Gnee Steel (Tianjin) Co., Ltd. is one of the most professional astm a612 high strength carbon steel plate for pressure vessel applications manufacturers and suppliers in China, also supports customized service. If you're going to buy astm a612 high strength carbon steel plate for pressure vessel applications made in China, welcome to get free sample from our factory. Quality products and low price are available.
ASTM A612 is fully killed C-Mn-Si steel plate, engineered for welded pressure vessels operating under medium and low temperature service conditions. The grade delivers balanced high tensile strength, consistent cryogenic toughness and weld compatibility, specified for use within petrochemical, power generation and natural gas storage & transport sectors.
ASTM A612 High Strength Carbon Steel Plate
- Full Name: Standard Specification for Pressure Vessel Plates, Carbon Steel, High Strength, for Moderate and Lower Temperature Service ASTM International.
- Designation: ASTM A612 (inch-pound units) / ASME SA612M (metric units) ASTM International.
- Current Version: ASTM A612/A612M-20 (approved May 1, 2020).
- Scope: Covers killed carbon-manganese-silicon steel plates for welded pressure vessels in moderate and lower temperature service ASTM International.
Technical Specifications of ASTM A612 Carbon Steel Plate
| Item | Technical Details & Specifications |
| Executing Standard | ASTM A612 / A612M, ASME SA612 |
| Typical Thickness Range |
6.0 mm – 25.4 mm (0.25" – 1.00") (Note: A612 is specifically designed for plates up to 1 inch thick) |
| Width & Length Range |
Width: 1500mm – 3500mm Length: 6000mm – 12000mm (Customizable) |
| Dimensional Tolerance |
According to ASTM A20 / A20M (Standard Requirement for Pressure Vessel Plates) |
| Delivery Condition |
• As-rolled (Standard) • Normalized (For improved notch toughness) • Stress Relieved (SR) • TMCP (Thermo-Mechanical Controlled Processing) |
| Surface Treatment |
• Mill Finish (Standard) • Shot Blasting (ISO SA 2.5 standard) • Priming (Anti-corrosion weldable primer) • Oiled (For rust prevention) |
| Edge Finish | Mill Edge or Trimmed/Cut Edge |
| Testing Services |
• Ultrasonic Testing (UT) per ASTM A435/A578 • Charpy V-Notch Impact Test (at specific temperatures) • Product Analysis (Chemical & Mechanical) • Third-Party Inspection (SGS, BV, TUV, etc.) |
| Certification | EN 10204 3.1 Material Test Certificate (MTC) |
Mill Test Certificate (MTC) and Ultrasonic Testing (UT)
GNEE Steel will provide high-quality steel plate services that meet the ASTM A612 specification based on your needs. We ensure the smooth operation of our ASTM A612 steel plate business. Please feel free to contact us with any requests; we will do our utmost to meet your needs.
ASTM A612 Chemical Composition
| Element | Content (%) |
|---|---|
| Carbon (C), max | 0.25 |
| Manganese (Mn) | 1.00-1.50 |
| Phosphorus (P), max | 0.025 |
| Sulfur (S), max | 0.025 |
| Silicon (Si) | 0.15-0.50 |
| Copper (Cu), max | 0.35 |
| Nickel (Ni), max | 0.25 |
| Chromium (Cr), max | 0.25 |
| Molybdenum (Mo), max | 0.08 |
| Vanadium (V), max | 0.08 |
ASTM A612 Mechanical Properties
| Property | Thickness ≤12.5mm | Thickness 12.5-25mm |
|---|---|---|
| Tensile Strength | 570-725 MPa (83-105 ksi) | 560-695 MPa (81-101 ksi) |
| Yield Strength, min | 345 MPa (50 ksi) | 345 MPa (50 ksi) |
| Elongation in 200mm, min | 16% | 16% |
| Elongation in 50mm, min | 22% | 22% |
Why Choose ASTM A612 for Your Pressure Vessel Projects?
1.Weight Optimization
ASTM A612 is a high-strength carbon steel with a minimum yield strength of 345 MPa (50 ksi), which is significantly higher than that of traditional A516 Grade 70 steel plates.While meeting the design stress requirements of the ASME Boiler and Pressure Vessel Code (BPVC), A612 allows for the design of vessels with thinner walls.
2. Excellent Weldability
In pressure vessels, welds are the weakest link in the structure. ASTM A612 features strictly controlled chemical composition, particularly the optimization of carbon equivalent (CEQ). The low-carbon-equivalent design significantly reduces the risk of hardening and cold cracking in the heat-affected zone (HAZ) during welding.
Welding Methods:
- Submerged Arc Welding (SAW),
- Gas Metal Arc Welding (GMAW),
- Shielded Metal Arc Welding (SMAW)
A612 demonstrates excellent process adaptability, ensuring high consistency between the weld and the base metal and meeting stringent radiographic testing standards.
ASTM A612 steel Processing Value-added Services
3. Impact Resistance
ASTM A612 exhibits outstanding Charpy V-notch (CVN) impact energy performance. Through fine-graining treatment, it maintains good toughness even at lower temperatures.
This high toughness effectively absorbs energy and inhibits the propagation of microcracks, thereby preventing catastrophic brittle failure of vessels under extreme operating conditions, making it an ideal choice for storing flammable and explosive media such as LPG (liquefied petroleum gas).
4. Superior Surface Quality
We understand that complex post-production surface treatments can slow down our customers' production cycles. To address this, we offer customized surface treatment solutions:
• Shot Blasting: Strictly adhering to the ISO SA 2.5 standard, this process removes scale and rust to expose the bare metal, facilitating accurate ultrasonic testing (UT) and laying the foundation for subsequent processing.
• Shop Priming: An anti-corrosion welding primer is available as an option. This protective coating ensures the steel plates remain rust-free during ocean transport and outdoor storage at the customer's site, without compromising the quality of subsequent welding operations.
Common applications for ASTM A612 Steel Plates
Main Applications:
Manufacturing of Medium- and Heavy-Gauge Steel Storage Tanks
ASTM A612 performs consistently in the medium-to-thick plate range (approximately 6–50 mm) and is particularly suitable for:
- Rolled storage tank cylinders
- Head and shell structures
- Large welded process vessels
Widely Used in Process Equipment Systems
ASTM A612 is commonly used in the following types of equipment:
- Chemical storage tanks and reaction vessels
- Liquid ammonia and LPG storage systems
- Separators and heat exchanger process vessels
- Petrochemical pressure equipment
- Medium- and low-temperature process equipment
Medium- and Heavy-Gauge Steel Storage Tanks
For storage tanks and process vessels, a significant portion of the structure is fabricated through welding rather than being forged or cast as a single piece; therefore, the microstructural stability, crack sensitivity, and ability to maintain post-weld properties in the heat-affected zone (HAZ) are critical.
Under proper welding process control, ASTM A612 maintains relatively stable HAZ properties and is not prone to significant hardening or sudden drops in toughness, making it highly reliable for large-scale on-site welded storage tanks and pressure vessels.
At the same time, it exhibits good performance consistency across a range of medium thicknesses. This means that during the rolling of cylinders, the forming of heads, and multi-pass welding processes, the material does not experience a significant decline in performance due to increased thickness, thereby ensuring the safety margin of the overall structure.
This is particularly important for large chemical storage tanks, liquid ammonia storage tanks, and process separation vessels.
How to Select ASTM A612 Steel Plates for Pressure Vessel Projects
| Property | ASTM A612 | ASTM A516 Gr70 |
|---|---|---|
| Yield Strength | Higher | Lower |
| Weldability | Excellent | Excellent |
| Low Temperature Toughness | Better | Good |
| Cost | Higher | Lower |
| Application | Pressure Vessel | General PVQ |
| Grade | Steel Type | Strength Level | Low-Temperature Toughness | Weldability | Cost Level | Typical Application |
|---|---|---|---|---|---|---|
| ASTM A612 | Carbon-Manganese-Silicon Steel | Medium | Good | Excellent | Medium | General pressure vessels, boilers |
| ASTM A516 Gr.70 | Carbon Steel PVQ Plate | Medium-High | Good | Excellent | Low-Medium | Storage tanks, pressure vessels |
| ASTM A537 Cl.1 | Heat-Treated Pressure Vessel Steel | High | Good | Good | Medium-High | High-pressure vessels |
| ASTM A204 Gr.B | Mo-Alloy Pressure Vessel Steel | High | Very Good | Good | High | Elevated-temperature service |
| ASTM A387 Gr.11 | Cr-Mo Alloy Steel | Very High | Good | Moderate | High | High-temperature pressure vessels |
Therefore, for pressure vessels, storage tanks, separators, heat exchangers, and boiler components operating under normal medium- and low-temperature conditions, ASTM A612 remains a highly practical and cost-effective material choice.
GNEE Specifications for ASTM A612 Steel Plates
ASTM A612/A612M Standard Stock Inventory List
| Thickness (mm) | Standard Width (mm) | Standard Length (mm) | Minimum Stock Tonnage |
|---|---|---|---|
| 8 | 1500 / 1800 | 6000 / 8000 | ≥ 50 MT |
| 10 | 1500 / 1800 | 6000 / 8000 | ≥ 80 MT |
| 12 | 1500 / 2000 | 6000 / 9000 | ≥ 100 MT |
| 14 | 1500 / 2000 | 6000 / 9000 | ≥ 60 MT |
| 16 | 1500 / 2000 | 6000 / 10000 | ≥ 120 MT |
| 20 | 1800 / 2200 | 6000 / 10000 | ≥ 150 MT |
| 25 | 1800 / 2200 | 6000 / 10000 | ≥ 80 MT |
| 30~50 | 2000 / 2500 | 6000 / 12000 | Stock availability to be confirmed per order |
Selecting the appropriate grade helps ensure safety, compliance, and the long-term reliability of equipment.Suppliers that meet these standards help reduce risks, avoid rework, and support the smooth execution of projects.
Packaging and Delivery
| item | key packaging points for ASTM A612 |
|---|---|
| inner layer | waterproof anti-rust paper |
| edge protection | edge corner guards |
| stacking & binding | anti-scratch pads + steel strapping |
| outer support | fumigated wooden pallets / crates |
| marking | ASTM A612 grade, heat number, size marks |
| extra protection (optional) | full stretch film wrapping |
GNEE Steel supplies complete sizes of ASTM A612 pressure vessel steel plates with full material certifications. Contact us for custom cutting, technical data sheets and fast delivery arrangements.
Why Choose GNEE GROUP ASTM A612 Steel Plate?
Pre-sales Services: We provide free technical consultations, product samples (sample fees are refundable upon placing an order), and customized solution designs tailored to customer project requirements, including material selection and heat treatment recommendations.
Production Services: We provide regular updates on production progress to customers, welcome on-site inspections, and ensure that production strictly adheres to customer requirements and the ASTM A612/A612M standards.
After-Sales Service: We provide Material Test Certificates (MTCs), technical guidance on welding and installation, and resolve any quality issues within 24 hours (if any). We also offer long-term technical support throughout the product's entire lifecycle.
Logistics Services: We partner with professional international logistics companies to provide safe and efficient transportation, and support various trade terms (FOB, CFR, CIF, DDP) and payment methods (letter of credit, wire transfer, PayPal).
Quality Inspection of ASTM A612 Steel Plates
Contact us now for the latest prices on ASTM A612 steel plates
FAQ:
What is the composition of ASTM A612?
ASTM A612 steel plate is a high-strength low-alloy (HSLA) steel plate designed for welded pressure vessels. It has a nominal composition of carbon, manganese, phosphorus, sulfur, silicon, nickel, chromium, molybdenum, and copper.
Is ASTM A612 equivalent to SA612?
Yes. ASTM A612 and ASME SA612 are equivalent pressure vessel steels with similar chemical compositions and mechanical properties, and are suitable for welded pressure vessels.
What is the maximum thickness of ASTM A612 steel plates?
ASTM A612 steel plates are commonly available in thicknesses ranging from 6 mm to 100 mm. Depending on the steel mill's production capacity, thicker plates can also be provided upon customer request.
Does ASTM A612 require post-weld heat treatment (PWHT) after welding?
Post-weld heat treatment is not always required. It depends on the plate thickness, design code requirements, and the specific operating conditions of the vessel.
In which industries is ASTM A612 steel plate commonly used?
ASTM A612 is widely used in industries such as petrochemicals, chemicals, fertilizers, power generation, and pressure vessel manufacturing.
Is ASTM A612 easy to weld?
Yes. ASTM A612 has good weldability and can be welded using common processes such as SMAW, SAW, GMAW, and FCAW.
What inspections and certifications are available for ASTM A612 steel plates?
Common documentation includes EN 10204 3.1 certificates, ultrasonic testing reports, and third-party inspection certificates, which can be provided upon request.
What is the equivalent of ASTM A612 steel?
| Standard | Equivalent Grade | Description |
|---|---|---|
| European Standard (EN) | P265GH | Pressure vessel steel grade with comparable strength |
| German Standard (DIN) | St44-2 / 1.0425 | Carbon steel with excellent toughness |
| Japanese Industrial Standard (JIS) | SB450 | Steel grade for boilers and pressure vessels |
| Chinese National Standard (GB) | Q345R | High-strength steel for pressure vessel applications |