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HG785属于高强度焊接结构钢。785指钢板的抗拉强度约为785Mpa，D指钢板的质量等级；常见的钢板质量等级分别为A、B、C、D、E。D级钢板的冲击为﹣20°C。HG785D钢板具有较高的屈服强度和抗拉强度，被广泛应用于煤矿机械、矿山机械、等大型钢结构件；如矿用液压支架、起重机。
产地：武钢
交货状态:调质
执行标准：WJX（ZB）07-2008
HG785D钢板出厂实物进行检验时抗拉、屈服值都略高于标准值100Mpa. HG785D超声波探伤 如需对钢板做超声波探伤，需在合同中注明，否则不作此项检测验收。 检验标准按JB-4730《锅炉、压力容器及压力管道无损检测》进行逐张超声波探测。 钢板按符合I级或II级验收。
HG785D化学成分（wt%）
|
成分
|
C
|
Si
|
Mn
|
P
|
S
|
Ni
|
Cr
|
Mo
|
Nb
|
Ti
|
B
|
|
HG785D
|
≤0.12
|
≤0.40
|
≤1.8
|
≤0.025
|
≤0.015
|
≤0.75
|
≤0.70
|
≤0.50
|
≤0.060
|
≤0.020
|
≤0.0020
|
2HG785力学性能
|
|
|
牌号
|
检测项目
|
结果描述
|
结果或测定值
|
|
HG785D
|
Rp0.2
|
Mpa
|
≥685
|
|
Rm
|
Mpa
|
≥785
|
|
|
A50
|
%
|
≥15
|
|
|
180°冷弯
|
d=3a
|
完好
|
|
|
﹣20°C冲击功
|
J
|
47
|
Origin: Wuhan Iron and Steel
Delivery condition: quenched and tempered
Executive Standard : WJX (ZB) 07-2008
HG785D steel factory in kind when tested tensile, yield values are slightly higher than the standard value of 100Mpa. HG785D do ultrasonic testing for ultrasonic testing of the plate , to be specified in the contract , or not to make such testing and acceptance . Inspection standards by JB-4730 " boilers, pressure vessels and pressure piping NDT " by- Zhang ultrasonic detection . Steel plates meet Class I or Class II acceptance.
HG785D chemical composition (wt%)
Composition C Si Mn P S Ni Cr Mo Nb Ti B
HG785D ≤ 0.12 ≤ 0.40 ≤ 1.8 ≤ 0.025 ≤ 0.015 ≤ 0.75 ≤ 0.70 ≤ 0.50 ≤ 0.060 ≤ 0.020 ≤ 0.0020
2HG785 mechanical properties
Grade test results, or results of the project described in the measured value
HG785D Rp0.2 Mpa ≥ 685
Rm Mpa ≥ 785
A50% ≥ 15
180 ° cold d = 3a intact
-20 ° C Impact energy J 47
