In the gas storage and transportation industry, material strength and reliability are critical to ensuring operational safety. High Strength Hot Rolled HP345 Gas Cylinder Steel is specifically designed to meet the demanding requirements of high-pressure gas cylinders, offering superior strength, excellent formability, and outstanding welding performance.
Steel plate rolling line – "Hot rolled steel production line"
We are GNEE, a leading steel manufacturer and global exporter specializing in pressure vessel steels and gas cylinder materials. With over 18 years of experience, advanced production lines, and strict quality control systems, we provide high-performance HP345 steel plates and coils tailored to international market demands. Our solutions help manufacturers improve efficiency, reduce defects, and meet stringent safety standards.
What is High Strength Hot Rolled HP345 Gas Cylinder Steel?
HP345 is a high-strength low-alloy steel developed for manufacturing high-pressure gas cylinders.
Key Characteristics of HP345 Steel
- High yield strength (≥345 MPa)
- Excellent resistance to internal pressure
- Good weldability and forming performance
- Enhanced toughness and fatigue resistance
- Strict chemical composition control
Applicable Standards
- GB/T 6653 gas cylinder steel standard
- Widely used in global LPG and industrial gas markets
- HP345 is ideal for applications requiring higher strength than HP295 while maintaining good processing performance.
High Strength Hot Rolled HP345 Gas Cylinder Steel Chemical Composition
| Element | Content (%) |
|---|---|
| C | ≤0.20 |
| Si | ≤0.55 |
| Mn | 1.20–1.70 |
| P | ≤0.025 |
| S | ≤0.015 |
Composition Advantages
- Optimized carbon content ensures weldability
- Higher manganese improves strength and toughness
- Low impurity levels enhance safety performance
High Strength Hot Rolled HP345 Gas Cylinder Steel Mechanical Properties
|
Yield strength (≥Mpa) |
Tensile strength (Mpa) |
Elongation in ≥,% |
|
|
345 |
510-620 |
<3mm |
≥3mm |
|
17 |
21 |
||
Performance Benefits
- Superior strength for high-pressure applications
- Excellent elongation supports forming processes
- Strong fatigue resistance for repeated pressure cycles
High Strength Hot Rolled HP345 Gas Cylinder Steel Applications
Gas Cylinder Manufacturing
- LPG cylinders
- CNG cylinders
- Industrial gas storage tanks
Gas cylinder manufacturing – "Cylinder forming and welding process"
Pressure Equipment
- High-pressure vessels
- Transportable gas containers
- Energy and petrochemical storage systems
HP345 is especially suitable for applications requiring higher strength and lighter cylinder design.
High Strength Hot Rolled HP345 Gas Cylinder Steel Processing Advantages
Forming Performance
- Suitable for deep drawing and spinning
- Consistent thickness ensures uniform shaping
- Reduced risk of cracking during forming
Welding Performance
- Stable weldability with low defect rates
- Compatible with automated welding systems
- High joint strength after welding
Production Efficiency
- Lower material consumption due to high strength
- Improved yield rates in cylinder production
- Reduced manufacturing costs over time
High Strength Hot Rolled HP345 Gas Cylinder Steel Specifications
| Item | Details |
|---|---|
| Thickness | 2.5 – 14 mm |
| Width | 1000 – 2500 mm |
| Length | As required |
| Form | Plates / Coils |
| Surface | Hot rolled / Pickled / Oiled |
| Delivery State | Controlled rolling / Normalized |
Shipment & packaging – "HP345 steel ready for export"
Why Choose GNEE for High Strength Hot Rolled HP345 Gas Cylinder Steel?
Advanced Manufacturing
- Modern rolling mills and heat treatment facilities
- Large-scale production capacity
Strict Quality Control
- Mill Test Certificates (MTC) provided
- Third-party inspections available
Customization Capability
- Flexible sizes and specifications
- Tailored solutions for different markets
Global Export Experience
- Serving clients across Asia, Middle East, Africa, and Europe
- Strong logistics and on-time delivery
Conclusion: High Strength Hot Rolled HP345 Gas Cylinder Steel Supplier
Choosing High Strength Hot Rolled HP345 Gas Cylinder Steel ensures higher safety margins, improved durability, and better performance in high-pressure gas storage applications.
👉 Looking for a trusted HP345 steel supplier? Contact GNEE today for expert support, factory-direct pricing, and fast delivery-send your inquiry now and get a customized quotation!
FAQ
Is HP345 gas cylinder steel suitable for deep drawing and spinning processes?
Yes, HP345 gas cylinder steel is optimized for deep drawing and spinning, ensuring excellent formability and reducing the risk of cracking during cylinder manufacturing.
Will HP345 gas cylinder steel crack during forming?
GNEE-controlled HP345 gas cylinder steel minimizes cracking risks through refined grain structure and controlled composition, especially in critical areas like cylinder shoulders.
How does HP345 gas cylinder steel reduce production scrap rates?
With stable mechanical properties and superior formability, HP345 gas cylinder steel significantly improves yield rates and reduces material waste.
Does HP345 gas cylinder steel require special processing parameters?
HP345 gas cylinder steel can be processed using standard forming techniques, and GNEE also provides technical guidance to optimize your production process.
What surface quality can be expected from HP345 gas cylinder steel?
HP345 gas cylinder steel from GNEE offers smooth, defect-free surfaces suitable for coating, painting, and galvanizing without additional processing.
Are there internal defects in HP345 gas cylinder steel?
GNEE ensures HP345 gas cylinder steel is free from internal defects such as inclusions and cracks through advanced inspection methods like ultrasonic testing.
Is HP345 gas cylinder steel easy to weld?
Yes, HP345 gas cylinder steel has good weldability, and GNEE can provide welding recommendations to ensure strong and reliable joints.
How does HP345 gas cylinder steel perform under extreme conditions?
HP345 gas cylinder steel maintains excellent toughness and strength under high pressure and varying temperatures, ensuring safe operation.
Can HP345 gas cylinder steel improve production efficiency?
Yes, due to its consistent quality and excellent formability, HP345 gas cylinder steel reduces downtime and improves manufacturing efficiency.
What technical support does GNEE provide for HP345 gas cylinder steel?
GNEE offers full technical support, including forming, welding, and material selection guidance, helping customers maximize the value of HP345 gas cylinder steel.
