WYJ054-2006                    WQ690D(WH80Q)

1, suitable for:

The technology conditions apply to no more than 80 mm thickness of WQ690D (WH80Q) steel plates.

Steel used in manufacturing requirements good weldability of coal mine of hydraulic support, heavy vehicles, engineering machinery and other steel structure.

2, size, shape, weight and allow deviation

The steel plate size and shape, weight and deviation should be allowed to meet the provisions of GB/T709.

3, chemical composition (melting analysis)

The chemical composition of steel (melting analysis) should be in accordance with table 1.

Table 1            wt，%

note：（1）The supplier can be added other trace elements。

（2）Ceq≤0.60％ 

Ceq calculation formula：

Ceq（％）＝C+Mn/6+(Mo+Cr+V)/5+(Ni+Cu)/15

4、mechanical property

The mechanical properties of the steel plate test results should comply with the provisions of the table 2table 2

5、delivery status ：qenching and tempering。