Introduction of S355G8+M steel plate

1. S355G8+M steel plate delivery status: hot rolling, TMCP.

2. Technical standard for S355G8+M steel plate: EN10225-2009.

3. Chemical composition of S355G8+M steel plate:

Grade C Si Mn P S Ni Cr Mo Cu
S355G8+M ≤0.14 0.15-0.55 1-1.65 ≤0.02 ≤0.007 ≤0.5 ≤0.25 ≤0.08 ≤0.3
Nb V Ti Alt N B Ca Pb Ceq Max Pcm Max
≤0.04 ≤0.06 ≤0.025 0.015-0.055 ≤0.010 ≤0.0005 ≤0.005 ≤0.010 ≤0.43 ≤0.24

Composition remarks: As, Sn, Pb, Bi, Ca and B are residual elements; Cr+Mo+Ni+Cu≤0.9; Nb+V≤0.06; Nb+V+Ti≤0.08; Alt/N≥2; As≤0.03; Sn≤0.02; Bi≤0.01. Ceq=C+Mn/6+(Cr+Mo+V)/5+(Ni+Cu)/15, Pcm=C+Si/30+(Mn+Cu+Cr)/20+Ni/60+Mo/15+V/10+5B

4. Mechanical properties of S355G8+M steel plate:

Tensile strength Mpa

Lower yield strength of corresponding thickness (mm), MPa

Elongation A%

Impact energy

Thk≤100mm ≤16 16-25 25-40 40-63 63-100 Temperature ℃ Energy J
S355G8+M 470-630 355 355 345 335 325 22 -40 50

5. Dimension, quality and deviation of S355G8+M steel plate:
The size and deviation of steel plate shall be in accordance with one of the following relevant European standards and further provisions in the following conditions: EN10024, EN10029, EN10034, EN10055, EN10056-2, EN10067, EN10210-2 and EN10279.

Unless an agreement is reached on the thickness of the steel plate, it shall be in accordance with EN10029A.

For the corrugated strip with a distance of less than 2m (between peaks), the following evaluation criteria apply:
1) In any case, the flatness deviation of the upper surface of the steel plate shall be measured on the horizontal surface;
2) Within 2m straight edge, the upper limit depth of ripple is 5mm. The average depth of corrugation on a steel plate shall not exceed 4mm;
3) The minimum depth forming the ripple is 2mm;

Density of steel: the density used to measure the mass is 7.85g/cm3

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