Regular Flat Rectangular Cross-section: Uniform flat surface and right-angle edge design, convenient stacking, positioning and on-site assembly without extra trimming.
Excellent Comprehensive Processability: Support free bending, welding, drilling, punching and cutting, compatible with all ordinary workshop processing equipment.
Dual Craft Surface Option: Hot rolled black finish for engineering structure; cold drawn bright finish for precision machined parts, meet diversified usage demands.
Stable Structural Bearing Capacity: Compact internal metallurgical structure, no internal air hole or crack, strong anti-bending and anti-deformation performance under static load.
Complete Size Customization: Width 12mm-300mm, thickness 3mm-50mm, standard 6m/9m/12m length, support non-standard size customized production.
Good Surface Anti-oxidation Performance: Controlled rolling oxidation layer, easy anti-rust treatment, adapt indoor workshop and outdoor open-air service environment.

Building Steel Structure: Fabricate building embedded parts, wall supports, fence frames and lightning protection grounding flat steel for construction site reinforcement.
General Mechanical Fabrication: Make machine base baffle, connecting plate, fixed bracket and auxiliary structural parts for industrial automation equipment.
Hardware & Daily Metal Parts: Raw material for hinges, tool handles, agricultural machinery accessories, clamp parts and custom metal hardware components.
Bridge & Traffic Infrastructure: Auxiliary stiffener, guardrail connecting plate and fastener base for highway bridge, municipal road traffic facilities.
Ship & Marine Accessories: Deck stiffener, ladder tread and pipe fixing splint for inland ship and offshore ordinary marine equipment structure.
Industrial Pipeline Support: Custom flat bracket and fixing cushion for chemical, water supply pipeline fixing and equipment auxiliary supporting system.

Save Secondary Machining Cost: Standard flat edge and precise size reduce cutting allowance, lower tool wear and shorten workpiece processing cycle.
Lower Overall Procurement Budget: Diversified grade options from economical carbon to high-strength alloy, match different budget and load requirements flexibly.
Improve On-site Assembly Efficiency: Regular flat shape is easy to bind, fix and splice, greatly improving construction and workshop assembly efficiency.
Stable Batch Qualification Rate: Strict rolling and cooling control ensures consistent batch performance, reduce finished workpiece rejection rate for mass production.
One-stop Material Matching: Full grades & full sizes in stock, help buyers realize one-stop purchasing, simplify supplier management and procurement process.

Dual Processing Production Line: Independent hot rolling and cold drawing workshop, supply black rough bar and precision bright flat bar to meet different machining needs.
Strict Full Batch Inspection: Conduct dimension tolerance, hardness and chemical composition test, provide complete batch inspection report before shipment.
In-depth Custom Machining Service: Offer fixed-length cutting, edge chamfering, surface polishing, hole punching and anti-rust coating customized processing.
Mature Global Export Service: Provide MTC, SGS, CE certification, support FOB, CIF, DDP worldwide delivery, smooth customs clearance for all countries.

Standard Seaworthy Anti-rust Package: Flat bars layered with anti-rust paper, bundled with high-strength steel belt, fixed on fumigated wooden pallet, moisture-proof and collision-proof for long sea transit.
Clear Batch Marking: Mark grade, size, batch number, standard logo on each bundle, convenient warehouse receiving, classification and quality tracing.
Customized Outer Packing: Support customer brand logo and project information printing, meet distributor brand sales and unified project material management demands.
Efficient Delivery Arrangement: Stock flat bars 2-6 working days delivery; customized processed flat bars 7-13 working days production cycle, port direct shipment available.

Q: What is the difference between hot rolled and cold drawn flat bar?
A: Hot rolled flat bar has low cost for general structure use; cold drawn flat bar owns higher dimensional accuracy and smooth surface for precision machined parts.
Q: Can you process chamfer and punching on flat steel bar?
A: Yes, we provide edge chamfering, fixed hole punching, surface grinding and custom shaping service per client drawing requirements.
Q: What international standards can your flat bar meet?
A: Comply with EN10025, ASTM A36, JIS G3101, GB/T704 standards, all pass third-party import inspection.
Q: What anti-rust treatment can you provide?
A: Default oil anti-rust, customized spray anti-rust paint and sealed plastic film packing are optional for humid overseas destination.