1,ASTM 4340 Alloy Steel Flat Bar 2,Thickness:10~90mm 3,Width ... :60~610mm 4,Length:4m~6m 5,ISO9001 2000 Sichuan Liaofu Special Steel ... or at the customers' requirements Sichuan Liaofu Special Steel Trading Co., Ltd.Alloy strctural steel1, Grade: AISI ... J/cm2): ≥98(10) Hardness: ≤269HBCharacters:1, tensile steel round bar2, high strength3, high toughness Application: used for ...