Certificates

WYJ023-2006                          WH80Q

1. applicable scope :

The technology conditions apply to no more than 120 mm thickness of WH80Q steel plates.

WH80Q steel used in manufacturing requirements good weldability of coal mine of hydraulic support, heavy vehicles, engineering machinery and other steel structure.

2. The 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 the steel plate (melting analysis) should be in accordance with table 1.

Table 1           Wt％

 

C	Si	Mn	P	S	Mo	Nb	B	Ni	Cr	Ti	V
≤0.15	0.15～0.50	0.80～1.80	≤0.020	≤0.010	≤0.60	≤0.07	≤0.003	≤1.20	≤0.80	≤0.03	≤0.08

注：1）The supplier can be added other trace elements

2）Ceq≤0.55%     

Ceq calculation formulate

Ceq(%)＝C+Mn/6+(Mo+Cr+V)/5+(Ni+Cu)/15

3）Pcm≤0.30％   

 Pcm calculation formulate

Pcm(％)＝C+Si/30+Mn/20+Cu/20+Ni/60+Cr/20+Mo/15+V/10+5B

4. mechanical property

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

Table2

 

specification mm	Rp0.2 （MPa）	Rm （MPa）	A ％	AKV（lengthways）		cold bend
				temperature ℃	J
≤50	≥685	≥760	≥12	－20	≥34	d＝3a
＞50～120	≥665

 

Note: 1) no more than 80 mm according to table 2 to performance test and judgement.

2) > 80 ~ 120 mm provide delivery status and sample conditioning mechanical properties and thickness direction state, 1/2, 1/4 store surface hardness value, table 2 performance requirements for reference only.

5. Delivery status: ≤80mm，quenching and tempering

＞80～120mm，controled rolling.