In addition to the required yield strength, tensile strength and elongation, KR AH32 marine steel also requires its toughness (AKV value) at low temperatures. In addition, KR AH32 marine steel also needs to have good weldability.
If the KR AH32 marine steel has a high carbon content and contains alloying elements that increase the hardenability, it is easier to cause hardening and quenching, and due to the effect of phase transformation stress and thermal stress, the welding of KR AH32 marine steel cracks easily occur at the seam.
Therefore, in order to produce cracks, it is necessary to reduce the carbon content of KR AH32 marine steel, and appropriately select the types of alloying elements and control their content.
