Products
A572GR55 Heavy Plate
Product introduction
A572GR55 heavy steel plate is a low-alloy high-strength structural steel that meets the ASTM A572 standard and is widely used in bridges, building structures, heavy machinery, high-pressure vessels and other fields. "A572" represents the production in accordance with the A572 steel standard formulated by the American Society for Testing and Materials (ASTM); "GR55" is the strength grade of the steel plate, indicating that its yield strength is not less than 379 MPa (55 ksi) and the tensile strength range is 485-620 MPa (70-90 ksi). Its main material is low-carbon steel, and appropriate amounts of manganese (≤1.35%), silicon (0.15%-0.40%) and other elements are added to improve strength and toughness. At the same time, the phosphorus (≤0.04%) and sulfur (≤0.05%) contents are strictly controlled to ensure excellent weldability.
Product parameters
ASTM A572 Grade 55 (A572Gr55) High-Strength Low-Alloy Steel plate A572 Gr 55
ASTM A572Grade 55(SA572GR55) High-Strength Low Alloy Steel plate Chemical Composition
|
Grade |
C |
Mn |
P |
S |
SI |
|
A572Gr55 |
≤0.25 |
≤1.35 |
≤0.04 |
≤0.05 |
≤0.4 |
ASTM A572Grade 55(SA572GR55) High-Strength Low-Alloy Structural Steel plate Mechanical Property
|
Grade |
Yield Strength Mpa |
Tensile Strength Mpa |
Elongation % 200mm |
Elongation % 50mm |
|
A572Gr55 |
≥380 |
≥485 |
≥17 |
≥20 |
Product features
High Strength Performance
The A572GR55 thick plate has a minimum yield strength of 380 MPa and a tensile strength range of 485 to 620 MPa. These data are derived from the specification requirements of the ASTM A572 standard to ensure its excellent load-bearing capacity. The advantage of high strength is that it can reduce the cross-sectional size of components and reduce the total weight of the structure by about 10%-20%. It is especially suitable for bridge trusses and support structures of high-rise buildings.
Good Low Temperature Impact Resistance
The impact toughness value of A572GR55 thick plate usually reaches more than 20 Joules in an environment of minus 20°C, showing its good low-temperature impact resistance. The impact toughness value refers to the material's ability to absorb energy when subjected to impact loads. The higher the value, the stronger the material's ability to resist brittle fracture. Excellent toughness enables it to withstand certain dynamic loads and impact loads, such as frequent vehicle impacts in bridge structures and wave impacts on ocean platforms.
Good Weldability
The carbon equivalent (Ceq) of A572GR55 thick plate is usually less than 0.45%, which is significantly lower than ordinary structural steel (such as Q235, the carbon equivalent is about 0.55%), which makes the possibility of cracks during welding less than 0.5%. Therefore, it is particularly suitable for complex welding scenarios such as piping systems and building frame structures, effectively reducing rework costs and shortening the construction cycle.
Strong Corrosion Resistance
After being tested for 500 hours in a salt spray environment with a humidity of 85% and a temperature of 35°C, the surface corrosion area of the A572GR55 steel plate was less than 5%. This feature makes it suitable for use in marine terminals, humid industrial environments and open-air facilities, effectively reducing maintenance frequency and costs.
Product applications
Bridge Engineering
A572GR55 thick plates are widely used in the load-bearing components of bridge main beams, truss structures and piers. They can effectively resist dynamic loads and impact forces and ensure the structural stability of bridges.
High-rise Building Structures
In high-rise buildings, A572GR55 thick plates can be used as the main load-bearing frames, support columns and beams. With its high strength, it reduces the weight of building components and improves seismic performance.
Heavy Machinery Manufacturing
This steel plate is often used to manufacture key components of large mechanical equipment, such as excavator chassis, crane booms and mining equipment.
Ships And Offshore Platforms
A572GR55 thick plates are widely used in offshore engineering to manufacture offshore drilling platforms, hull structures and port machinery.
Open-air Storage And Port Facilities
A572GR55 thick plates are suitable for manufacturing storage equipment, port cranes and logistics systems in open-air environments.
FAQs
Q: What are the specifications and dimensions of A572GR55?
A: The thickness of A572GR55 steel plates is usually between 6-100 mm, the width range is 1500-3000 mm, and the length range is 6000-12000 mm. At the same time, special sizes can be customized according to customer needs, and the processing error can be controlled within ±0.3 mm.
Q: What engineering fields are A572GR55 suitable for?
A: A572GR55 is widely used in many fields, including bridge construction, high-rise building frame structures or earthquake-resistant structures, heavy machinery such as crane arms and mining machinery, etc.
Q: Does A572GR55 need heat treatment?
A: In general, A572GR55 does not require additional heat treatment, but normalizing or tempering can be performed in special application scenarios. For example, the normalizing temperature range is 880-920°C, which helps to improve the internal structure and toughness, while the tempering temperature range is 540-680°C, which can effectively eliminate internal stress and enhance its ability to adapt to high and low temperature environments.
Q: What is the difference between A572GR55 and A572GR50?
A: The main difference between A572GR55 and A572GR50 is the difference in yield strength. The yield strength of A572GR55 is 379 MPa, which is higher than the 345 MPa of A572GR50. Therefore, A572GR55 is more suitable for engineering projects that require higher strength, such as bridges and heavy machinery, while A572GR50 is suitable for medium-strength building structure applications.
Q: What is the corrosion resistance of A572GR55?
A: A572GR55 exhibits good corrosion resistance in normal atmospheric environment, with an average annual corrosion rate of about 0.5 mm/year, but when used in marine or acidic environments, it is recommended to add anti-corrosion coating or galvanizing to further extend its service life.
Q: How to ensure the quality of A572GR55?
A: A572GR55 steel plates undergo strict quality inspections before leaving the factory, including chemical composition inspection using a spectrometer to ensure that the element content meets ASTM standards, tensile and impact tests (impact energy is not less than 27J at -20°C) to verify its mechanical properties, and ultrasonic flaw detection to reach EN10160 U2 level to ensure that the steel plate has no internal cracks or pore defects.
Hot Tags: a572gr55, China a572gr55 manufacturers, suppliers, factory, steel plate for frames, import steel plate, precision steel plate, dimension steel plate, carbon steel plate, tensile strength steel plate
