ASME SA612 Steel Plate is High Strength Solution for 16% More Efficient TransportationCost-effective material for LPG tanks, spherical storage vessels, and mobile pressure containers.
Boiler and pressure vessel plates, commonly referred to as "vessel plates," are special-purpose steel plates specifically designed for the manufacture of boilers, pressure vessels, and other equipment subjected to internal or external pressure. They must operate safely and reliably over long periods under severe conditions such as high temperatures, high pressures, and corrosive media; therefore, the quality requirements for the steel are extremely stringent.
ASME SA612 is a high-strength, killed, fine-grained carbon-manganese-silicon steel plate specifically designed for fusion-welded pressure vessels. It complies with the ASME Boiler and Pressure Vessel Code (BPVC) and is optimized for medium- and low-temperature service conditions, where structural integrity and weight efficiency are critical.
ASME SA612 Boiler Pressure Vessel Steel Plate Specifications
| Item | Full Specification for Boiler & Pressure Vessel Service |
|---|---|
| Product Name | ASME SA612 / ASTM A612 High-Strength Fine Grain Killed Carbon-Manganese-Silicon Steel Plate |
| Applicable Standard | ASME SA612 / ASTM A612M |
| Steel Classification | Fully killed fine grain carbon-manganese silicon pressure vessel steel, low cold cracking susceptibility for welding |
| Manufacturing Process | Controlled hot rolling, uniform grain refinement rolling for thick gauge plates |
| Thickness Range |
Standard scope per original standard: 6 mm – 25 mm (0.25 in – 1 in) Extended production via mill technical agreement: 26 mm – 50 mm (custom normalized thick plate for heavy wall boilers & large storage tanks) |
| Width Range | 1,000 mm – 4,020 mm ultra-wide plate |
| Length Range | 2,000 mm – 12,000 mm fixed length, custom cutting available |
| Surface Condition |
As-Rolled (AR, mill oxide surface); Optional shot blasting to Sa2.5 grade + anti-rust primer painting for vessel fabrication |
| Edge Type | Mill Edge (ME), CNC Trimmed Machined Edge (TE), beveled edge for welding on request |
| Heat Treatment Rules |
1. Plates ≤12.5 mm (0.5 in): normally supplied as hot rolled 2. Plates over 12.5 mm: normalized heat treatment (heating ≤925°C, air cooling) as standard delivery for stable low-temperature toughness 3. Stress relief annealing optional for heavy welded boiler shells & cryogenic tank components |
| Standard Delivery Condition | Hot Rolled (AR) / Normalized (N) (Normalized state recommended for all pressure vessel & boiler projects) |
| Mandatory & Optional Inspection |
1. Mechanical test: tensile, bend, -40℃ Charpy V-notch low-temperature impact test 2. NDT: 100% ultrasonic testing UT per ASTM A578 Class B / S5 on demand 3. PMI positive material identification, magnetic particle testing MT available4. Third-party witness inspection authorized (BV, SGS, TÜV, LR) |
| Official Mill Certificates | EN 10204 3.1 factory test report, EN 10204 3.2 third-party certified MTC mill test certificate, full thermal treatment & NDT record documents |
| Origin Mill |
Produced in collaboration with major steel mills PVQ certified ASME plate manufacturer |
| Minimum Order Quantity | 1 full plate, small cutting order acceptable |
| Monthly Supply Capacity | 8,000 – 15,000 metric tons for SA612 boiler & pressure vessel steel plates |
GNEE's ASME SA612 Spot Inventory List
| Material Grade | Thickness (mm) | Width (mm) | Length (mm) | Origin Mill |
|---|---|---|---|---|
| SA612 | 8 | 2200 | 12000 | Wuyang Steel |
| SA612 | 10 | 2200 | 12000 | Wuyang Steel |
| SA612 | 12 | 2500 | 12000 | Wuyang Steel |
| SA612 | 16 | 2500 | 12000 | Wuyang Steel |
| SA612 | 22 | 2500 | 12000 | Wuyang Steel |
| SA612 | 26 | 2500 | 12000 | Wuyang Steel |
| SA612 | 28 | 2200 | 12000 | Wuyang Steel |
| SA612 | 30 | 2200 | 12000 | Wuyang Steel |
| SA612 | 38 | 2500 | 12000 | Wuyang Steel |
| SA612 | 40 | 2500 | 12000 | Wuyang Steel |
| SA612 | 40 | 2500 | 12000 | Wuyang Steel |
| SA612 | 40 | 2200 | 12000 | Wuyang Steel |
| SA612 | 45 | 2500 | 12000 | Wuyang Steel |
| SA612 | 50 | 2200 | 12000 | Wuyang Steel |
| SA612 | 50 | 2200 | 12000 | Wuyang Steel |
Note：Inventory is for reference only. For detailed inventory and pricing, please click below to contact us.
Contact us today for the latest inventory and pricing information
Highlights & Benefits of ASME SA612 Vessel Steel Plates
Superior Yield Strength: With a minimum yield strength of 50 ksi (345 MPa), SA612 offers significantly higher strength than standard SA516 Grade 70, allowing for thinner plate designs.
Weight Reduction & Cost Efficiency: By using thinner SA612 plates without compromising safety, manufacturers can reduce the overall weight of the vessel, lowering material and shipping costs.
Excellent Notch Toughness: Specifically processed for fine-grain structure, ensuring high resistance to brittle fracture in lower temperature applications.
Optimized Weldability: Low carbon equivalent (CE) ensures the material maintains its properties after high-heat welding processes common in boiler fabrication.
Common Applications
• Power Plant Boilers: Steam drums, headers, water-cooled furnace walls, etc.
• Petrochemicals: Reactors, heat exchangers, towers, spherical tanks (LPG, oxygen, and nitrogen storage tanks), and oil storage tanks.
• Coal Chemical Industry: Coal gasifiers, scrubbers, shift reactors.
• Fine Chemicals: Various pressurized reactors and storage tanks.
• Nuclear Power Equipment: Containment vessels, pressurizers, steam generator supports, etc. (subject to more specific nuclear-grade standards).
• Transportation: Gas cylinders/liquid tanks for rail tank cars and road tankers.
ASME SA612 vs SA516 Grade 70
| Material Type | Kohlenstoffstahl | Manganese Silicon Alloy Steel |
| Zugfestigkeit | 485-620 MPa | 570-725 MPa |
| Streckgrenze | Minimum 260 MPa | Minimum 345 MPa |
| Impact Test Temperature | -29°C | -40°C |
| Typical Applications | Fixed Storage Tanks | Mobile LPG Tankers, Pressure Vessels |
| Weight Reduction Potential | Standard | Up to 16% Weight Saved |
If any of the following conditions apply, prioritize SA612:
SA612 has a yield strength 32.69% higher than SA516 Gr.70. Under the same design pressure and dimensions, its wall thickness can be reduced by 25%, thereby lowering the overall weight of the equipment by 14% to 16%.
SA612 offers a higher tensile strength range and a greater safety margin against burst failure. It effectively resists deformation under frequent pressure changes, extending service life and reducing long-term maintenance risks.
Requires a low-temperature operating environment,A612 maintains stable impact toughness at -40°C, far exceeding the -29°C limit of SA516 Gr.70.
SA612 Thinner plates reduce weld depth, welding wire consumption, and welding time, thereby significantly improving workshop production efficiency in batch container manufacturing.
SA612 Lighter finished containers simplify the selection of lifting equipment, reduce road transport restrictions, and save on on-site construction costs.
Success Stories
See how our ASME SA612 steel plate has helped clients achieve significant improvements in their operations.
Mining Project High-Pressure Vessels
Challenge
A mining project in Peru required high-pressure air tanks with 40mm thick plates, but faced challenges with local processing capabilities and tight deadlines.
Solution
We provided complete solution including 40mm thick ASME SA612 plates with CNC cutting, rolling, and beveling services, delivered ready for welding.
Results
By providing pre-processed plates, we saved the client 3 weeks of production time and eliminated the need for expensive local outsourcing. The high strength of SA612 also ensured the pressure vessels met the demanding operational requirements of the mining environment.
GNEE have extensive experience in export projects and can provide high-quality ASME SA612 steel plates to meet your needs. If you have any requests, please feel free to contact us at any time; we will do our utmost to meet your requirements.
Whether you need standard or custom products, we can provide high-quality products and professional services to help you reduce costs and improve project efficiency.
Contact us right away to discuss your needs
Certificate Transparency (MTC & Certification):
Clearly state: "We provide full Mill Test Certificates (MTC) in accordance with EN 10204 3.1, including Charpy V-notch impact testing and Ultrasonic Testing (UT) per SA435/SA578."
Value-Added Services:List the machining services you can provide, such as: Precision CNC Flame Cutting, Beveling, Bending, and Rolling.
Surface Treatment
We provide shot blasting, grinding, rust removal for SA612 pressure vessel components. These treatment processes meet various corrosion protection grade standards and are suitable for indoor, outdoor, and low-temperature operating environments for SA612 storage tanks and boiler equipment.
Packaging and shipping
- Waterproof & Moisture-Proof Packaging: Wrapping with oil paper plus plastic film sealing
- Export Fumigation-Free Wooden Pallet Packaging
- Steel Frame Reinforced Packaging
- Container Loading
- Bulk Shipment: Suitable for extra-long, extra-wide and overweight components
FAQ:
1. Are ASME SA612 and ASTM A612 the same?
Yes, they are the same steel grade, with identical chemical composition and mechanical properties.
ASTM A612/A612M: A raw material standard published by ASTM International that specifies the chemical composition, tensile strength, impact strength, and thickness limits for steel plates.
ASME SA612/SA612M: ASTM A612 has been fully incorporated into ASME BPVC, Volume II, Part A; the "SA" prefix indicates that it has been certified under the ASME Pressure Vessel Code.
2. Can SA612 be used for storage tanks?
Yes, it is widely recognized for use in pressure storage tanks. It is suitable for spherical liquefied petroleum gas (LPG), ammonia, and carbon dioxide storage tanks; medium-pressure cryogenic storage tanks (liquefied natural gas, liquid nitrogen, with minimum temperatures down to -40°C); pressure buffer tanks; flash tanks; and process fluid storage tanks.
3. What is the available thickness range for GNEE's SA612?
According to ASTM/ASME basic rules: 6 mm to 25 mm.
Specialized steel mills can supply plates with thicknesses ranging from 6 mm to 100–150 mm; some mills can provide plates up to 200 mm thick. Specific thicknesses must be determined based on technical agreements, and plates thicker than 25 mm require additional impact testing and non-destructive testing.
Common stock thicknesses: 8, 10, 12, 14, 16, 20, 22, and 25 mm.
4. Does SA612 require heat treatment?
Normalizing is a mandatory requirement for the standard delivery condition. Heat to 890–940°C, hold for 1.5–2.5 minutes per millimeter of thickness, and allow to cool naturally to room temperature.