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牌号
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Fe690-2低合金结构钢热轧钢板
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中国ISC
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L03903
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对应标准
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GB /T 3274-2017
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碳素结构钢和低合金结构钢热轧钢板和钢带
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Hot-rolled plates, sheets and strips of carbon structural steels and high strength low alloy structural sheets
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品牌/供货源
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中国大陆-> 宝钢
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归类
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合金钢
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性能
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强度 低温韧性 焊接性
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标签
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热轧钢板和钢带 低合金结构钢
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说明
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性能特点
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综合力学性能好，焊接性、冷、热加工性能和耐蚀性能均好，具有良好的低温韧性。
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用途举例
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用于桥梁、船舶、锅炉、压力容器、石油储罐、桥梁、电站设备、起重运输机械及其他较高载荷的焊接结构件
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本标准适用于厚度不大于400mm的碳素结构钢和低合金钢热轧钢板和钢带
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Fe690-2化学元素成分含量(%)
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成分
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C
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Si
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Mn
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P
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S
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Cr
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Ni
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Cu
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Mo
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N
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Ti
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V
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Nb
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Al b
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最小值
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-
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-
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-
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-
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-
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-
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-
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-
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-
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-
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-
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-
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-
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0.015
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最大值
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0.2
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0.5
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1.7
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0.03
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0.03
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0.3
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0.5
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0.3
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0.1
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0.015
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0.2
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0.2
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0.07
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-
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钢的牌号和化学成分(熔炼分析)应符合GB/T 700和GB/T 1591的规定。
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b当采用全铝（Alt）含量表示时，Alt应不小于0.02%
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Fe690-2机械性能
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厚度(直径，边长）
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抗拉强度
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屈服点
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断后伸长率或延伸率
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t
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σb
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σs
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δ
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mm
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%
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t≤16
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490~650
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≥390
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≥20
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16<t≤40< td="">
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490~650
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≥370
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≥20
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40＜t≤63
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490~650
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≥350
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≥19
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63＜t≤80
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490~650
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≥330
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≥19
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80＜t≤100
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490~650
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≥330
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≥19
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100＜t≤150
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470~620
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≥310
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≥18
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1、力学性能：
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①厚度小于3mm的钢板和钢带的抗拉强度和断后伸长率应符合GB/T 700、GB/T 1591的规定，断后伸长率允许比GB/T 700或GB/T 1591的规定降低5%(绝对值)。根据需方要求，钢板和钢带的屈服强度可按GB/T 700、GB/T 1591的规定。
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②厚度不小于3mm的钢板和钢带的力学和工艺性能应符合GB/T 700、GB/T 1591的规定。
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2、工艺性能：
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钢板和钢带应做180°弯曲试验，试样弯曲压头直径应符合GB/T 700、GB/T 1591的规定。如供方能保证冷弯试验合格，可不作检验。
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