Certificates

WYJ037-2005                      WDB690

1, applicable scope :

The technology conditions apply to no more than 50 mm thickness of WDB690 steel plates.

2, technical requirements

2.1 chemical composition (melting analysis, wt %)

Table 1

 

C	Si	Mn	P	S	Mo	Nb	Ti	B	Ni	Cu
≤0.07	≤0.50	≤1.70	≤0.020	≤0.010	≤0.40	≤0.10	≤0.04	≤0.003	≤0.70	≤0.90

 

Note: (1) the supplier can be added other trace elements. Provide Ceq value and Pcm value.

(2) Ceq formulas for the Ceq (%) = C + Mn / 6 + (Mo + Cr + V) / 5 + (Ni + Cu) / 15

(3) Pcm computation formula is

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

2.2 mechanical properties

Table 2

 

Thick (mm)	Rp0.2(MPa)	Rm(MPa)	A50(%)	Cold bend180°
≥12～16	≥590	≥690	≥15	d=3a
＞16～35	≥570	≥670	≥15
＞35～50	≥550	≥650	≥15

 

2.3 steel shouldbe rolled by piece and inspection mechanics and process performance.

2.4 delivery status: controlled rolling or tempering.