Products Description
In the field of industrial boiler and pressure vessel manufacturing, the reliability of materials directly impacts equipment safety and production efficiency. A516 Gr70 steel plates are capable of withstanding high-temperature and high-pressure conditions, making them the optimal material for the energy and chemical industries. The core advantages of ASTM A516 Gr70 steel plates lie in precise chemical composition control and advanced rolling processes. The chemical composition of the steel plates we produce strictly complies with relevant standards:
- Carbon content ≤0.30%, ensuring a balance between weldability and toughness.
- Manganese content controlled between 0.79-1.30%, significantly enhancing the strength and hardenability of the steel.
- Phosphorus, sulfur, and other harmful elements are each controlled at ≤0.035%, effectively reducing the risk of material brittleness.
During production, workers strictly control chemical composition to ensure the steel plates maintain stable mechanical properties even in high-temperature environments. Therefore, the standardized production and clear performance specifications of ASTM A516 Gr70 boiler plates make them widely recognized internationally as steel for boilers and pressure vessels. If you need more product information, please contact us.
Video
Mechanical Properties of ASTM A516 Gr 70
| Property | Value |
| Tensile Strength | 485–620 MPa |
| Yield Strength (min) | 260 MPa |
| Elongation | ≥17–21% (depending on thickness) |
| Impact Test | Optional (often required for low-temperature service) |
ASTM A516 Grade Comparison
| Grade | Tensile Strength (MPa) | Typical Application |
| A516 Gr.60 | 415–550 | Light-duty pressure vessels |
| A516 Gr.65 | 450–585 | Medium-pressure equipment |
| A516 Gr.70 | 485–620 | Boilers & high-demand pressure vessels |
What precautions should be taken when welding A516 Gr70 steel plates during boiler manufacturing?
Pre-welding preparation
- The mechanical properties of the welding materials must match those of A516 Gr70, particularly strength and impact toughness. For example: welding rods, welding wires, and flux
- Low-hydrogen electrodes must be dried at 350-400°C for 1-2 hours and stored in an insulated container at 80-100°C to prevent moisture absorption. Moisture absorption can cause porosity in the weld and hydrogen embrittlement. Welding wire must be cleaned of oil and rust. Welding flux must be dried to remove moisture.
- Workers must select the appropriate groove type based on the thickness of the plate to ensure full penetration and prevent incomplete fusion defects.
- The groove and the 20 mm area on either side must be ground to expose the metal surface, removing rust, oil, and scale to prevent porosity or inclusions during welding.
- Workers must hold valid certifications and be familiar with the welding characteristics of low-alloy steel to avoid defects caused by improper operation.
Welding Process
- Welding can be performed using short-arc welding to reduce arc deflection and prevent porosity. When performing multi-layer, multi-pass welding, each weld bead must be cleaned of slag, inspected for defects, and then the next layer can be welded.
- When extinguishing the arc, the arc pit must be filled to prevent arc pit cracks. For long welds, methods such as segmented back welding or skip welding should be used to minimize welding deformation and stress.
- The welding environment must be protected from wind, rain, and humidity.
Post-welding Treatment
- For thick plates or structures with high rigidity, hydrogen removal treatment should be performed immediately after welding.
- Heat treatment can reduce residual welding stress, improve weld toughness, and prevent stress corrosion cracking. This is particularly important for pressure vessels such as boilers.
- After welding, remove weld slag and spatter, and perform a visual inspection of the weld. The weld should be free of defects such as cracks, porosity, inclusions, or incomplete penetration.
- Critical welds must undergo non-destructive testing to ensure internal quality compliance.
Customer Visit
Why Choose Us?
Yuxin company is a steel agent. The main business of our company is: medium and thick plates, ductile cast iron pipe, seamless pipes, deformed bars, etc. of Angang, Hangang, Wugang, Nangang, Shagang and other steel plants, as well as a variety of steel related products. We can customize various specifications, sizes, materials of the plates and building materials for users with fast delivery time, reliable quality, and favorable prices.If you want to know more about our products, please feel free to send us an email!
Hot Tags: astm a516 gr70 boiler plate, China astm a516 gr70 boiler plate suppliers, pressure vessel steel plates for nursing home
