WYJ035-2002                      WDB690

1. The applicable scope

The technology conditions apply to more than 40 mm thickness of WDB690 steel plates.

2. Technical requirements

2.1 chemical composition (melting analysis, Wt %)

Chart 1

 

C	Si	Mn	P	S	Mo	Nb	B	Ni	Cu
≤ 0.07	≤ 0.50	≤ 1.80	≤0.020	≤0.010	≤ 0.50	≤ 0.08	≤0.003	≤ 0.70	≤ 1.10

 

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

2.2 mechanical properties

Chart 2

 

Brand	σs MPa	σb MPa	δ50 ％	-40℃AKV （纵）J	冷弯 180℃
WDB690	≥580	≥670	≥18	≥47	d＝3a

Note: (1) using 200 mm standard samples from, measuring 50 mm standard from the elongation of the inside.

(2) AKV-three sample frequency 47 J is average for qualified, if not at the beginning of the check, allowing the review,,According to the three review of average as judgement basis.

2.3 delivery status: controlled rolling and tempering