Product Overview
ASTM A612/ A612M Pressure Vessel Steel Plate is a carbon-manganese-silicon steel plate designed for welded pressure vessels and industrial equipment requiring reliable strength and toughness. Manufactured according to ASTM A612 / A612M requirements, the plate is commonly used in pressure vessels, storage tanks, boilers, heat exchangers, and petrochemical equipment.
Technical Specifications
ASTM A612M Steel Plate Chemical Composition
|
ASTM A612 |
C % |
Si % |
Mn % |
P % |
S % |
Cu |
Ni |
Cr |
Mo |
V |
|
Heat analysis |
0.25 |
0.15-0.50 |
1.00-1.50 |
0.025 |
0.025 |
0.35 |
0.25 |
0.25 |
0.08 |
0.08 |
|
Product analysis |
0.29 |
0.13-0.55 |
0.92-1.62 |
0.038 |
0.038 |
0.38 |
0.28 |
0.29 |
0.09 |
0.09 |
ASTM A612M steel plate mechanical properties
|
Thickness |
0.5in [12.5mm] and under |
Over 0.5in. to 1in.[Over 12.5 to 25mm] |
|
Tensile strength, ksi [MPa] |
83-105 [570-725] |
81-101 [560-695] |
|
Yield strength,min,ksi [MPa] |
50 [345] |
50 [345] |
|
Elongation in 8in. [200mm], min, % |
16 |
16 |
|
Elongation in 2in. [50mm], min, % |
22 |
22 |
Cross Reference / Comparable Grades
|
Standard |
Equivalent Grade |
Description |
|
EN 10028-2 |
P355GH / P355NH |
Pressure vessel steel with similar strength level |
|
DIN 17155 |
19Mn6 (or P355GH / 1.0473) |
Carbon steel with good toughness |
|
JIS G3115 |
SPV355 / SB450 |
Boiler and pressure vessel steel |
|
GB 713 |
Q345R |
Pressure vessel steel with good strength |
Note: Property equivalencies are for reference only. Exact suitability depends on heat treatment condition and specific impact requirements.
Core Product Advantages
Engineered from fine-grain killed carbon-manganese-silicon steel to deliver reliable notch toughness down to -40°C (or lower with supplementary impact requirements) for LPG and gas storage vessels.
Provides a minimum yield strength of 345 MPa (50 ksi) for plates up to 25 mm, enabling thinner wall designs and reduced overall vessel weight.
Features a maximum 0.25% carbon content and controlled carbon equivalent to minimize heat-affected zone cracking during field welding and forming.
Processed via LF refining and vacuum degassing to lower inclusion levels and maintain consistent internal cleanliness.
Available Supplementary Requirements (ASTM A20 / A20M)
S1 – Vacuum Treatment: Vacuum degassing for ultra-clean steel requirements.
S3 – Simulated Post-Weld Heat Treatment (PWHT): Mechanical testing after PWHT coupon treatment.
S5 – Charpy V-Notch Impact Test: Low-temperature impact testing performed at specified design temperatures (e.g., -20°C, -40°C).
S8 – Ultrasonic Examination: UT testing in accordance with ASTM A435 or ASTM A578 (Level A, B, or C).
S12 – Maximum Tensile Strength Limit: Customized upper limits on tensile properties.
Processing Services
Precision Cutting: CNC flame cutting, plasma cutting, and custom sizing based on client engineering drawings.
Weld Edge Preparation: Precision edge beveling (V, X, Single-U, or Double-U grooves) ready for immediate site welding assembly.
Surface Treatment & Protection: Automated shot blasting to SA 2.5 finish followed by the application of weldable, temporary rust-inhibitive shop primers for long-distance maritime shipping protection.
Heat Treatment & Delivery Conditions
As-Rolled (AR): Standard supply state for general ambient temperature pressure vessels.
Normalized (N): Strongly recommended for thick sections or low-temperature services to refine grain structure and maximize impact energy.
Stress Relieved (SR) / PWHT: Applied to eliminate residual stresses introduced during severe cold forming or heavy welding operations.
Quality Assurance & Compliance
Ultrasonic Testing (UT) Available: Ultrasonic inspection in accordance with ASTM A435 or ASTM A578 Level A/B/C is available upon request to guarantee internal soundness.
Full Traceability: Hard-stamping and painted markings display the Heat Number, Plate Number, and ASTM standard on each individual plate.
Mill Certification: Supplied with original EN 10204 3.1 Mill Test Certificates detailing heat chemistry and mechanical test results.
Third-Party Inspection: Factory audits and pre-shipment inspections by SGS, BV, TÜV, or Intertek are supported.
Packaging, Logistics & Export Handling
Surface Protection: Anti-rust oil or temporary shop primer applied prior to packing.
Bundling & Securement: High-tensile steel strapping with plastic corner protectors to prevent edge damage.
Waterproof Packaging: Multi-layer plastic film wrapping and heavy-duty waterproof covers for break-bulk or container loading (20ft / 40ft Open Top / Frame Containers).
FAQ
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