EN 10025-2 Non-alloy structural steels
Standard EN 10025-2: "Non-alloy structural steels" defines conventional structural steels in three yield strength classes 275/355/420 MPa. Ruukki manufactures all steel grades as cut lengths and heavy plates.
Marking "N" for a steel grade refers to the delivery state: either normalized in furnace of normalized rolled. Marking "AR" means that the delivery state is hot-rolled.
Physical properties, tensile strength vs. hardness