DIMENSIONS

Plate
plate
products
Plate
There are a variety of international specifications for hot rolled steel plate. Some of the more common specifications and grades, with their chemical and
mechanical properties, are summarised below.
The chemical compositions are all the maximum % content. The mechanical properties relate to 12-20mm thick plates. This data is for comparison
purposes only and should not be used in lieu of the actual specifications, which should always be consulted.
Mild Steel
Medium strength structural steel plate with a nominal yield strength of 250 MPa
Min
Elongation
Tensile
Strength
Yield
Strength
Chemical Composition %
C Si Mn P S CE
AS/NZS 3678 Grade 250 0.22 0.55 1.70 0.040 0.035 0.44 250 MPa 410 MPa 22%
JIS G3101 SS400 0.050 0.050 245 MPa 400-510 MPa 17%
BS EN 10025 S275 0.18 1.50 0.040 0.040 0.40 275 MPa 410-560 MPa 22%
Medium Tensile
High strength structural steel plate with a nominal yield strength of 350 MPa
Min
Elongation
Tensile
Strength
Yield
Strength
Chemical Composition %
C Si Mn P S CE
AS/NZS 3678 Grade 350 0.22 0.55 1.70 0.040 0.035 0.48 350 MPa 450 MPa 20%
JIS G3101 SS540 0.30 1.60 0.040 0.040 400 MPa 540 MPa 13%
BS EN 10025 S355 0.20 0.55 1.60 0.040 0.040 0.45 355 MPa 490-630 MPa 22%
High Tensile
High strength structural steel plate with a nominal yield strength of 450 MPa. Not suitable for hot forming or normalising.
Min
Elongation
Tensile
Strength
Yield
Strength
Chemical Composition %
C Si Mn P S CE
AS/NZS 3678 Grade 450 0.22 0.55 1.80 0.040 0.035 0.48 450 MPa 520 MPa 16%
High Tensile Quenched & Tempered
High strength, low alloy steel plate with a yield stress three times that of carbon steel. Hardness 255HB.
Min
Elongation
Tensile
Strength
Yield
Strength
Chemical Composition %
C Si Mn P S CE
BISPLATE 80 0.18 0.20 1.40 0.010 0.003 0.50 690 MPa 790-930 MPa 18%
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Dimensions and Properties Handbook