HP265 and HP345 steel plates are both widely used under the GB/T 6653 standard for welded gas cylinders and pressure vessels. They share good weldability and formability, but differ significantly in strength level, pressure resistance, and application range.
HP345 steel plates
For manufacturers requiring higher safety performance and load-bearing capacity, HP345 steel plate is generally the more suitable choice.
Overview of HP265 and HP345
| Property | HP265 Steel Plate | HP345 Steel Plate |
|---|---|---|
| Yield Strength | ≥265 MPa | ≥345 MPa |
| Tensile Strength | 410–530 MPa | 510–620 MPa |
| Strength Level | Medium–Low | Medium–High |
| Pressure Resistance | Lower | Higher |
| Application Range | Low-pressure cylinders | Medium & high-pressure cylinders |
| Cost | Lower | Higher |
The most notable difference is the increase in yield strength of HP345, which significantly improves resistance to deformation and internal pressure.
Mechanical Performance of HP265 and HP345
HP265 steel plate is typically used for applications where pressure requirements are relatively low. It provides adequate strength for standard gas cylinders but has limitations in high-stress environments.
In contrast, HP345 steel plate offers superior mechanical performance, including higher yield strength and tensile strength, allowing it to perform reliably under higher pressure and more demanding service conditions.
| Property | HP265 | HP345 |
|---|---|---|
| Yield Strength | ≥265 MPa | ≥345 MPa |
| Tensile Strength | 410–530 MPa | 510–620 MPa |
| Elongation | ≥24% | ≥17–21% |
Application of HP265 and HP345
| Application Type | HP265 | HP345 |
|---|---|---|
| Small LPG Cylinders | Suitable | Suitable |
| Standard Gas Cylinders | Suitable | Suitable |
| Industrial Gas Cylinders | Limited | Widely used |
| High-Pressure Gas Storage | Not recommended | Recommended |
| Vehicle Gas Tanks | Not suitable | Suitable |
| Pressure Vessels | Basic | Medium to high-pressure |
HP265 is mainly used for small or low-pressure gas cylinders, while HP345 is preferred for industrial and higher-pressure applications where safety requirements are stricter.
Processing for HP265 and HP345
Both materials offer good fabrication properties, which are essential for cylinder manufacturing:
| Feature | HP265 | HP345 |
|---|---|---|
| Weldability | Good | Good |
| Formability | Excellent | Excellent |
| Processing Difficulty | Low | Low |
Even with higher strength, HP345 steel plate maintains good weldability and forming performance, ensuring efficient production without significant processing challenges.
HP265 and HP345 steel plates serve similar purposes in gas cylinder manufacturing, but differ significantly in performance.
- HP265 is suitable for low-pressure and cost-sensitive applications
- HP345 is the preferred choice for higher pressure, improved safety, and better long-term performance
For manufacturers aiming to enhance product quality and meet stricter safety standards, HP345 steel plate is the recommended solution.
For a reliable supply of HP345 gas cylinder steel plate, provide your specifications such as thickness, width, quantity, and delivery destination. A detailed quotation and technical support can be provided to meet your project requirements.
Contact now to get HP345 Steel Plate Quote
What is HP345 steel plate?
HP345 steel plate is a high-performance steel specifically designed for manufacturing welded pressure vessels, including LPG and industrial gas cylinders. It complies with the GB/T 6653 standard and offers a balanced combination of strength, ductility, and weldability, making it ideal for safe and durable cylinder production.
What should be considered when selecting HP345 steel?
When choosing HP345 steel, consider cylinder pressure rating, wall thickness, welding method, and environmental exposure. While HP345 provides superior strength, proper fabrication, inspection, and handling are crucial to fully leverage its mechanical and safety advantages.
What should be considered when selecting HP345 steel?
When choosing HP345 steel, consider cylinder pressure rating, wall thickness, welding method, and environmental exposure. While HP345 provides superior strength, proper fabrication, inspection, and handling are crucial to fully leverage its mechanical and safety advantages.
What are the benefits of using HP345 steel for gas cylinders?
Using HP345 steel ensures enhanced safety, long-term durability, and compliance with GB/T 6653 standards. Its high strength allows for thinner walls while maintaining pressure resistance, which reduces material cost and weight without compromising safety. It also provides consistent performance in industrial and outdoor environments.
Does HP345 gas cylinder steel support third-party inspection?
Absolutely. GNEE supplies HP345 gas cylinder steel with full traceability and supports inspections from globally recognized agencies to meet project and tender requirements.
What is the difference between HP345 gas cylinder steel and HP295?
Compared to HP295, HP345 gas cylinder steel offers higher strength and better pressure resistance, making it more suitable for demanding applications and reducing material thickness requirements.
How does GNEE ensure the quality of HP345 gas cylinder steel?
GNEE implements strict quality control from raw materials to final inspection, including ultrasonic testing and mechanical property verification for HP345 gas cylinder steel.
Is HP345 gas cylinder steel suitable for export projects?
Yes, HP345 gas cylinder steel from GNEE is widely exported and meets international project requirements in regions such as the Middle East, Southeast Asia, and South America.