Corten B is a weather resistant steel which is better suited for heavy and load bearing structures.
The material forms its own protective layer when exposed to atmospheric elements. Essentially, the top layer corrodes which then protects the steel beneath it. The natural finish does not normally require any form of maintenance such as painting, which makes the material a highly cost effective alternative to other structural steels.
Painting and maintenance will be required if the structure is is continually wet as a protective layer will not form. An good example is where the base of the structure meets with the ground or is partially submerged.
The technical specifications of Corten B are outlined below.
Corten B - Grades and Equivalents
The grades and equivalents of Corten B are given in the following table.
| Corten |
EN 10025-5:2004
|
| Corten B |
S355J2W
|
Corten B - Chemical Composition
The chemical composition of Corten B are mentioned in the following table.
| Element |
% by mass
|
Element |
% by mass
|
| C |
0.19
|
Al |
0.020/0.06
|
| Si |
0.30/0.65
|
V |
0.02/0.10
|
| Mn |
0.80/1.25
|
Cu |
0.25/0.40
|
| P |
0.035
|
Cr |
0.40/0.65
|
| S |
0.030
|
Ni |
0.40
|
Maximum values unless otherwise stated
Corten B - Mechanical Properties
The mechanical properties of Corten B are provided in the following table.
| Grade |
Thickness (mm)
Strip Products
|
Plate Products
|
Yield Strength
Rel N/mm²
Minimum
|
Tensile Strength
Rm N/mm²
Minimum
|
Elongation
A50 %
Minimum
|
| Corten B |
2 – 13
|
6 – 40
|
345
|
485
|
19
|
(Please note: the technical information above is for guidance only – for exact specifications please check with Masteel)
This information has been sourced, reviewed and adapted from materials provided by Masteel UK Ltd.
For more information on this source, please visit Masteel UK Ltd