ASTM A515 Grade 70 STEEL PLATE
Gnee steel is a leading supplier of high-quality pressure vessel steel plates, specializing in ASTM A515GR70 steel plates. Designed for intermediate and higher-temperature service, ASTM A515 GR.70 is a carbon steel plate widely used in pressure vessel manufacturing due to its excellent strength, durability, and weldability.
Gnee steel provides an in-depth look at the chemical composition, mechanical properties, and applications of ASTM A515GR.70, along with comparisons to related grades such as ASTM A515 Grade 60, ASTM A515 Grade 65, and ASTM A516 Grade 70 to help you make informed decisions for your projects.
A515 70 is a carbon steel plate specified under the ASTM A515 standard for pressure vessel plates, designed for intermediate and higher-temperature service. These plates are normalized to enhance their mechanical properties, making them ideal for applications such as boilers, heat exchangers, and other pressure vessels operating under elevated temperatures.
ASTM A515 Gr 70 plate is a carbon-silicon steel plate that is primarily used for high-temperature service in boilers and pressure vessels. This grade of steel has excellent weldability and is suitable for moderate and lower temperature services.
One of the primary advantages of ASTM A515 Gr 70 is its high tensile strength, which allows it to withstand high pressures and stress. The material also has good corrosion resistance and is resistant to oxidation and sulfidation at elevated temperatures.
Another advantage of ASTM A515 Gr 70 plate is its relatively low cost compared to other high-temperature materials, making it an ideal choice for cost-sensitive applications.
Key Characteristics & Uses:
Application: Primary use in boilers, pressure vessels, heat exchangers, and similar high-pressure equipment.
Temperature: Designed for moderate to high-temperature service, unlike A516 grades for lower temperatures.
Strength: High tensile strength (70-90 ksi or 485-620 MPa) allows it to handle significant internal pressures.
Weldability: Excellent weldability using standard methods, making it popular for fabrication.
Formability: Readily cold-formed and hot-worked.
Limitations: Not suited for sour (H2S) environments due to risk of Hydrogen Induced Cracking (HIC) or for applications requiring low-temperature impact toughness.
ASTM A515 Grade 70 Chemical Composition:
| Steel Grade | The Element Max (%) | ||||
|---|---|---|---|---|---|
| C | Mn | P | S | Si | |
| A515 grade 70 | 0.30-0.35 | 1.30 | 0.035 | 0.035 | 0.13-0.45 |
ASTM A515 Grade 70 Mechanical Property:
| Steel Grade | ASTM A515 Mechanical Property | |||
|---|---|---|---|---|
| Thickness mm | Yield Min Mpa | Tensile Mpa | Elongation Min % | |
| A515 grade 70 | 200 | 260 | 485-620 | 17 |
| 50 | 21 | |||
ASTM A515 Grade 70 Equivalent Steel Grade:
| Steel Grade | China | Japanese | Germany | France | Italy | Sweden | UK |
|---|---|---|---|---|---|---|---|
| ASTM A515 Grade 70 | JIS G3103 SB480 | DIN 1715 1.0844, | A48 CP,AP,FP | Fe 460-2-KW | SS21,02,01 | Gr 360,400 |
1What is the difference between ASTM A515 Grade 70 and ASTM A516 Grade 70?
ASTM A515GR70 is designed for intermediate and higher-temperature service, while ASTM A516 Grade 70 is optimized for moderate and lower-temperature applications. A515 Grade 70 has a normalized structure for enhanced heat resistance, whereas A516 Grade 70 offers better toughness in colder environments.
2What are the typical applications for ASTM A515 Grade 70?
A515 70 is commonly used in boilers, pressure vessels, heat exchangers, and petrochemical equipment due to its high strength and ability to withstand elevated temperatures.
3Is ASTM A515 Grade 70 suitable for welding?
Yes, ASTM A515 GR.70 has excellent weldability, thanks to its controlled carbon equivalent (Ceq). Proper welding procedures should be followed to maintain its properties.
4What temperature is ASTM A515 Grade 70
ASTM A515 Grade 70 is a carbon steel plate for boilers and pressure vessels, suited for intermediate to high-temperature service, with properties like a melting point around 2740°F (1500°C) and strength retention at elevated temperatures (e.g., retaining strength at 932°F/500°C). Its specific service temperature range depends on application but it excels in higher heat environments compared to lower grades, offering good weldability and strength.
5What are the typical application fields of ASTM A515 Grade 70 ?
ASTM A515 Grade 70 steel is primarily used for pressure vessels, boilers, and heat exchangers in high-temperature applications, especially in the oil, gas, and petrochemical industries, due to its excellent strength, weldability, and durability at elevated temperatures. Its main applications involve fabricating components that handle pressurized liquids or gases, offering a cost-effective and robust material for demanding conditions, though not ideal for very low-temperature or sour service.
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