Why is SA573 Grade 70 steel grade more expensive?

The company is committed to providing customers with high-quality and low-cost SA573 Grade 70 steel grade steel products as the goal, striving to create value for customers as its own responsibility. With advanced Kaiping processing equipment and strong logistics distribution system, the company can meet the needs of customers at any time. The company has the advantages of SA573 Grade 70 steel grade complete specifications, low price and fast distribution, With the service concept of keeping promise and valuing quality, it has won the trust and unanimous praise of the majority of users. The scale and strength of the enterprise is in the forefront of domestic metal material business units.

Q355GNH weathering steel: Q——The first letter of the Chinese pinyin of "Qu" in the yield strength;
355——The lower limit of the lower yield strength of steel, in N/mm²;
GNH——respectively the first letter of "Gao, Nai, Hou" Chinese Pinyin;
Quality grades are divided into A, B, C, D, E
(1)Q355GNH executive standard: GB/T 4171-2008
(2)Q355GNH smelting method: the steel is smelted by converter or electric furnace, and it is killed steel.

Compared with SA573 Grade 70 steel grade, ordinary steel plate, ship plate has better resistance to wind and wave. In the ocean, there are often big winds and big waves. If the performance advantage of ship plate is not prominent, it is easy to be damaged by big waves. The service life of ship plate is longer than that of ordinary steel plate. Because of its excellent performance, the ship plate can be used for a long time. Some waste ships can remove the ship plate for recycling. The price of ship plate is higher than ordinary steel plate.

The strengthening mechanisms in metals mainly include solid solution strengthening, dislocation strengthening, fine grain strengthening, and second phase (precipitation and dispersion) strengthening. Alloying elements have the most significant strengthening effect on steel in the quenched and tempered state, because it makes full use of all four strengthening mechanisms. Martensite is formed during quenching, and carbides are precipitated during tempering, resulting in a strong second phase strengthening and greatly improving toughness. Therefore, obtaining martensite and tempering it is the most economical and effective comprehensive strengthening method for SA573 Grade 70 steel grade.

Chemical composition of SA573 Grade 70 steel grade, Q345D steel plate: C: ≤0.18; Si: ≤0.50; Mn: ≤1.70; P: ≤0.030; S: ≤0.025; Nb: ≤0.07; V: ≤0.15; Ti: ≤0.20; Cr: ≤0.30; Ni: ≤0.50; Cu: ≤0.30; N: ≤0.012; Mo: ≤0.10; Als: ≥0.015. Yield strength (MPa) of Q345D steel plate: ≤16mm: ≥345; 16-40mm: ≥335; 40-63mm: ≥325; 63-80mm: ≥315; 80-100mm: ≥305; 100-150mm: ≥285; 150-200mm: ≥275; 200-250: ≥275; 250-400: ≥265. Tensile strength of Q345D low alloy steel: 450-630(MPa). Elongation: ≥21. Impact test: -20 ℃: ≥34.

We have a professional production team and high-quality production equipment, and we also have a great SA573 Grade 70 steel grade advantage in price, with its own factory, large-scale production to reduce the price. Strictly control each production line to ensure the SA573 Grade 70 steel grade production of high-quality steel plates, steel pipes and other products that meet customer requirements.

To provide customers with the most satisfactory service and realize the win-win of economic and social benefits, our company promises to provide excellent SA573 Grade 70 steel grade products in this bidding, and in line with the attitude of being serious and responsible to customers, before sending goods to users, the SA573 Grade 70 steel grade technical personnel shall confirm that there is no fault in the equipment before sending goods to users, and then send goods and products to users, and formulate the following service terms.