A515 Grade 70 is a high-strength, carbon-silicon steel plate (ASTM A515 Gr 70) designed for welded boilers and pressure vessels in moderate to high-temperature service, offering excellent strength (70-90 ksi tensile) and good weldability, though it's not for low-temp impact or sour service, commonly used in power generation and petrochemical industries.
Chemical Composition
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Chemical Requirements |
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|---|---|---|---|---|
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Elements |
Composition, % |
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Grade 60 [Grade 415] |
Grade 65 [Grade 450] |
Grade 70 [Grade 485] |
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Carbon, max: A,B |
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1 in. [25 mm] and under |
0.24 |
0.28 |
0.31 |
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Over 1 to 2 in. [25 to 50 mm], incl |
0.27 |
0.31 |
0.33 |
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Over 2 to 4 in. [50 to 100 mm], incl |
0.29 |
0.33 |
0.35 |
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Over 4 to 8 in, [100 to 200], incl |
0.31 |
0.33 |
0.35 |
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Over 8 in. [200 mm] |
0.31 |
0.33 |
0.35 |
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Manganese, B max |
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Heat analysis |
0.90 |
0.90 |
1.2 |
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Product analysis |
0.98 |
0.98 |
1.3 |
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Phosphorus, max A |
0.025 |
0.025 |
0.025 |
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Sulfur, max A |
0.025 |
0.025 |
0.02 |
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Silicon: |
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Heat analysis |
0.15-0.40 |
0.15-0.40 |
0.15-0.40 |
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Product analysis |
0.13-0.45 |
0.13-0.45 |
0.13-0.45 |
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Mechanical Properties
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Tensile Requirements |
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|---|---|---|---|---|
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Grade |
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60 [415] |
65 [450] |
70 [485] |
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Tensile strength, ksi [MPa] |
60-80 [415-550] |
65-85 [450-585] |
70-90 [485-620] |
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Yield strength, min, ksi [MPa] |
32 [220] |
35 [240] |
38 [260] |
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Elongation in 8 in. [200 mm], min, % A |
21 |
19 |
17 |
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Elongation in 2 in. [50 mm], min, % A |
25 |
23 |
21 |
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Applications:
ASTM A515 steel plates are commonly used in:
Manufacturing of pressure vessels for the oil and gas industry.
Construction of boilers and heat exchangers.
Fabrication of industrial storage tanks and other pressure-sensitive equipment.
Applications where high strength and durability are required, especially in high-temperature environments.
If you have project requirements for A515 Grade 70, we welcome your inquiry. GNEE maintains a large inventory of commonly used high strength steel grades for your selection.For detailed mechanical properties, chemical composition, and technical data, as well as free samples, please contact our factory immediately. We offer competitive prices, stable quality, and professional service. Email:beam@gneesteelgroup.com.
What is grade 70 steel equivalent to?
ASTM A516 Grade 70 is a boiler / pressure vessel quality of steel plate for use in low to moderate services. It has improved notch toughness. A516 GD70 steel plate is equivalent to the P355GH and 490B grades.
What is A515 70 material?
A515 covers carbon steel plate for use in pressure vessels at ambient and higher temperature service. The alloy involved for the specification is basically similar to AISI 1330 steel. Used for high strength plate that is fabricated into pressure vessels for intermediate and higher temperature service such as boilers.