1566 spring steel bar/rod


Standards:ASTM A29

Steel mill: SHOUGANG

Size: Out diameter: 1.0-200mm

Length: 2500-6000mm

Delivery condition: Quenching, Tempering

ASTM1566 is one of the most commonly used manganese-carbon spring steels, with large hardenability and small decarbonization tendency. It has good machinability and relative machinability of 70% in the annealing state, but it is sensitive to overheating, easy to produce quenching cracks and temper brittleness, has been used for all kinds of small size flat, round spring, seat spring, valve spring, clutch spring, brake spring, etc. It is also the main material for making a diamond circular saw blade.


1566 Equivalent Material

1566 1566(1066) 65Mn


AISI 1566 Chemical Composition

Former designation C Mn P S
1066 0.60–0.71 0.85–1.15 0.04 0.05


AISI 1566 Mechanical Property

Tensile Strength, Ultimate Yield Strength, proof Elongation at break Brinell Hardness
980 MPa 785 MPa 10 % 192


Wiho is a fully stocked and leading metal manufacturer, supplier, exporters, distributors of steel mill-product in the form of 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 1566, AISI 1566, SAE1566(65Mn) round bar used for 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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