Detailed introduction to A36 hot rolled flat bar

A36 hot rolled flat bar is a commonly used low-carbon steel, widely applied in construction, machinery manufacturing, bridges, steel structures, and various other fields. Its excellent weldability, formability, and machinability make it a popular choice for manufacturing engineering structures and load-bearing components.

Description

A36 hot rolled flat bar is typically produced from Q235 carbon steel or other low-carbon steel materials through a hot rolling process. Its surface is rough, bluish-gray in color, and has rounded edges. The length dimensions are imprecise, but it offers high tensile strength and good ductility. The primary chemical components include carbon (C), manganese (Mn), silicon (Si), sulfur (S), and phosphorus (P), with carbon content usually below 0.26%. Thanks to its excellent welding and processing properties, A36 hot rolled flat bar is commonly used in structural applications requiring strength and toughness.

Manufacturing process

Raw material selection: High-quality low-carbon steel (e.g., Q235 steel) is chosen as the primary raw material.
Heating: Steel billets are heated to high temperatures, typically between 1200°C and 1300°C, to ensure material plasticity.
Hot rolling: Heated steel billets are processed through rolling mills to form the desired flat bar shape. During rolling, the steel's grains are rearranged, improving its mechanical properties.
Cooling: Hot-rolled steel is naturally cooled on cooling beds. Cooling rates are controlled to ensure appropriate hardness and toughness.
Cutting and straightening: After cooling, the flat bars are cut to specified lengths and straightened to ensure linearity.
Surface treatment: Depending on customer requirements, A36 hot rolled flat bars may undergo surface treatments such as pickling, oiling, or galvanizing to prevent oxidation and corrosion.

Features

Good mechanical properties: A36 steel features high strength, excellent toughness, and good ductility, capable of bearing substantial loads.
Outstanding weldability: A36 steel is highly weldable and can be processed using various welding techniques, including arc welding and CO₂ gas shielded welding.
Ease of machining: It can be easily cut, stamped, drilled, and welded, suitable for diverse machining processes.
Moderate corrosion resistance: While unsuitable for prolonged exposure to strong acids or alkalis, A36 steel performs well against oxidation in conventional environments.
Excellent plasticity: A36 steel exhibits good plasticity during processing, enabling the creation of complex shapes.

Size:

Size	Length	Weight (lbs/ft)
1/8" x 1/2"	240.00"	0.213
1/8" x 5/8"	240.00"	0.266
1/8" x 3/4"	240.00"	0.319
1/8" x 3/4"	240.00"	0.372
1/8" x 1"	240.00"	0.425
1/8" x 1-1/4"	240.00"	0.531
1/8" x 1-1/2"	240.00"	0.638
1/8" x 1-3/4"	240.00"	0.744
1/8" x 2"	240.00"	0.850
1/8" x 2-1/2"	240.00"	1.060
1/8" x 3"	240.00"	1.280
1/8" x 3-1/2"	240.00"	1.490
1/8" x 4"	240.00"	1.700
1/8" x 4-1/2"	240.00"	1.913
1/8" x 5"	240.00"	2.125
1/8" x 6"	240.00"	2.550
1/8" x 8"	240.00"	3.333
1/8" x 10"	240.00"	4.250
1/8" x 12"	240.00"	5.000
3/16" x 1/2"	240.00"	0.319

Related products

A36 hot rolled steel plate: Similar to A36 hot rolled flat bar but used in broader applications, including construction, frames, and containers.
A36 structural steel: Includes A36 I-beams and angle bars, commonly used in building structures and engineering facilities.
A572 steel: A high-strength low-alloy steel often used in structural applications requiring higher strength, interchangeable with A36 steel.

Applications

Construction structures: Used in steel frames, bridge supports, and building frameworks.
Machinery manufacturing: Applied in producing machine parts, frames, and support brackets.
Steel structure engineering: Extensively used in steel construction projects as load-bearing beams and columns.
Transportation: Utilized in the frames and supporting structures of automobiles, railways, and ships.
Bridge construction: Used in the load-bearing and supporting structures of bridges.
Industrial equipment: Includes supporting structures and components for large-scale equipment.