| Customization: | Available |
|---|---|
| After-sales Service: | 24 Hours 7 Days |
| Warranty: | 10 Years |
|
Still deciding? Get samples of US$ 200/Piece
Request Sample
|
Suppliers with verified business licenses
Audited Supplier Audited by an independent third-party inspection agency
Low-alloy steel is a type of steel that includes small amounts of additional metals to enhance its properties. Typically, these alloying elements make up between 1% and 5% of the steel's composition. The purpose of these additions is to improve the steel's mechanical qualities, such as strength and durability, and to help it resist corrosion. This type of steel is designed to offer better performance in various applications compared to plain carbon steel.
Low-alloy steel is used in various industries due to its enhanced properties. It's commonly found in:
The alloying elements in low-alloy steel, such as carbon (C), manganese (Mn), chromium (Cr), nickel (Ni), molybdenum (Mo), vanadium (V), and silicon (Si), usually make up less than 10% of the steel. Accurate analysis of these elements is crucial for ensuring quality and maintaining competitiveness in the market.
High-strength, low-alloy (HSLA) steel, a subset of low-alloy steel, is designed to meet specific mechanical requirements. It's used in applications like warships, structural steel, and heavy machinery.
Steel grades such as ASTM A514, A517, and T1 are treated to enhance strength and toughness, making them suitable for heavy equipment and pressure vessels. Meanwhile, weathering steels like ASTM A242, A588, and A709 Grade 50W develop a protective layer that resists rust and gives a distinctive weathered appearance, often used in artistic and architectural applications.
Low-alloy steel offers greater strength compared to standard carbon steel. While carbon steel typically has a yield stress of 235 MPa, low-alloy steel can handle 345 MPa. This means you can use a thinner section of low-alloy steel while maintaining the same strength, allowing for lighter and more efficient designs. Advanced processes like critical annealing and rapid cooling can further enhance its shape-forming capabilities, with yield stresses ranging from 310 to 345 MPa.
Welding low-alloy steel is generally straightforward, but its properties depend on its composition. Most low-alloy steels weld well, but those with high carbon or manganese content might require special techniques. For example, pre-heating or using low-hydrogen electrodes can help prevent issues. In some cases, a hydrogen-free electrode is necessary, regardless of the steel's thickness.
High-strength low-alloy steel is designed for strength and reduced cross-section, making it lighter and cost-effective. However, with a thinner section, corrosion resistance becomes more critical. To enhance durability, low-alloy steels can be coated to resist rust. Elements like copper, phosphorus, silicon, chromium, nickel, and molybdenum can also improve corrosion resistance, ensuring longevity and reliability in various applications.
| Low Alloy Steel Plates (Grade:Q345/16Mn/St52) | |||
| Thickness(mm) | Width(mm) | Length(mm) | |
| Hot Rolled Plates | 3.0 4.0 6.0 8.0 10.0 12.0 14.0 16.0 18.0 20.0 25.0-60.0 |
1250-2500 1500/1800/2000/2200/2500 1500/1800/2000/2200/2500 1500/1800/2000/2200/2500 1500/1800/2000/2200/2500 1500/1800/2000/2200/2500 1500/1800/2000/2200/2500 1500/1800/2000/2200/2500 1500/1800/2000/2200/2500 1500/1800/2000/2200/2500 1500/1800/2000/2200/2500 |
2500/3000/Random Length 6000/8000/Random Length 6000/8000/Random Length 6000mm-12000mm 6000mm-12000mm 6000mm-12000mm 6000mm-12000mm 6000mm-12000mm 6000mm-12000mm 6000mm-12000mm Random Length |
| Hot Selling Sizes | (4-8)mm*1500*3000/6000mm; (12-20)mm*1500mm*6000mm; | ||
| Other Common Sizes | 1219*2438; 1220*2440; 1500*3000; 1500*6000; 2438*6096; 2438*9143; etc. | ||
| Can be customized, cut, or processed according to customers' requirements | |||
| Application | Widely used in the field of bridges, vehicles, ships, buildings, pressure vessel | ||
| Weight Calculation | Weight(kg)=Thickness(mm)*Width(m)*Length(m)*Density(7.85g/cm3) | ||
| Chemical Composition | |||
| Q345A | C≤0.20, Mn≤1.70, Si≤0.50, P≤0.035, S≤0.035 | ||
| Q345B | C≤0.20, Mn≤1.70, Si≤0.50, P≤0.035, S≤0.035 | ||
| Q345C | C≤0.20, Mn≤1.70, Si≤0.50, P≤0.030, S≤0.030, Al≥0.015 | ||
| Q345D | C≤0.18, Mn≤1.70, Si≤0.50, P≤0.030, S≤0.025, Al≥0.015 | ||
| Q345E | C≤0.18, Mn≤1.70, Si≤0.50, P≤0.025, S≤0.020, Al≥0.015 | ||
| Q345A,B,C,D,E all contain Nb≤0.07, V≤0.15, Ti≤0.20, Cr≤0.30, Ni≤0.012, Mo≤0.10 | |||
){kind=link}