ASTM A572GR.50 is a high-strength low-alloy niobium-vanadium structural steel plate that follows the naming rules of American standard steel plates. Among them, "A" represents the American standard high-strength plate, "572" represents the yield strength of the steel plate is 572MPa, and "Gr50" represents the grade of the steel plate. This steel plate is a type of low-alloy high-strength steel plate and complies with ASTM A572/A572M standards. A572GR is divided into five grades: 42 (290), 50 (345), 55 (380), 60 (415) and 65 (450). Among them, A572Gr50 steel plate is suitable for riveting, bolting or welding structural parts. .
ASTM A572GR.50 is a high-strength low-alloy structural steel whose chemical composition has an important influence on its mechanical properties and processing properties. The following are typical chemical compositions of ASTM A572GR.50 (expressed as mass percent):
| C |
Si |
Mn |
P |
S |
Nb |
V |
Cu |
| ≤0.23% |
≤0.40% |
≤1.35% |
≤0.035% |
≤0.035% |
≤0.015% |
≤0.05% |
≤0.35% |
The production method of ASTM A572GR.50 mainly includes the following steps: primary refining, LF refining, VD treatment, continuous casting (mold casting),
Cleaning, heating, rolling, stacking, surface inspection, batching, flaw detection, heat treatment, cutting and sampling, performance inspection, and warehousing.
ASTM A572GR.50 is a high-strength low-alloy structural steel with the following characteristics:
1. High strength: The yield strength of ASTM A572GR.50 is 50 ksi (approximately 345 MPa), which enables it to withstand large loads and stresses and is suitable for structural parts requiring high-strength materials.
2. Good weldability: ASTM A572GR.50 has excellent welding performance, is easy to perform welding processing, and can maintain good strength and toughness after welding.
3. Good toughness: ASTM A572GR.50 not only performs well in strength, but also in toughness, being able to maintain structural integrity when subjected to impact or vipation.
4. Good formability: ASTM A572GR.50 has good formability and can be formed by cold working or hot working to meet different design requirements.
5. Good corrosion resistance: Although ASTM A572GR.50 is not a steel type specifically designed for corrosion resistance, its alloy composition and structure make it have certain corrosion resistance compared to ordinary carbon steel.
6. Economy: Although ASTM A572GR.50 is a high-strength steel, its production cost is relatively low, so it also has good economy while ensuring structural performance.
7. Comply with standards: The production and testing of ASTM A572GR.50 follows the relevant standards of ASTM (American Society for Testing and Materials), ensuring the stability and reliability of its quality and performance.
ASTM A572GR.50 has a wide range of applications, mainly including the following fields: Construction field: A572GR.50 is used to construct high-rise buildings, large factories, pidges and other structures. Vehicle manufacturing: A572GR.50 steel is used to manufacture key components of cars, trucks and trains, such as frames, axles, suspension systems, etc. Heavy machinery and equipment manufacturing: A572GR.50 steel plate is used to manufacture various heavy machinery and equipment, such as excavators, loaders, cranes, mining machinery and construction machinery pressure vessels, etc. A572GR.50 steel is used to manufacture pressure vessels.
