What is the scope of appearance inspection of ABS EH40 container ship steel

The effect of nitrogen on steel performance is similar to that of carbon and phosphorus. With the increase of ABS EH40 container ship steel nitrogen content, the strength of steel can be improved, plasticity especially toughness can be significantly reduced, weldability becomes worse, and cold brittleness is intensified. Nitrogen with aluminum, niobium, vanadium and other elements can reduce its adverse effects, improve the performance of ABS EH40 container ship steel steel, can be used as an alloying element of low alloy steel.

API 2H gr50 is carburized steel, which is usually low carbon steel with carbon content of 0.15% - 0.24%, and is used for offshore platform structure. API 2H gr50 steel is suitable for surface carburizing and hardening treatment, with good workability, small deformation and good fatigue resistance. ABS EH40 container ship steel, API 2H gr50 steel is used for making hull, offshore oil production platform, platform pipe joint and other structural parts.

Hyundai Steel Co. has no plans to cut production further despite weak steel demand due to the coronavirus pandemic, the company's president said. Earlier this year, South Korea's second largest steelmaker reduced its ABS EH40 container ship steel annual production of hot rolled coils from 1 million tons previously to 700 thousand tons per year for EAFs. A turnaround is expected after the third quarter of this year.

The company's ESP thin gauge is down to 0.6mm. The thinner the thickness of the ABS EH40 container ship steel, hot rolled steel product, the more difficult it is to roll. The thickness will encounter increased load, severe vibration of the rolling mill, difficult shape control, and fluttering of the head during the downdraft. There are many problems such as difficulty in getting bite, which limit the thinnest size that can be rolled by hot rolling. At present, the thinnest gauge of conventional rolling line is 1.2mm, and the thinnest gauge of CSP production line is about 1.0mm. The successful rolling of 0.6mm hot rolled steel product is a milestone in hot rolled steel strip technology.