HP345 steel plate is a high-strength low-alloy steel developed under the GB/T 6653 standard, specifically designed for welded gas cylinders and pressure vessels.
HP345 steel plate
It is widely used in applications such as LPG cylinders, industrial gas cylinders, and high-pressure storage tanks, where safety and pressure resistance are critical.
Compared with lower-grade steels, HP345 offers a better balance of strength, toughness, and manufacturability, making it suitable for modern gas storage requirements.
Chemical Composition of HP345 steel plate
The performance of HP345 steel plate is largely determined by its controlled chemical composition:
| Element | C | Si | Mn | P | S | Al |
|---|---|---|---|---|---|---|
| Content (%) | ≤0.20 | ≤0.35 | ≤1.50 | ≤0.025 | ≤0.015 | ≥0.015 |
Mechanical and Physical Properties of HP345 steel plate
HP345 steel plate delivers stable and reliable performance for pressure applications:
| Property | Value |
|---|---|
| Yield Strength | ≥345 MPa |
| Tensile Strength | 510–620 MPa |
| Elongation | ≥17–21% |
| Impact Toughness | Good (suitable for normal temperature conditions) |
Key Advantages of HP345 Steel Plate
HP345 is widely selected because of the following benefits:
- High Strength: Suitable for medium and high-pressure gas cylinders
- Excellent Weldability: Easy to process without compromising joint quality
- Good Formability: Ideal for stamping, rolling, and cylinder forming
- Stable Performance: Consistent quality across batches
- Cost Efficiency: Better long-term value compared to lower-grade steels:
HP345 provides a balanced solution between performance, safety, and cost, making it a preferred material in the gas cylinder industry.
How to Choose and Purchase HP345 Steel Plate
When selecting HP345 steel plate, consider the following factors:
| Factor | Recommendation |
|---|---|
| Thickness & Size | Based on cylinder design and pressure requirements |
| Heat Treatment | Normalized or Q+T depending on performance needs |
| Certification | Ensure EN 10204 3.1 or equivalent |
| Surface Condition | Clean surface for welding and forming |
| Supplier Capability | Stable supply and quality control system |
What We Can Supply
As a professional steel supplier, we provide comprehensive HP345 solutions:
| Product | Details |
|---|---|
| Product Form | Steel plates and coils |
| Thickness | 1.6mm – 12mm |
| Width | 800mm – 1630mm |
| Length | 3000mm – 18000mm or customized |
| Delivery Condition | Hot rolled / Normalized / Q+T |
| Processing Services | Cutting, welding, shot blasting, painting |
| Inspection | UT, impact test, third-party inspection |
HP345 gas cylinder steel plate is a high-performance, reliable, and cost-effective material for gas storage applications.
From its optimized chemical composition to its excellent mechanical properties, HP345 ensures safety, durability, and efficient manufacturing.
For manufacturers aiming to improve product quality and meet stricter safety standards, HP345 is the ideal choice.
Contact now to get HP 345 Gas Welded Cylinder Steel Plate Quote
If you are sourcing HP345 steel plate, provide your specifications including thickness, width, quantity, and delivery port. A complete quotation and technical support can be arranged to help you select the most suitable material for your project.
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.
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.
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.