
扁钢介绍
牌号有201,202,303, 304, 304L, 316,316L, 321,430, 431,410, 416,420等
执行标准 ASTM A484,A246,A582,GB704,GB5215
定尺长度或倍尺长度的扁钢,其长度允许偏差应符合:
长度≤4m……………………0~+30mm
长度>4m~6m………………0~+50mm
长度>6m……………………0~+70mm
扁钢的弯曲度
普通级扁钢每米弯曲度不大于4mm,总弯曲度不大于交货长度的0.40%
较高级扁钢每米弯曲度不大于2.5mm,总弯曲度不大于交货长度的0.25%
扁钢的截面形状不正如图a、b、c、d,其最大允许尺寸(C值)应符合:
扁钢厚度≤5mm,C≤1mm
扁钢厚度>5mm~10mm,C≤厚度的20%
扁钢厚度>10mm,C≤厚度的15%,最大值为3.5mm
General Introduction of Flat Steel
Grade: 201,202,303, 304, 304L, 316,316L, 321,430, 431,410, 416,420 etc.
Standard: ASTM A484,A246,A582,GB704,GB5215
Length Tolerance of Flat Steel in Cut-length or Multiple length should be in accordance with
Length≤4m……………………0~+30mm
Length>4m~6m………………0~+50mm
Length>6m……………………0~+70mm
Warp of Flat Steel
General Level: Max Warp is 4mm/m, whole body’s Max Warp is 0.40% length.
Senior Level: Max Warp is 2.5mm/m, whole body’s Max Warp is 0.25% length.
Un-Vertical of Cross-section is as Picture a、b、c、d, the Max Allowable Size (C) should be in accordance with
Thickness≤5mm,C≤1mm
Thickness>5mm~10mm,C≤20% thickness
Thickness>10mm,C≤15%thickness,Max C is 3.5mm