51100 Ball Bearing Steel Bar


Standards: ASTM A29

Steel mill: BAOSTEEL/Dongbei Special Steel

Size: Round bar (Diameter): 0.50mm to 800mm

Square bar / Flat bar: 3mm to 800mm

Surface treatment: Brightness, black

Heat treatment: Hot Rolled, CR, Normalized, Quenched, TMCP.

AISI E51100- Ball bearing steel is a kind of high-carbon high chromium bearing steel with good performance and wide application. E51100 steel has higher wear resistance and hardenability than E50100 steel. After quenching and tempering, it has higher hardness, uniform structure, good wear resistance and high contact fatigue performance. It offers general cold machining plasticity and cutting performance, poor welding performance, as well as the formation sensitivity to white point, and temper brittleness tendency has been used for making steel balls with diameters of 13.5 — 25.4mm, taper rollers with diameters of 10.3 — 18.5mm, cylindrical rollers with diameters of 9.4 — 17.2mm and spherical rollers with diameters of 9.2 — 17.1mm.


E51100 Equivalent Material

E51100/51100 SUJ1 105Cr4(1.3503) 534A99 GCr9 ШX9


AISI 51100 Chemical Composition

C Mn Si P S Cr Fe
0.98 – 1.1 0.25 – 0.45 0.15 – 0.30 0.025 0.025 0.90 – 1.15 96.95– 97.72


AISI 51100 Mechanical Property

Tensile Strength Yield Strength Elongation Hardness,HB
650 – 880 350 – 550 8 – 25 179-207


Wiho is a fully stocked and leading metal manufacturer, supplier, exporters, distributors of steel mill-product forms such as plate, sheet, pipe, tubing, bar and rod. The steel products provide by us shall be fabricated from prime quality raw materials and is fully certifiable to industrial specifications like ASTM and ASME or other relevant standards. Wiho metals supply and stock a large inventory of ASTM E51100, AISI 51100, SAE51100(SUJ1/105Cr4(1.3503)/534A99/GCr9) round bar mechanical parts like gears, gear shaft, main axis, valve rods, bolts and nuts as well as forged knives blades. For more information on our extensive steel alloys inventory, please contact us or fill in the form below.

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