Hot-rolled or forged stainless steel bars of round, square, flat and hexagonal section, supplied annealed and pickled, peeled or turned. They are the stock material for machined parts, shafts, fasteners, fittings, brackets and fabrications in every grade from 304 to duplex.
Also called
Stainless round bar
SS round bar
Stainless flat bar
Stainless hex bar
Stainless square bar
Black bar
Hot rolled stainless bar
AR
قضبان من الفولاذ المقاوم للصدأ (مستديرة ومسطحة وسداسية)
ZH
不锈钢棒材（圆钢、扁钢、六角钢）
DE
Edelstahl-Stabstahl (Rund-, Flach-, Sechskantstahl)
FR
Barres en acier inoxydable (rondes, plates, hexagonales)
ES
Barras de acero inoxidable (redondas, pletinas, hexagonales)
IT
Barre in acciaio inossidabile (tonde, piatte, esagonali)
Stainless bars are rolled from billets on bar mills, then solution-annealed (austenitic grades) or annealed or hardened and tempered (martensitic grades), and descaled by pickling. In that 'black' or 1D condition they carry a rough surface and the rolling tolerances; for machining they are often peeled or turned to remove the surface layer, and the most precise bars are drawn or ground as bright bar. Large rounds are forged rather than rolled.
Rounds are the bulk of the trade — the raw material for machined shafts, bolts, valve stems and fittings. Flats are used for brackets, base plates, cutlery and fabrication; hot-rolled flats have slightly rounded edges, while flats cut from plate (sometimes called sheared or cut flats) have square edges and come in widths the bar mills do not roll. Hexagons feed nut and fitting production, and squares are used for keys and machined blocks.
Two American standards are used side by side: ASTM A276 for general-purpose bars and ASTM A479 for bars for boilers and pressure vessels, which adds mechanical-property and heat-treatment requirements — oil, gas and process plant usually ask for A479. In Europe EN 10088-3 covers general purposes and EN 10272 pressure purposes.
GCC stockists hold large ranges of 304L and 316L bar for the oil and gas, desalination, food, marine and construction industries, with 2205 duplex and 17-4PH for higher-strength parts. Bar is imported, mainly from India, China, Europe and Korea.
Forms & sizes
Bar is ordered by shape and size, grade, condition and surface, and length. The steel weight calculator gives the mass of any size.
Rounds
5–250 mm hot rolled; larger sizes forged; peeled, turned or bright to order
Squares
6–150 mm hot rolled or forged
Flats
Hot rolled 3–25 × 10–150 mm; cut-from-plate flats in any thickness up to about 100 mm
Hexagons
Typically 6–100 mm across flats, hot rolled or drawn
Condition
Solution annealed and pickled (austenitic), annealed or quenched and tempered (martensitic)
Steel Mills - Agents & Traders · Stockist - Distributor · Other Steel Users · Sharjah
