China Customized ASME SA612 Pressure Vessel Steel Plate

In today's petrochemical, energy, and heavy industrial sectors, pressure vessel materials must meet strict mechanical performance, welding, and code compliance requirements. ASME SA612 pressure vessel steel plate is widely recognized as a high-strength, cost-effective solution for moderate and low-temperature pressure applications.

As an experienced steel manufacturer and exporter, GNEE Steel provides China-customized ASME SA612 pressure vessel steel plates, supporting global EPC contractors, fabricators, and pressure vessel manufacturers with stable quality and flexible specifications.

ASME SA612 is a carbon-manganese-silicon steel plate specification designed for welded pressure vessels operating at moderate and lower temperatures. Compared with conventional pressure vessel steels, SA612 offers higher yield strength, allowing engineers to reduce plate thickness while maintaining safety margins.

Size Customization

• Thickness: 6 mm – 300 mm
• Width: up to 4,000+ mm
• Length: customized for large pressure vessel shells and heads

Key Features of SA612 Steel

• High yield and tensile strength
• Good toughness at moderate and low temperatures
• Excellent weldability for pressure vessel fabrication
• Suitable for normalized or controlled rolling delivery
• Fully compliant with ASME Boiler & Pressure Vessel Code (BPVC)

Chemical Composition (mass fraction):

Mechanical Properties:

Yield Strength: ≥345 MPa (50 ksi) across all thicknesses

Tensile Strength: 560-725 MPa (81-105 ksi), depending on thickness

Elongation: ≥20% (varies with thickness)

Impact Resistance: ≥27 J at -40°C (transverse)

Below are present ASME SA612/ SA612M SA612 pressure vessel steel plate stocks.

China-customized ASME SA612 steel plates are widely used in:

High-pressure reactors

Petrochemical and chemical storage tanks

Separators and pressure drums

Heat exchanger shells

Industrial pressure vessels for oil & gas projects

SA612 is especially suitable for projects where higher strength and reduced wall thickness are required without switching to alloy steels.

Founded in 2008, GNEE Steel is a professional supplier of pressure vessel steel plates and fabricated equipment materials, serving customers in over 60 countries.

Our Advantages

• Stable SA612 supply with strict quality control
• Rich export experience for ASME pressure vessel projects
• OEM & ODM support for EPC contractors
• Fast response and technical support team
• Corporate philosophy: "Make progress a little every day"

Request A Quote

If you are looking for a reliable China supplier of ASME SA612 pressure vessel steel plate, GNEE Steel is ready to support your project with custom sizes, stable quality, and full documentation.

📩 Contact us today to get technical support, quotations, or project references for your pressure vessel applications.

Email: ru@gneesteelgroup.com

Whatsapp (WeChat): +86 15824687445

FAQ

What is SA 612 material?

carbon-manganese-silicon steel plate

SA612 is killed carbon-manganese-silicon steel plate made for welded pressure vessels. Its fine grain makes it suitable for use in moderate and lower temperature service where impact resistance is important.

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.

What is A612 steel?

ASTM A612 specification is the Standard Specification for Pressure Vessel Plates, Carbon Steel, High Strength, for Moderate and Lower Temperature Service. ASTM A612 encompasses carbon-manganese-silicon steel plates intended for use in welded pressure vessels for moderate and low temperature service.

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.

What Are the Executive Standards for SA612/A612 Steel Plates? Are There Any Differences Between the ASTM and ASME Versions?

The executive standards are ASTM A612/A612M and ASME SA612. There are no substantial differences in chemical composition and mechanical properties between the two versions; the only variance lies in their applicable code systems.

What Are the Equivalent Grades of SA612/A612 in Chinese and European Standards? Can They Be Used as Direct Substitutes?

Common approximate equivalent grades include EN P355GH, DIN 1.0473, and GB Q345R. However, they cannot be used as direct equivalents. Their suitability must be confirmed in accordance with design specifications and approval requirements.

What Are the Yield Strength and Tensile Strength of SA612/A612? Do They Vary with Different Thicknesses?

The minimum yield strength of SA612 is approximately 260 MPa, and its tensile strength ranges from 485–620 MPa. As the thickness increases, the allowable minimum yield strength may decrease slightly.

What Are the Low-Temperature Impact Energy Requirements for SA612/A612? Are the Requirements at -40℃ and -45℃ Consistent?

Standards typically require impact testing at -40℃, while testing at -45℃ is not mandatory. If a project specifies -45℃ testing, additional impact tests must be conducted and clearly defined in the technical agreement.

What Are the Minimum and Maximum Service Temperatures for SA612/A612?

The recommended minimum service temperature is approximately -40℃, and the maximum operating temperature is generally around 400℃, depending on the design specifications and service medium.

What Is the Carbon Equivalent of ASME SA612? Is Preheating Required for Welding?

The carbon equivalent is usually around 0.42–0.45. Preheating at 50–120℃ is recommended for welding medium and thick plates. Commonly used welding materials include low-hydrogen electrodes such as E7018 and E7016.

What Is the Routine Thickness Range of SA612/A612, and What Is the Maximum Customizable Thickness?

The routine thickness range is 6–100 mm. Some steel mills can provide customized thicknesses up to 150 mm, subject to confirmation of their rolling and heat treatment capabilities.

What Are the Common Delivery Conditions for SA612/A612?

Common delivery conditions include As-Rolled (AR), Normalized (N), and Normalized + Tempered (N+T), with the normalized condition being the most widely used.

What Is the Machinability of SA612? Is It Prone to Cracking?

SA612 exhibits excellent cutting and bending performance. When processed with proper techniques and preheating, it is not prone to cracking.

Which Is More Suitable for Low-Temperature Applications: SA612 or SA516 Gr.70?

SA612 delivers more stable comprehensive performance in thick plate and high-stress working conditions, whereas SA516 Gr.70 offers better cost-effectiveness in conventional operating conditions.

Can Q345R Be Used as a Substitute for SA612?

Q345R can be used as a substitute in some working conditions for non-ASME projects. However, substitution is not recommended for export projects or scenarios where SA612 is explicitly required by specifications.

What Are the Differences Between SA612 and SA537 Cl.2?

SA537 Cl.2 boasts higher strength and low-temperature performance but comes with a significantly higher cost than SA612. It is suitable for more severe operating conditions.

Is SA612 Vessel Plate Suitable for LNG Storage Tanks?

SA612 is not recommended for primary LNG storage tanks operating at -162℃, but it can be used in LNG auxiliary systems or medium-to-low temperature vessels.

What Is the Hydrogen-Induced Cracking (HIC) Resistance of SA612 Steel Plates?

Standard SA612 does not mandate HIC resistance requirements. For applications involving sulfur-containing media, customized low-sulfur and low-phosphorus SA612 plates must be used, accompanied by HIC testing.