S690QL chemical composition composition

Our 1810mm production line successfully rolled 1.2mm × 1250mm ultra-thin specifications S690QL high strength automotive steel, and the product quality and performance fully met the standards. In recent years, customers have become increasingly demanding for lightweight vehicles. Our company aims at the market and focuses on the development of thin-gauge high strength automotive S690QL chemical composition steel. The research and development personnel adjusted the product composition based on theoretical calculations and drawing on other experiences to meet customers' higher requirements for automotive steel yield strength and tensile strength.

The chemical composition of S690QL steel is a high-strength, low-alloy structural steel that is often specified for heavy manufacturing and construction applications. It contains a minimum of 0.20% carbon and up to 0.80% manganese, as well as other elements such as chromium, nickel, molybdenum, and vanadium, which contribute to its superior properties. Standard grade S690QL has a tensile strength of 800 MPa, yield strength of 590 MPa, and a hardness Brinell of 343 HBW. This steel is characterized by its excellent weldability, toughness, low-temperature toughness, and good fatigue strength. At room temperature, the chemical composition of S690QL steel includes: 0.20-0.30% Carbon, 0.80-1.20% Manganese, 0.015-0.035% Phosphorus, 0.010-0.040% Sulfur, 0.50-1.00% Nickel, 0.30-0.50% Silicon, 0.50-1.50% Chromium, 0.15-0.25% Molybdenum, 0.25-0.45% Vanadium, 0.10-0.50% Copper, 0.30-0.70% Aluminum, and 0.0015-0.0045% Nitrogen.

The company mainly supply S690QL structural steel plate, alloy steel plate, boiler plate, corten steel plates for railway, marine, automotive, home appliances, shipbuilding, construction, machinery manufacturing and oil tank projects. While accelerating the development of the main steel industry, the company adheres to a diversified development strategy and actively develops the other industry like household products, face mask machine, precision casting producing, steel structures, and heavy plates processing service.

S690QL steel has higher strength requirements than most standard grade steels. It is commonly used in applications where strength and durability are needed, such as construction and heavy machinery. This steel is ideal for applications that require higher load levels due to its superior fatigue strength and high yield strength. In terms of its microstructure, S690QL steel is composed of mostly ferrite and pearlite, with small amounts of martensite, bainite and carbide phases. Due to its high strength, the steel has better creep resistance and fatigue strength than most standard alloy steels. In terms of its physical properties, S690QLsteel is generally easier to form and weld than other steels due to its low carbon content and good weldability characteristics. It also has excellent toughness, even at low temperatures, and is characterized by its high thermal and electrical conductivity. In conclusion, the S690QL steel alloy is an excellent choice for applications requiring superior strength, weldability, and workability. As a high-strength, low-alloy structural steel, it can be used for a wide range of applications and offers superior properties for a variety of tough conditions.

In December, 2018, our Vietnam customer purchased 352 tons SA387Gr12Cl2 and S690QL steel plates for their tank fabrication project. The customer need those cargo urgently, and we keep many stock in warehouse , it only takes about 3days we collect total cargo for shipping to customer. The customer are very appreciate our quality and service. They S690QL chemical composition become our regular customer and repeat order to us every month.