HOT News

• Improper welding of X80 pipeline may cause cracks
• Brief introduction of API X52 pipeline steel
• The difference between PSL1 and PSL2
• Harm of inclusions in X70 pipeline steel
• API 5L pipeline pipe
• X52 steel plate surface quality standards that need to be met
• The basic production process of API 5L X60 pipeline steel
• The key to Q460D steel welding process
• What does the heat treatment of Q690 Steel include?
• Reasons for choosing Q690D steel

What is AS3678-400 steel plate

Posted:2022-01-12 09:57:15

1. AS3678-400 steel plate implementation technical standard: AS-NZS 3678-2011.

2. Introduction of AS3678-400 Australian grade:
AS3678-400 Australian low alloy steel plate, AS3678 means the Australian low alloy standard AS-NZS 3678, 400 means the minimum yield strength value.

3. Mechanical properties of AS3678-400 steel plate:

Grade	Yield Strength Rp0.2 MPa							Tensile Strength Rm(Mpa)	Elongation A%
	Thickness (mm)
	≤8	>8≤12	>12≤20	>20≤32	>32≤50	>50≤80	>80≤150
AS3678-400	400	400	380	360	360	360		480	18

4. Melting analysis of chemical composition of AS3678-400 steel plate:

Grade

C

Si

Mn

P

S

Cr

Ni

Cu

Mo

Al

Ti

CE

AS3678-400

≤0.22

≤0.55

≤1.70

≤0.040

≤0.030

≤0.30

≤0.5

≤0.40

≤0.35

≤0.100

≤0.040

≤0.48

Note: (1) The grades listed allow the use of modified sulfide steelmaking techniques.
(2)The maximum value of Cr+Ni+Mo should not exceed 1.00%
(3)The limit value is applicable to both acid-soluble aluminum and all-aluminum.
(4) The carbon equivalent CE is calculated according to the actual smelting composition or finished product composition value, and according to the following formula: CE=C+Mn/6+(Cr+Mo+V)/5+(Ni+Cu)/15
(5) Ni+V≤0.030% (6) V≤0.10%, Ni+V+Ti≤0.15%.