ASTM A612 High Strength Carbon Steel Pressure Vessel Plates
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ASTM A612 High Strength Carbon Steel Pressure Vessel Plates
ASTM A612/A612M is the standard specification for high-strength pressure vessel plates intended for welded pressure vessels operating in moderate and lower temperature conditions.The steel is a killed carbon–manganese–silicon (C–Mn–Si) alloy that is fully deoxidized to ensure uniform internal quality and improved toughness performance.
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GNEE Steel is a professional pressure vessel steel plate manufacturer and exporter with extensive experience in supplying ASTM A612 steel plate for pressure vessel building to global customers.
ASTM A612 PVQ Pressure Vessel Plate
ASTM A612 Dimension Range
Description: ASTM A612/A612M Boiler Pressure Vessel Steel Plate
Thickness: 6mm ~ 25mm
Width：900mm ~ 3650mm
Length：3000mm ~ 18000mm
Manufacturing Types：As-Rolled, Normalized, Normalized & Stress Relieved.
ASTM A612 Chemical Composition
ASTM A612 carbon-manganese-silicon steel plates chemical composition:
| Carbon max. | 0.25% |
| Manganese | 1.00-1.50% |
| Phosphorus max. | 0.03% |
| Sulfur max. | 0.03% |
| Silicon | 0.15-0.50% |
| Copper max. | 0.35% |
| Nickel max. | 0.25% |
| Chromium max. | 0.25% |
| Molybdenum max. | 0.08% |
| Vanadium max. | 0.08% |
ASTM A612 Mechanical properties
| MATERIAL | Tensile Strength(MPa) | Yield Strength(MPa) MIN | % Elongation MIN |
| ASTM A612 | 560-725 | 345 | 16 |
ASTM A612 Supply status and heat treatment
ASTM A612 steel plates are normally supplied in the as-rolled condition. However, normalizing, stress relieving, or a combination of both heat treatments can be performed upon customer request.
- Normalizing
- Annealing
- Tempering
- TMCP (Thermo-Mechanical Controlled Processing)
- PWHT (Post-Weld Heat Treatment)
- Quenched & Tempered (Q&T)
- Charpy V-Notch Impact Test (low-temperature impact testing available on request)
Plates produced from coils with no heat treatment or only stress relief treatment shall comply with supplementary requirements and test provisions specified in ASTM A20/A20M.
Typical applications of ASTM A612：
Thanks to its high strength, outstanding low-temperature toughness and favorable weldability, ASTM A612 steel plates are widely applied in the following fields:
Oil and Gas Industry
- Onshore and Offshore Oil Storage Tanks.
- Low-temperature Separation Units for Offshore Platforms.
- Natural Gas Production, Storage and Transportation Equipment.
- H₂S Corrosion Resistant Equipment for Sour Oil & Gas Fields.
Chemical and Process Industry
- Reactors, Heat Exchangers.
- High-pressure vessels such as urea synthesis converters and ammonia reactors.
Power and Energy Industry
- Boiler Drums, Steam Generators
- Nuclear Pressure Vessel Shells
- New energy storage and transportation equipment including liquid hydrogen storage tanks and liquid carbon dioxide tank trucks.
Spherical Tanks and Large Storage and Transportation Equipment
- Spherical Tanks
- High-pressure Storage Tanks and Separators
ASTM A612 Equivalent International Standards
ASTM A612 steel plate has multiple equivalent or similar grades internationally.
| Standard / Region | Equivalent Grades |
|---|---|
| China (GB) | Q345R |
| Europe (EN) | P275N, P275NH |
| Germany (DIN) | WStE 285, 1.0487 |
| United Kingdom (BS) | BS1501 |
| Japan (JIS) | STB 345, STB 360 |
ASTM A612/A612M High-Strength PVQ Steel Plate Real-World Case Studies：
Case 1: LNG Storage Tanks in Australia
Client: Leading LNG Export Terminal
Challenge:
Build 160,000m³ LNG tanks (-165°C) with inner shell support structures requiring -45°C impact toughness.
Budget constraints demanded cost-effective alternatives to 9% Ni steel.
Solution:
Inner supports: ASTM A612 PVQ plates (thickness: 50mm) with Charpy V-notch testing @ -45°C.
Welding: Submerged arc welding (SAW) with AWS A5.23 EM12K wire.
Result:
Saved $1.2M vs using 9% Ni steel for non-cryogenic zones.
Passed 100% UT and MT inspections (ASME BPV Code Case 2596).
Case 2: Hydrogen Reactor in Germany
Client: Green Hydrogen Startup
Challenge:
Fabricate a 12MPa hydrogen reactor operating at 300°C with cyclic loading.
Required material with H₂ embrittlement resistance under PED 2014/68/EU.
Solution:
Shell material: A612 PVQ (80mm thickness) + NACE TM0284 HIC testing.
Post-weld heat treatment (PWHT): 620°C ×4h to relieve residual stresses.
Result:
Achieved 30-year design life certification by TÜV SÜD.
Reduced total weight by 15% vs A516 Gr.70.
Why choose us?
1.We can provide free samples for you to inspect and check.
2.We can provide personalized customization services, such as adding your company logo, specified colors and other needs to the product.
3.If you come to China, we would like to take you on a factory tour.
4.If you have any questions, please do not hesitate to contact me.
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ASTM A612 Product Processing and Product Testing
The processing methods of ASTM A612 Pressure Vessel steel plate include cutting, forming,heat treatment, polishing, spray painting, etc.
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FAQ:
1. What is the difference between ASTM A612 and ASME SA612?
There is no fundamental difference. SA612 is the designation in the ASME specification, and its technical content is completely identical to ASTM A612, applicable to the manufacture of pressure vessels for ASME certification.
2. What is the maximum thickness of A612 steel plate?
The standard specifies a maximum thickness of 1 inch (25mm). Some suppliers can produce thicker specifications (e.g., 50-80mm), but this must be negotiated and confirmed by both the supplier and the buyer to meet performance requirements.
3. Can A612 be used in low-temperature environments?
Yes. ASTM A612 is designed for medium and low-temperature services. The standard meets impact requirements up to -30°C, and practical engineering has verified it to reach -45°C.
4.Is ASTM A612 steel plate good for welding in pressure vessel fabrication?
Yes, ASTM A612 steel plate has low carbon content and controlled composition, providing excellent weldability, although preheating may be required for thicker plates.
5.Are SA612 and A612 Steel Plates the Same Product? What Are the Core Differences?
They are the same type of steel plate. ASTM A612 is the material standard, while ASME SA612 is the designation assigned after ASTM A612 was incorporated into the ASME Boiler & Pressure Vessel Code, specifically for the fabrication of pressure-bearing equipment.
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