ASTM A871/A871M TYPE II weathering resistant steel

ASTM A871 TYPE II is a kind of high tensile low alloy weathering resistant steel . ASTM A871/A871M is divided into four levels (I, II, III, IV) according to it's property of the weathering resistance.ASTM A871/A871M belongs to high tensile low alloy steel material, which usually used in the construction, building, bridge .... 

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ASTM A871 has atmospheric corrosion resistance so it can be used bare or unpainted for many applications.