As a leading professional manufacturer and exporter of pressure vessel steel in China, GNEE Steel provides high-performance GB6653 HP325 steel coils/sheets/plates for gas cylinder production to clients worldwide.
With over 18 years of industry expertise, our factory is equipped with state-of-the-art rolling mills and rigorous testing laboratories to ensure every ton of steel meets the highest safety standards. We understand that in the gas cylinder industry, material reliability isn't just a requirement-it's a life-saving necessity.
Whether you need hot-rolled coils for automated production lines or precision-cut sheets, GNEE Steel is your trusted partner for high-strength HP325 materials.
GNEE Steel's advanced hot-rolling production line processing high-quality HP325 steel coils
Overview of GB6653 HP325 Steel Coils/Sheets/Plates for Gas Cylinder
The GB6653 HP325 steel coils/sheets/plates for gas cylinder are specialized carbon steel products governed by the Chinese national standard GB 6653. This grade is specifically designed for the manufacture of welded gas cylinders, such as those used for Liquefied Petroleum Gas (LPG).
The "HP" designation stands for "Heping" (the Chinese Pinyin for pressure vessel), while "325" denotes the minimum yield strength requirement of 325 MPa. At GNEE Steel, we ensure that our HP325 material possesses a fine-grained structure and excellent surface quality, which are critical for the deep drawing and forming processes used by cylinder manufacturers.
Technical Specifications and Chemical Composition of HP325 Steel
The reliability of HP325 steel coils/sheets/plates begins with a strictly controlled chemical composition. In the production of gas cylinders, the steel must exhibit excellent weldability and resistance to atmospheric corrosion.
GNEE Steel utilizes advanced vacuum degassing and refining techniques to minimize the presence of harmful impurities like Phosphorus (P) and Sulfur (S). Reducing these elements is vital to preventing cold shortness and ensuring the structural integrity of the cylinder during its 15-to-20-year service life.
Chemical Composition Analysis (GB6653 Standard):
| Element | Content (%) |
| Carbon (C) | ≤ 0.20 |
| Manganese (Mn) | 0.30 – 0.90 |
| Silicon (Si) | ≤ 0.05 |
| Phosphorus (P) | ≤ 0.025 |
| Sulfur (S) | ≤ 0.015 |
Mechanical Properties of GB6653 HP325 Steel Plates for Gas Cylinder
When selecting GB6653 HP325 steel plates for gas cylinder manufacturing, the mechanical properties are the most significant factor. The material must provide a high safety factor against bursting while remaining flexible enough for the stamping process.
Yield Strength and Tensile Performance
Our HP325 steel offers a stable yield strength (≥325 MPa) and a tensile strength ranging from 490 to 610 MPa. This specific range ensures that the cylinder can withstand high internal pressures without permanent deformation or catastrophic failure.
Elongation and Formability
With an elongation rate of ≥22%, our HP325 steel coils and sheets provide superior deep-drawing performance. This allows manufacturers to press the steel into "cups" (cylinder halves) without thinning the walls excessively or causing surface cracks.
HP325 steel plate at the GNEE Steel quality control center
Key Applications of HP325 Steel Coils and Sheets
The versatility of GB6653 HP325 steel coils/sheets/plates for gas cylinder makes it the primary choice for various pressurized storage solutions.
LPG (Liquefied Petroleum Gas) Cylinders: The most common application for HP325. It is used for both domestic cooking cylinders and industrial fuel tanks.
Dissolved Acetylene Cylinders: Due to its excellent weldability, HP325 is used to create the outer shells of acetylene tanks.
Low-Pressure Liquefied Gas Containers: Including tanks for liquid ammonia, chlorine, and other industrial gases that require a reliable pressure-rated vessel.
Air Compressor Tanks: Small to medium-sized air receiver tanks often utilize HP325 sheets for their durability and cost-efficiency.
Why GNEE Steel is the Leading HP325 Steel Plate Manufacturer
Choosing the right supplier for GB6653 HP325 steel coils/sheets/plates for gas cylinder is critical for maintaining your production quality. GNEE Steel offers several distinct advantages:
Standard Compliance: We strictly follow the GB6653-2008 standards. Upon request, we can also provide equivalent grades like EN10120 P265NB or JIS G3116 SG325.
Full Range of Sizes: We supply thicknesses from 2.0mm to 12mm and widths up to 2000mm in both coil and plate form.
Advanced Testing: Every order undergoes ultrasonic testing (UT), tensile testing, and charpy impact testing to ensure zero defects.
One-Stop Processing: GNEE provides value-added services, including decoiling, precision slitting, and shot-blasting/painting, to save you time and cost.
Technical Parameters Table for GB6653 HP325
| Attribute | Specification Details |
| Grade | HP325 (GB6653) |
| Type | Hot Rolled Steel Coil / Sheet / Plate |
| Thickness | 2.0mm - 12.0mm |
| Width | 1000mm - 2000mm |
| Length | 2000mm - 12000mm (or Coil) |
| Surface Treatment | Bare, Oiled, or Painted/Primer Coated |
Securely packaged HP325 steel coils in the GNEE warehouse
The GNEE Steel Quality Assurance Process
To maintain our status as a top-tier supplier of GB6653 HP325 steel coils/sheets/plates for gas cylinder, we implement a multi-stage quality control system.
- Raw Material Sourcing: We only use high-quality slabs from reputable state-owned mills.
- Rolling Control: Computerized temperature control during the hot-rolling process ensures a uniform grain structure.
- Third-Party Inspection: We welcome inspections from SGS, BV, or Lloyd's Register to verify the chemical and mechanical integrity of our HP325 products.
- Export Packaging: We use heavy-duty waterproof paper and steel strapping to ensure your plates and coils arrive at your facility in pristine condition, free from rust or physical damage.
Conclusion: Get the Best Quote for GB6653 HP325 Steel Coils/Sheets/Plates
In the competitive world of pressure vessel manufacturing, the quality of your raw material determines the safety and reputation of your brand. GB6653 HP325 steel coils/sheets/plates for gas cylinder from GNEE Steel provide the durability, formability, and high yield strength required to produce world-class gas containers. With our massive inventory and factory-direct pricing, we help you reduce costs without ever compromising on safety.
Are you looking for a reliable supplier of HP325 steel? Contact the GNEE Steel technical team today! We provide free samples, detailed Mill Test Certificates (MTC), and customized logistics solutions for all your pressure vessel steel needs.
FAQ
Q: Why is HP325 preferred over HP295 for larger gas cylinders?
A: HP325 offers higher yield strength than HP295, allowing manufacturers to use thinner steel plates without compromising safety. This reduces the overall weight of the cylinder and saves on material costs.
Q: How does the price of GNEE's HP325 compare to international SG295 steel?
A: As a China-based manufacturer, GNEE offers HP325 at highly competitive factory-direct prices compared to SG295, while providing identical or superior mechanical performance.
Q: Can using HP325 steel plates help reduce the weight of an LPG cylinder?
A: Yes, the increased strength-to-weight ratio of HP325 allows for thinner wall designs compared to lower-grade carbon steels, which can lead to significant savings in logistics and material usage.
Q: How many 12.5kg cylinders can I produce from one ton of HP325 steel?
A: While it depends on your specific design and blanking efficiency, you can generally produce between 65 and 75 cylinder bodies from one ton of 2.5mm or 3.0mm HP325 steel.
Q: Is HP325 more cost-effective than standard carbon steel for gas containers?
A: While the initial price per ton may be higher than standard carbon steel (like Q235B), HP325 is much safer and specifically certified for pressure, reducing the risk of catastrophic failure and legal liability.
Q: Does GNEE provide HP325 steel in "Pickled and Oiled" (P&O) condition?
A: Yes, we can offer pickled and oiled HP325 if your production line requires a surface free of iron oxide, which helps extend the life of your stamping dies.
Q: What is the benefit of the manganese (Mn) content in HP325 steel?
A: The manganese content (0.60-1.50%) in HP325 significantly enhances the steel's strength and hardenability while maintaining excellent toughness and welding characteristics.
Q: Can HP325 steel be used for high-pressure air compressor tanks?
A: Yes, its pressure-bearing properties make it an excellent and cost-effective choice for small to medium-sized air compressor tanks and other industrial vessels.
Q: How does the sulfur content in HP325 affect the quality of the final cylinder?
A: By keeping sulfur extremely low (≤ 0.015%), GNEE ensures that the HP325 steel has fewer inclusions, which improves the integrity of the welded seams and the overall safety of the cylinder.
Q: Why choose GNEE over other Chinese suppliers for HP325 steel?
A: GNEE combines 18+ years of export experience with state-of-the-art manufacturing, professional third-party quality verification, and dedicated technical support for your cylinder production line.
