Products Description
A516 Gr70 steel plate is a carbon steel plate widely used in the manufacture of medium- and low-temperature pressure vessels for boilers, offering excellent overall performance.
- Impact Toughness: A516 Gr70 steel plate maintains good toughness in medium-to-low temperature environments, preventing brittle fracture in boilers due to impact loads or temperature fluctuations during operation.
- Weldability: Suitable for various common welding methods, the welding process is less prone to defects such as cracks and porosity, resulting in high-quality welded joints.
- Fatigue Resistance: Boilers undergo cyclic pressure and temperature changes during operation. A516 Gr70 steel plate exhibits excellent fatigue resistance, capable of withstanding long-term alternating loads.
- Formability: The product is easily processed and formed. It can be fabricated into various boiler components through rolling, forging, bending, and other processes.
Trusted A516 GR70 supplier with global delivery.
Mill-Test-Certificate-and-Certificate-of-Origin.PDF
Product Specifications
| Specifications | Numerical Values |
| Carbon (C) | ≤ 0.27 |
| Manganese (Mn) | 0.85 – 1.20 |
| Phosphorus (P) | ≤ 0.035 |
| Sulfur (S) | ≤ 0.035 |
| Silicon (Si) | 0.15 – 0.40 |
| Tensile Strength | 485 – 620 MPa |
| Yield Strength (min) | 260 MPa |
| Elongation (in 200 mm) | ≥ 17% |
| Impact Tested | typically at -50°C for Grade 70 |
Equivalent Material Grades Comparison
| Standard | Grade | Yield Strength (min.) | Tensile Strength | Typical Applications | Key Characteristics |
|---|---|---|---|---|---|
| ASTM (USA) | A516 Gr70 | 290 MPa | 485–620 MPa | Medium/low pressure boiler drums, pressure vessels | Excellent weldability, low carbon content, meets ASME BPVC |
| ASTM (USA) | A515 Gr70 | 260 MPa | 485–620 MPa | High-temperature service (boilers, headers) | Better elevated-temperature strength, less resistant to low-temperature impact |
| GB (China) | Q245R | 245 MPa | 400–520 MPa | Low/medium pressure boilers, heat exchangers | Good toughness and cold formability, widely used in China |
| GB (China) | Q345R | 345 MPa | 510–640 MPa | Medium pressure vessels, higher strength requirements | Higher yield strength than A516 Gr70, good weldability |
| EN (Europe) | P265GH | 265 MPa | 410–530 MPa | Pressure vessels, steam boilers | Creep-resistant at elevated temperatures, certified for PED |
| EN (Europe) | P355GH | 355 MPa | 490–630 MPa | Higher-strength pressure equipment | Similar to Q345R, suitable for thicker walls |
| JIS (Japan) | SB450 | 265 MPa | 450–590 MPa | Boilers and pressure vessels | Equivalent to A515 Gr65/A516 Gr65 range |
| DIN (Germany) | HII / P265GH | 265 MPa | 410–530 MPa | Pressure vessel plates for elevated temperature | Former HII grade, now replaced by P265GH |
Reasons for Selecting A516 Gr70 Steel Plate in Boiler Manufacturing
1. Mechanical Properties Meet Boiler Pressure Requirements
During boiler operation, internal media generate high pressures, imposing specific demands on steel strength and toughness.
Strength Compliance: With a yield strength ≥230MPa and tensile strength of 485-620MPa, it withstands normal operational pressures, preventing structural deformation or rupture.
Superior Toughness: Particularly its low-temperature impact energy (e.g., impact value at -29°C) meets standards, accommodating temperature fluctuations during boiler startup and shutdown to prevent cold brittleness.
2. Weldability Suitable for Boiler Fabrication
Boilers are fabricated from multiple welded components, where weld quality directly determines safety.
Optimized carbon and alloy element control minimizes defects like cracks and porosity during welding.
Conventional welding processes achieve high-quality joints without complex pre-treatment, reducing manufacturing complexity and costs.
3. Corrosion and Fatigue Resistance Suitable for Service Environments
Internal boiler media are predominantly water or steam, which can cause corrosion and fatigue during prolonged operation.
The production process of A516 Gr70 steel plate strictly controls harmful elements like phosphorus and sulfur, reducing corrosion risks in wet steam environments.
The material's good plasticity and toughness enable it to withstand cyclic pressure fluctuations during long-term boiler operation, lowering the probability of fatigue damage.
Discuss Cooperation
FAQ
01.Why choose A516 Gr70 instead of more expensive Cr-Mo steel?
02.What certifications and testing do you provide?
03.Can you supply large quantities for export?
04.How do I request a quote or sample?
Company Profile
Our main products are stainless steel plate/sheet, coil, round/square tube, bar, nickel alloy and so on. Factory test certification is provided at the time of shipment,and third-party inspection is possible. We are also certifiedby IsO, SGS and Alibaba. We have many professionals, technicians, more competitive prices than other stainless steel companies and the best after-sales service. And exports to more than 50 countries, mainly from the United States, Russia, the United Kingdom, Kuwait, Egypt, Turkey, Jordan, India and so on. If you want to know more about our products, please feel free to send us an email!
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