What is AS3678-300 steel plate

What is AS3678-300 steel plate

1. Introduction to AS3678-300 Australian steel garde:

For AS3678-300 Australian grade, AS3678 is the Australian standard AS-NZS 3678-2011, 300 represents the minimum yield strength value. AS3678-300 grade is in the Australian low alloy standard, corresponding to the Chinese grade Q345B, but its composition performance is not equivalent to Q345B.

2. AS3678-300 steel plate technical standard: AS-NZS 3678-2011

3. AS3678-300 steel plate heat treatment process: hot rolling, normalizing, tempering, normalizing + tempering, quenching and tempering.

4. AS3678-300 steel plate chemical composition melting analysis:

Grade C Si Mn P S Cr Ni Cu Mo Al Ti CE
AS3678-300 ≤0.22 ≤0.55 ≤1.70 ≤0.04 ≤0.030 ≤0.30 ≤0.5 ≤0.40 ≤0.10 ≤0.100 ≤0.04 ≤0.44

5. Mechanical properties of AS3678-300 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
AS3678-300 320 310 300 280 280 270 260 430 21

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 applies to both acid-soluble aluminum and all-aluminum.
(4) The carbon equivalent CE is based on the actual smelting composition or finished product composition value, 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%.