Hot Rolling and Flaw Detection of S235JR steel plate

Perhaps you know what kind of material S235JR is, but do you know any knowledge about hot rolling and flaw detection of S235JR?

Hot rolling of S235JR steel plate:
S235JR is usually delivered in hot-rolled state, while S235JR can produce several common finished forms such as wire rods, round bars, square steel, and steel pipes. In this article, the hot-rolled plate refers to S235JR steel plate. Generally speaking, the surface of hot-rolled plates is relatively rough, but they have good strength and toughness, that making them suitable for the requirement of strength and wear resistance.

Flaw detection of S235JR steel plate :
The flaw detection of S235JR steel plate should be carried out according to the European standard and the German flaw detection standard, or according to the flaw detection standard of national standard.

For flaw detection, national standard requires more strictly than the German and the European standard. So, the last two standards are commonly used for the flaw detection of S235JR steel plate with a thickness above 200mm. Thickness exceeding the testing range is considered as unqualified in the national standard , so we generally use the German standard for thick plates.