Product Item: ASTM A516 Grade 70 Steel Plate
Type: Steel Plate
Material: ASTM A516 Grade 70, Carbon Steel
Size: 20 mm * 2 Meters * 6 Meters, 20*2000*6000 mm
Surface: No
Export Country:Venezuela
Our ASTM A516 Grade 70 steel plate is manufactured in China, offering high strength and durability. This carbon steel plate measures 20 mm in thickness, 2 meters in width, and 6 meters in length.
It is designed without surface treatment, allowing for customization based on specific application needs.
The ASTM A516 Grade 70 material ensures excellent mechanical properties, making it ideal for applications requiring high load-bearing capacity and resistance to environmental conditions.
ASTM A516 GR. 70 Fine-Grain Killed Steel Plate
1. What is ASTM A516 GR70 NACE HIC Steel Plate
The ASTM A516 GR70 specification is a standard for carbon steel plates used in pressure vessels for moderate and low-temperature services. When combined with NACE (National Association of Corrosion Engineers) and HIC (Hydrogen Induced Cracking) compliance, this boiler quality steel plate is engineered to perform in harsh environments where resistance to hydrogen-induced damage is critical. These plates are widely used in industries such as oil and gas, petrochemical, and power generation.
2. Key Features of ASTM A516 GR70 NACE HIC
High Strength and Toughness: The A516 Gr70 plate offers excellent tensile strength and toughness, making it ideal for pressure vessel applications.
HIC Resistance: Specifically tested for Hydrogen Induced Cracking, ensuring reliability in sour gas environments.
NACE Compliance: Meets NACE MR0175/ISO 15156 standards for use in environments with high sulfur content.
Weldability: The low carbon content enhances weldability, allowing for easy fabrication and assembly.
Versatile Thickness Range: Available in various thicknesses to suit diverse project requirements.
3. Chemical Composition and Mechanical Properties
The chemical composition of ASTM A516 Grade 70 (HIC) steel plates is specified to ensure resistance to hydrogen-induced cracking (HIC) in sour service environments. The values below are maximum limits unless otherwise stated, as per ASTM A516/A516M and NACE TM0284 for HIC testing.
|
Element |
Composition (% by weight) |
Notes |
|---|---|---|
|
Carbon (C) |
0.27 - 0.31 |
Maximum, varies with plate thickness (≤0.27% for plates ≤12.5 mm). |
|
Manganese (Mn) |
0.79 - 1.30 |
For each 0.01% reduction in C below max, Mn may increase by 0.06% up to 1.50%. |
|
Phosphorus (P) |
0.025 |
Reduced for HIC resistance, stricter than standard A516 (0.035 max). |
|
Sulfur (S) |
0.025 |
Reduced for HIC resistance, stricter than standard A516 (0.035 max). |
|
Silicon (Si) |
0.15 - 0.40 |
Enhances oxidation and corrosion resistance. |
|
Aluminum (Al) |
0.02 (min) |
For deoxidation and fine grain structure (killed steel). |
|
Chromium (Cr) |
0.30 (max) |
Trace element, optional for enhanced corrosion resistance. |
|
Copper (Cu) |
0.30 (max) |
Trace element, optional for corrosion resistance. |
|
Nickel (Ni) |
0.30 (max) |
Trace element, optional for toughness. |
|
Molybdenum (Mo) |
0.08 (max) |
Trace element, optional for strength. |
|
Niobium (Nb) |
0.01 (max) |
Trace element for grain refinement. |
|
Titanium (Ti) |
0.03 (max) |
Trace element for grain refinement. |
|
Vanadium (V) |
0.02 (max) |
Trace element for strength. |
|
Carbon Equivalent (CEV) |
0.43 (max, ≤1.25" thick) |
CEV = C + Mn/6 + (Cr+Mo+V)/5 + (Ni+Cu)/15; stricter for HIC resistance. |
Notes:
The steel is fully killed and fine-grain treated to enhance HIC resistance.
HIC testing per NACE TM0284 ensures low sulfur and phosphorus content to minimize susceptibility to hydrogen-induced cracking in wet H2S environments.
Supplementary requirements (e.g., S1: Vacuum Treatment, S2: Product Analysis) may apply as per ASTM A20/A20M for enhanced quality control.
Mechanical Properties:
|
Property |
Value |
Notes |
|---|---|---|
|
Tensile Strength |
485 - 620 MPa (70,000 - 90,000 psi) |
Measured via tension test, ensuring high strength for pressure vessels. |
|
Yield Strength (min) |
260 MPa (38,000 psi) |
Minimum stress at which plastic deformation begins. |
|
Elongation (min, 200 mm gauge) |
17% |
Indicates ductility for 200 mm gauge length. |
|
Elongation (min, 50 mm gauge) |
21% |
Indicates ductility for 50 mm gauge length. |
|
Charpy V-Notch Impact Toughness |
Varies (typically 27 J at -46°C) |
Tested per ASTM A20 S5 for notch toughness in low-temperature service. |
|
Hardness (typical) |
200 HB (max) |
Approximate Brinell hardness for normalized plates. |
Additional Properties
|
Property |
Value |
Notes |
|---|---|---|
|
Thermal Conductivity |
~52.0 W/m-K |
High thermal conductivity aids heat dissipation in boilers/pressure vessels. |
|
Density |
~7.85 g/cm³ |
Typical for carbon steel. |
|
Weldability |
Excellent |
Low carbon and controlled alloying ensure good weldability. |
|
HIC Resistance |
NACE TM0284 compliant |
Tested for resistance to hydrogen-induced cracking in wet H2S environments. |
Charpy V-notch impact testing is often required for HIC plates to ensure performance in low-temperature, sour service environments.
Supplementary testing (e.g., S3: Simulated Post-Weld Heat Treatment, S8/S12: Ultrasonic Examination) may be applied to verify mechanical integrity.
These properties make the boiler quality steel plate suitable for demanding applications where strength and durability are paramount.
4. Applications of ASTM A516 GR70 NACE HIC Steel Plate
The A516 Gr70 plate is widely used in industries requiring robust materials for extreme conditions:
Oil and Gas: For pipelines, storage tanks, and pressure vessels exposed to sour gas.
Petrochemical: In reactors and heat exchangers where corrosion resistance is essential.
Power Generation: For boilers and steam drums operating under high pressure.
Chemical Processing: In equipment handling aggressive chemicals.
5. Why Choose GNEE steel for ASTM A516 GR70 NACE HIC Steel Plates?
At GNEE STEEL, we pride ourselves on delivering high-quality ASTM A516 pressure vessel steel tailored to your needs. Our advantages include:
Quality Assurance: All plates undergo rigorous testing, including HIC and NACE compliance checks.
Global Export: We supply A516 Gr70 plate to clients worldwide, ensuring timely delivery.
Customization: Offering plates in various sizes and thicknesses to meet specific project requirements.
Competitive Pricing: High-quality products at cost-effective rates.
6.What is the difference between A516 GR 60 and A516 GR 70?
Chemical Composition Grade 70 has a higher carbon and manganese content compared to Grade 60 and Mechanical Properties Grade 70 has higher tensile and yield strength than Grade 60 and Applications While both are used in similar applications, Grade 70 is chosen when higher strength is needed and Both grades offer excellent weldability and are commonly used in the oil, gas, and petrochemical industries for making boilers and pressure vessels.
7.What is the difference between A36 and A516 gr 70?
ASTM A516 Gr 70 VS A36, ASTM A516 steel and A36 steel actually belong to different steel types. ASTM A516 steel is pressure vessel and boiler steel. ASTM A36 steel is mild steel. For the chemical content of carbon, ASTM A516 steel and A36 steel are also called carbon steel.
8.What is the difference between A516 GR 70 and A105?
ASTM A516 Gr. 70 is usually used to manufacture pressure vessels, and its materials must meet higher requirements, including tensile strength, yield strength, impact toughness, etc. In contrast, ASTM A105 is used to manufacture flanges, which generally have lower material requirements.
9.What is the difference between A516 GR 70 and A285 GR C?
The Sa-516-70 has a higher tensile and yield strength than the Sa 285 grade, which is the main difference between them. In various conditions, the tough ASTM A285 Grade C Carbon Steel Plates does not decay or disintegrate at temperatures as low as -20 degrees or lower.
10.What is ASTM A516 GR 70 equivalent to?
P355GH
Description. 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.
11.What is the difference between A516 70 and A516 70N?
A516 Gr 70 steel plate is hot rolled plate. And A516 Gr 70N steel plate, N indicates that it is a normalizing plate, that is, an additional normalizing heat treatment.
