ASTM A709 Grade 50 steel is a kind of low alloy high strength structural steel for bridges building. ASTM A709 Grade 50 structural steel product is availabel in structural shapes, plates and bars, and quenched and tempered alloy steel for structural plates intended for use in bridges. Heat analysis shall be used to determine the percentage of carbon, manganese, phosphorus, sulfur, silicon, and copper for the required chemical composition.
A709 Grade 50 structural steel plates own minimum yield strength at 345Mpa. For the delivery condition of steel plate A709 Grade 50, As rolled,Control rolled,TMCP with or without accelerated cooling,or quenching and tempering is all ok. ASTM
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ASTM A709 Grade 50 Steel Plates Specification
Standard: ASTM A709
Grade: A709 Grade 50
Thickness: 8mm-300mm,
Width: 1500-4020mm,
Length: 3000-27000mm
Form: coils, foils, rolls, plain sheet, shim sheet,flats,bars,
Finish: Hot rolled plate (HR), Cold rolled sheet (CR), 2B, 2D, BA NO(8), SATIN (Met with Plastic Coated)
Hardness: Soft, Hard, Half Hard, Quarter Hard, Spring Hard etc.
Application: Bridge Steel
Heat Treatment:
For quenched and tempered A709 Grade HPS 50W, the heat treatment shall be performed by the manfuacturer and shall consist of heating the steel to not less than 1600℉[900 ℃ ], quenching it in water or oil, and tempering it at not less than 1100℉[590 ℃ ]. The heat-treating requirements shall be reported on the test certificates.
ASTM A709 Grade 50 structural steel lates furnished under this specification shall conform to the requirements of the current edition of Specification A6/A6M, for the specific structural product ordered, unless a conflict exists in which case this specification shall prevail.
