GB Q420 E GB/T 1591
Low-Alloy High-Strength plate steel Product Introduction
GB Q420 E GB/T 1591 steel is primarily used in construction and shipbuilding, but is also uses in a variety of other applications, such as automotive parts and offshore structures. This steel can also be used in railways and wind power applications. Due to its excellent weldability, GB Q420 E GB/T 1591 steel is often used in industrial piping, storage tanks, and pressure vessels. The high strength to weight ratio of this steel makes it suitable for weight saving designs.
Our company has steel products billets, steel products, hot-rolled sheets, cold-drawn sheets, seamless steel pipes, steel bars and other products. GB Q420 E GB/T 1591 has a good reputation in the market, high-quality products, and thoughtful service in the steel industry. GB Q420 E GB/T 1591 has complete specifications, and the products are widely used in aerospace, petrochemical, and construction projects, with low requirements for products, easy processing and low dimensional accuracy requirements. And provide cutting, bending, welding, drilling, and other processing services.
Application: Low alloy high strength structural steel.
Heat treated: 1376°C - 1686°C.
Low-Alloy High-Strength plate Product Details
GB Q420 E GB/T 1591 Chemical Element
The main alloying elements in GB Q420 E GB/T 1591 steel are manganese and silicon. These elements are essential to creating the desired tensile strength and yield strength of the material. Manganese is used in the steel to increase strength, hardness, and wear resistance of the material. Silicon increases the electrochemical stability and weldability of the steel. Other trace alloying elements may also be added in small amounts for various purposes.
What is the chemical composition of GB Q420 E GB/T 1591? For GB Q420 E GB/T 1591 element content, please contact us.
| Element | Min | Max | Similar |
|---|---|---|---|
| Al | 0.0150 | - | - |
| Mo | - | 0.2000 | - |
| N | - | 0.0150 | - |
| Cu | - | 0.3000 | - |
| Ni | - | 0.8000 | - |
| Cr | - | 0.3000 | - |
| Ti | - | 0.2000 | - |
| V | - | 0.2000 | - |
| Nb | - | 0.0700 | - |
| S | - | 0.0200 | - |
| P | - | 0.0250 | - |
| Mn | - | 1.7000 | - |
| Si | - | 0.5000 | - |
| C | - | 0.2000 | - |
GB Q420 E GB/T 1591 Mechanical Properties
GB Q420 E GB/T 1591 steel has a high tensile strength, typically ranging from 500MPa to 900MPa. The yield strength typically ranges from 300MPa to 600MPa. This steel also has a good impact toughness, typically ranging from 15J/cm2 to 20J/cm2. These properties make it suitable for use in load-bearing structures, such as bridges and buildings. This steel also has a high wear resistance, making it suitable for use in shipbuilding and other wear applications.
The mechanical properties of GB Q420 E GB/T 1591 metals determine the range of usefulness of a material and establish the service life that can be expected. Mechanical properties are also used to help classify and identify material.
| Yield Rp0.2 (MPa) |
Tensile Rm (MPa) |
Impact KV/Ku (J) |
Elongation A (%) |
Reduction in cross section on fracture Z (%) |
As-Heat-Treated Condition | Brinell hardness (HBW) |
|---|---|---|---|---|---|---|
| 133 (≥) | 231 (≥) | 14 | 11 | 12 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 132 |
GB Q420 E GB/T 1591 Physical Properties
Physical properties of GB Q420 E GB/T 1591 mainly cover modulus of elasticity, coefficient of thermal expansion, thermal conductivity, specific thermal capacity, electrical resistance value, density, poisson's ratio, etc.
| Temperature (°C) |
Modulus of elasticity (GPa) |
Mean coefficient of thermal expansion 10-6/(°C) between 20(°C) and | Thermal conductivity (W/m·°C) |
Specific thermal capacity (J/kg·°C) |
Specific electrical resistivity (Ω mm²/m) |
Density (kg/dm³) |
Poisson's coefficient, ν |
|---|---|---|---|---|---|---|---|
| 32 | - | - | 0.12 | - | |||
| 785 | 715 | - | 32.3 | 313 | - | ||
| 198 | - | 24 | 21.2 | 111 | 321 |
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