Flat Bar

Flat-Bar

Table of Content

Flat bars are long, flat metal strips with a rectangular cross-section. They typically measure between 3/16” and 3” wide and 1/8” to 8” thick. Flat bars are available in various materials, including steel, aluminum, stainless steel, brass, and copper. The specific grade of the metal affects the flat bar’s strength and durability.

Flat bars are widely used in construction and engineering due to their versatility. They serve a range of applications across various industries, including automotive and architecture.

Types of Flat Bars

There are two main types of flat bars: hot-rolled and cold-rolled.

  • Hot-Rolled Flat Bars : These are made by rolling red-hot steel billets until they reach the desired width and thickness. The process can leave the edges slightly rounded due to the heat.
  • Cold-Rolled Flat Bars : These are produced by passing hot-rolled stock through rollers at room temperature. This method provides more precise dimensions and fewer imperfections compared to hot-rolled flat bars.

Benefits of Flat Bars

Flat bars offer several advantages compared to other metal materials:

  • Lightweight yet Strong: They provide reliable structural support without being overly heavy.
  • Customizable: Flat bars can be easily cut or bent to fit specific needs, making them convenient for custom projects.
  • Corrosion-Resistant: Many grades of flat bars resist corrosion, allowing them to withstand harsh weather conditions without rusting.

Flat bars are ideal for both home improvement and commercial construction projects due to their strength, light weight, and versatility.

What is a Flat Bar Used For?

Flat bars have a rectangular cross-section and are commonly used in:

  • Supporting floor joists
  • Braces and lintels
  • Frameworks for gates and fencing
  • Handrails
  • Structural frames
  • Brackets and support plates

Flat Bar Specification

Dimensions ASTM, ASME, API
Length Range 2 meters to 7 meters (8 feet to 24 feet)
Size Range 38×10 mm to 150×25 mm
Finish Bright, Black, Polish
Form Flat Bar
Condition Cold Drawn & Polished, Cold Drawn, Centreless Ground & Polished
Other Services Machining (CNC), Centreless Grinding (CG), Heat Treatment, Annealing, Pickling, Polish, Rolling, Forging, Cutting, Bending, Minor Fabrication
Flat Bars End Finish Sheared, Bansaw Cut, Hot-Cut with Grinding, Water Jet Cutting

Flat Bar Materials and Grades

Stainless Steel Flat Bar AISI 301, 302, 303, 304, 304L, 310, 316, 316L, 317, 321, 347, 410, 416, 420, 430, 431, F51, F53, F55, F44, UNS S21800, Alloy 20, 904L, PH13-8Mo, 17-4ph, 15-5ph, 17-7ph, PH15-7 Mo, 254Smo, Al-6XN, 654SMO, duplex 2205, duplex 2507, nitronic ferralium 255
Carbon Steel Flat Bar ASTM A105 / ASME SA105, ASTM A350 LF2, LTCS
Alloy Steel Flat Bar AISI 4130, 4140, 4142, 4145, 4150, 4320, 4330, 4340, 4350, 4620, 4820, 6150, 8620, 8630, 8822, 9310, 52100, HY80, HY100, 9315, 300M, Nitralloy 135M, 17-22A, 42CrMoA, EN19, SAE 4140, EN24
Nickel Alloy Flat Bar Nickel 200, Nickel 201, Monel 400, Monel K-500, Hastelloy C-22, Hastelloy C-276, Hastelloy C-2000, Hastelloy B, Nimonic 75, Nimonic 90, Nimonic 80A, Inconel 600, Inconel 601, Inconel 617, Inconel 625, Inconel 718, Inconel 725, Inconel X-750, Incoloy 800, Incoloy 800H, Incoloy 800HT, Incoloy 825, Incoloy 926, Incoloy 890, Incoloy 925, Incoloy A-286, Udimet 500, Rene 41, Waspalloy, Invar 36, Invar 42, Stellite 6B, Kovar Alloy
Titanium Flat Bar 6AL4V, Commercially Pure, Grade 2, Grade 7, Grade 12
Aluminum Flat Bar 2014, 2024, 2025, 2219, 2618, 3003, 5083, 6061, 7049, 7050, 7075, 7079, 7149, 7150, 7175

Flat Bar Sizes (All sizes in mm)

Supplied in the sizes
30 x 8 30 x 10 30 x 12 30 x 16 30 x 20 30 x 25
32 x 6 32 x 8 32 x 10 32 x 12 32 x 16 32 x 20
32 x 25 32 x 30 40 x 6 40 x 8 40 x 10 40 x 12
40 x 16 40 x 20 40 x 25 40 x 30 40 x 32 50 x 6
50 x 8 50 x 10 50 x 12 50 x 16 50 x 20 50 x 25
50 x 30 50 x 32 50 x 40 65 x 6 65 x 8 65 x 10
65 x 12 65 x 16 65 x 20 65 x 25 65 x 32 65 x 40
65 x 50 75 x 6 75 x 8 75 x 10 75 x 12 75 x 16
75 x 20 75 x 25 75 x 32 75 x 40 75 x 50 100 x 6
100 x 8 100 x 10 100 x 12 100 x 16 100 x 20 100 x 25
100 x 32 100 x 40 100 x 50 100 x 65 125 x 10 125 x 12
125 x 16 125 x 20 125 x 25 125 x 32 125 x 40 125 x 50
125 x 65 150 x 10 150 x 12 150 x 16 150 x 20 150 x 25
150 x 32 150 x 40 150 x 50 150 x 65    
Heat Treatment Soft Annealed + A Normalized + N Annealed for cold Shearing + S
  Hardening and Tempering + V Spheroidised Annealing + BG Isothermal Annealing + I
  Solution Annealed + AT As Rolled + AR Spherodized Annealed + AC
  Stress Relieved + SR Quenched and Tempered + QT Normalized and Tempered + NT
  Quenched and Double Tempered + QDT Treated to obtain a range of hardness + TH Spheroidised Annealing + GKZ
  Treated for ferrite-pearlite structure + FP        
Flats rolled black bar tolerance EN 10058 – 2003          
100% Ultra Sonic tested            
100% Crack tested            
Radioactivity Material free from radioactivity. Material not welded. Material free from mercury and toxic contamination.          
Anti-mix test 100% through spark test          
Length Upto 6200mm      

Types of Flat Bar

Stainless Steel Flat Bars

Stainless Steel Flat Bars

Alloy Steel Flat Bars

Alloy Steel Flat Bars

Carbon Steel Square Bars

Duplex Steel Flat Bars

Duplex Steel Flat Bars

Applications

Flat bars are versatile and used for various purposes, including:

  • Structural support beams
  • Architectural trim (window and door frames)
  • Grills and gates for ventilation
  • Foundations for projects like gazebos or sheds
  • Welding and furniture making
  • Decorative features like railings

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