ASTM A516 Grade 70 is a robust, pressure vessel quality (PVQ) carbon steel plate designed for moderate to lower-temperature service, known for its strength, weldability, and notch toughness, making it ideal for boilers, storage tanks, and chemical processing equipment. It offers higher strength than other A516 grades (like 55, 60, 65) with a tensile strength of 70-90 ksi (485-620 MPa).
Chemical Composition of ASTM A516 GR 70
|
Standard/Grade |
C (Max %) |
Si (%) |
Mn (%) |
P (Max %) |
S (Max %) |
Ni (Max %) |
Cr (Max %) |
Mo (Max %) |
|---|---|---|---|---|---|---|---|---|
|
ASTM A516 GR 70 |
0.27 |
0.15–0.40 |
0.85–1.20 |
0.035 |
0.035 |
0.40 (opt) |
0.30 (opt) |
0.08 (opt) |
Mechanical Properties of ASTM A516 GR 70
|
Standard/Grade |
Thickness |
Yield Strength (Min MPa) |
Tensile Strength (MPa) |
Elongation (Min %) |
Impact Toughness (Optional) |
|---|---|---|---|---|---|
|
ASTM A516 GR 70 |
6–40mm |
260 |
485–620 |
21% |
Charpy V-notch at -20°C/-46°C |
|
40–100mm |
260 |
485–620 |
17% |
Key Applications
Pressure Vessels: Its primary use, designed to withstand high pressure and moderate-to-low temperatures without cracking, crucial for chemical processing and refineries.
Boilers: Ideal for constructing industrial boilers due to its strength and ability to handle steam pressure and heat.
Storage Tanks: Used for tanks holding liquids at moderate temperatures, especially in oil and gas facilities (API 650/620 tanks).
Heat Exchangers: Suitable for components in power generation plants.
Construction: Applied in building structures and bridges where high strength and durability are needed.
Transportation: Found in manufacturing railcars, truck frames, and trailers.
Piping: Used in pressure piping systems.
Key Advantages
High Strength & Toughness: Provides good tensile strength (485–620 MPa) and excellent impact toughness, especially in moderate to low-temperature service (down to -46°C).
Superior Weldability: Low carbon content, combined with manganese, silicon, phosphorus, and sulfur, allows for easier welding, reducing weld imperfections and improving HAZ toughness.
Pressure Vessel Quality (PVQ): Specifically designed for welded pressure vessels, offering a higher standard than general structural steels like A36.
Versatile Fabrication: Easy to form, machine, and fabricate for complex designs, notes DVS.
Cost-Effective: Offers significant performance benefits without a heavy price premium compared to other high-performance steels.
Improved Grain Structure: Normalization (a required heat treatment for thicker plates) refines the grain, further boosting toughness, explains Gangsteel and DVS.
Supplementary Testing: Supports critical tests like HIC (Hydrogen-Induced Cracking) and NACE standards, crucial for sour service, according to Gangsteel.
Why Choose Us :
You can get the perfect material according to your requirement at the least possible price.
We also offer Reworks, FOB, CFR, CIF, and door to door delivery prices. We suggest you to do deal for shipping which will be quite economical.
The materials we provide are completely verifiable, right from raw material test certificate to the final dimensional statement.(Reports will show on requirement)
We guarantee to give a response within 24hours(usually in the same hour)
You can get stock alternatives, mill deliveries with minimizing manufacturing time.
We are fully dedicated to our customers. If it will not possible to meet your requirements after examining all options, we will not mislead you by making false promises which will create good customer relations.
Get an valued quotation for ASTM A516 GR 70 , Contact GNEE Steel.
What standards are equivalent to ASTM A516 GR 70?
EN 10028-2 P265GH (Europe) and GB 713 Q345R (China) are approximate equivalents, but technical specs vary; cross-verification is needed.
Can ASTM A516 GR 70 be used in corrosive environments?
It resists mild corrosion but not harsh media. For corrosive conditions, coating, cladding, or upgrading to alloy steels is recommended.
What heat treatment is ASTM A516 GR 70 subjected to?
It's usually supplied in normalized, quenched-and-tempered, or as-rolled condition. Normalization enhances uniformity and toughness.
What is the hardness requirement for ASTM A516 GR 70?
No fixed standard hardness, but typical Brinell hardness is 130-180 HB. Welded zones should be checked to avoid excessive hardness.
Can ASTM A516 GR 70 be used for high-pressure vessels?
Yes, for moderate-high pressure. Its strength and toughness meet ASME BPVC requirements, making it ideal for pressure vessels in various industries.
What is the density of ASTM A516 GR 70?
Its density is about 7.85 g/cm³ (0.284 lb/in³), same as standard carbon steels, facilitating weight calculation for equipment design.
How to inspect ASTM A516 GR 70 plates?
Inspections include chemical analysis, mechanical tests (tensile, bend), visual check, ultrasonic testing, and impact tests if required.
Is ASTM A516 GR 70 magnetic?
Yes, it's a ferritic carbon steel, hence magnetic. This property aids in non-destructive testing like magnetic particle inspection.
What is the elongation requirement of ASTM A516 GR 70?
Minimum elongation is 20% for plates ≥ 12.7 mm (0.5 in) thick, ensuring ductility to resist deformation under stress.
Can ASTM A516 GR 70 be cold-formed?
Yes, it has good cold-formability. Proper bending radius and speed are needed; post-forming heat treatment may be required for thick plates.
What certification is needed for ASTM A516 GR 70?
ASME BPVC Section II certification is common. Mill test reports (MTR) confirming chemical composition and mechanical properties are mandatory.