High strength steel Q235A carbon steel plate sheet price

Q690D grade is a low-alloy high-strength structural steel, belonging to the structural steel category. Q690D steel plate executive standard: GB/T16270-2009. Q is the expression of yield strength, 690 is its lower limit yield value, and D is its grade. This grade also has a higher yield strength and tensile strength. Q690 series grades also include Q690C, Q690D, Q690E, Q690F. Delivery status of steel Q235A carbon steel plate sheet: It should be delivered in quenched and tempered state. In addition, this grade can be delivered according to some special requirements of customers, but it should be indicated in the contract.

The effect of nitrogen on steel performance is similar to that of carbon and phosphorus. With the increase of Q235A carbon steel plate sheet 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 Q235A carbon steel plate sheet steel, can be used as an alloying element of low alloy steel.

The quality of Q235A carbon steel plate sheet shall not only meet the requirements of the standard, but also be higher or stricter than the product characteristics specified in the standard, including chemical composition, structure, physical properties, chemical properties and other requirements of Q235A carbon steel plate sheet buyer, such as packaging, delivery time, etc.. On the basis of the quality of Q235A carbon steel plate sheet in line with the corresponding standards, some buyers will put forward specific requirements according to their own use requirements, which is called technical agreement. That is, some specific factors should be met according to the buyer's requirements.

The increase in China's Q235A carbon steel plate sheet and so on steel production will provide strong support for iron ore prices in the second quarter. According to the latest Outlook Survey of S&P Global Platts, despite the slow recovery of downstream steel demand, iron ore prices should be strongly supported in the second quarter as Chinese steel mills are expected to increase steel production.