HP295 welded gas cylinders steel plate is a high-performance pressure vessel steel grade under GB/T 6653, specifically engineered for the safe and efficient production of LPG gas cylinders.
HP295 welded gas cylinders steel plate
As a professional steel supplier, Gnee Steel provides stable-quality HP295 plates and coils with reliable delivery and strict quality control to support global cylinder manufacturers.
With a minimum yield strength of 295 MPa, excellent plasticity, and controlled chemical composition, HP295 ensures superior forming performance, weldability, and safety in high-pressure gas storage applications.
Why Choose HP295 Steel Plate for Gas Cylinders?
In LPG cylinder manufacturing, buyers often face critical challenges such as:
- Risk of cracking during deep drawing or forming
- Inconsistent mechanical properties affecting safety compliance
- Poor weldability leading to leakage risks
- High rejection rates increasing production cost
HP295 steel plate effectively solves these issues by offering:
- Stable strength with excellent elongation → reduces forming defects
- Low impurity elements (P, S) → improves weld integrity
- Fine grain structure → enhances safety and durability
- Consistent quality → reduces scrap rate and total cost
Mechanical Properties of HP295 Steel Plate
| Property | Value |
|---|---|
| Yield Strength (MPa) | ≥ 295 |
| Tensile Strength (MPa) | 440 – 560 |
| Elongation (%) (t < 3mm) | ≥ 20 |
| Elongation (%) (t ≥ 3mm) | ≥ 26 |
Balanced strength and ductility make HP295 ideal for deep drawing and pressure resistance applications.
Chemical Composition of HP295 Steel
| Element | Content (%) |
|---|---|
| C | ≤ 0.18 |
| Si | ≤ 0.10 |
| Mn | ≤ 1.00 |
| P | ≤ 0.025 |
| S | ≤ 0.015 |
| Als | As required |
Low sulfur and phosphorus improve weldability and reduce the risk of brittle fracture in cylinder applications.
Available Sizes & Supply Capability of HP295 Steel
Thickness: 1.5 mm – 12 mm
Width: Customizable
Form: Steel plate & hot rolled coil
Monthly Supply: Up to 5000 tons
Coil Thickness Note: Typically supplied in thin gauge for forming processes
Manufacturing Process of HP295 Steel
HP295 steel is produced using advanced steelmaking routes:
Electric Arc Furnace (EAF)
Basic Oxygen Furnace (BOF)
These processes ensure:
Uniform internal structure
Clean steel with low inclusions
Stable mechanical performance
Inspection & Quality Assurance of HP295 Steel
To meet international safety standards for gas cylinders, HP295 plates undergo strict testing:
Explosion Test
Low Temperature Impact Test
Ultrasonic Examination (UT)
Normalizing Treatment
Third-Party Inspection (SGS, BV, etc.)
Result: Reliable performance in high-pressure LPG environments.
Main Applications of HP295 Steel Plate
HP295 welded gas cylinders steel plate is specifically engineered for pressure containment and forming-intensive applications. Thanks to its ≥295 MPa yield strength, 440–560 MPa tensile strength, and up to 26% elongation, it delivers an ideal balance between strength and ductility, making it highly suitable for the following industries:
LPG Gas Cylinders Manufacturing
HP295 is primarily used in the production of liquefied petroleum gas (LPG) cylinders, where safety and consistency are critical. During cylinder fabrication, steel plates must undergo deep drawing, spinning, and circumferential welding.
With elongation reaching ≥26% (for thickness ≥3 mm), HP295 significantly reduces:
- Cracking during deep drawing
- Edge tearing in forming processes
- Material thinning failures
At the same time, its controlled strength ensures that finished cylinders can withstand internal pressures typically ranging from 1.6 MPa to 2.5 MPa, meeting international safety requirements.
Welded Pressure Vessels
HP295 is also widely applied in low to medium pressure welded vessels, especially where forming and welding performance are equally important.
Compared with ordinary carbon steel:
- Lower impurity levels (P ≤ 0.025%, S ≤ 0.015%) improve weld seam integrity
- Fine grain structure enhances resistance to stress concentration
- Stable tensile range (440–560 MPa) ensures reliable load-bearing capacity
These properties help manufacturers reduce welding defects such as porosity, cracking, and lack of fusion, which are common pain points in pressure vessel fabrication.
Industrial Gas Storage Tanks
For industrial gas storage systems (oxygen, nitrogen, compressed air), HP295 offers a cost-effective and safe material solution.
Its advantages include:
- Ability to maintain structural stability under repeated pressure cycles
- Good low-temperature impact performance after normalization
- Compatibility with automated welding and mass production lines
In real production environments, using HP295 can reduce rejection rates by 10–15% compared to lower-grade materials, especially in high-volume tank manufacturing.
Propane and Butane Cylinders
HP295 is particularly suitable for propane and butane cylinders, where materials must endure:
- Frequent filling and transportation cycles
- External impact during handling
- Long-term exposure to varying environmental conditions
The combination of moderate strength and high ductility ensures that cylinders are not only resistant to internal pressure but also less prone to brittle fracture under sudden impact.
Additionally, its excellent weldability supports airtight seam welding, minimizing leakage risks-one of the biggest concerns for end users and regulators.
HP295 vs Other Gas Cylinder Steel Grades
Compared with lower grades such as HP235:
Higher strength → thinner material, lighter cylinders
Better ductility → fewer forming defects
Improved safety margin → meets stricter export standards
Why Choose Gnee Steel?
- Stable raw material supply with large monthly capacity
- Strict quality control aligned with GB/T 6653 standards
- Rich export experience for LPG cylinder manufacturers
- Flexible customization for size and specifications
- Fast delivery and professional technical support
Looking for a reliable supplier of HP295 welded gas cylinders steel plate? Send your inquiry now and get a customized quote within 24 hours!
Contact now to get HP295 steel plate: Quote
What is the chemical composition of HP295 steel?
The chemical composition of HP295 steel is strictly controlled, with carbon content not exceeding 0.20%, silicon ≤0.35%, manganese ≤1.20%, phosphorus ≤0.025%, and sulfur ≤0.015%. This balanced composition helps achieve a good combination of strength, weldability, and toughness.
Is HP295 steel suitable for welding?
Yes, HP295 steel has good weldability due to its relatively low carbon content and controlled impurity levels. It can be used with common welding methods such as manual arc welding, submerged arc welding, and gas shielded welding, while maintaining stable weld quality and reducing the risk of cracks.
What applications is HP295 steel used for?
HP295 steel is mainly used for manufacturing liquefied petroleum gas cylinders, industrial gas cylinders such as oxygen and nitrogen containers, as well as other medium to high-pressure gas storage vessels. Its higher strength makes it particularly suitable for applications with stricter safety requirements.
What thickness and size ranges are available for HP295 steel?
HP295 steel is typically available in thicknesses ranging from 1.5 mm to 20 mm, with widths from 1000 mm to 2500 mm, and lengths that can be customized according to production needs. For gas cylinder manufacturing, thinner specifications are more commonly used.
What are the advantages of HP295 steel compared to HP265?
Compared with HP265, HP295 steel provides higher yield strength and better pressure resistance, which increases the safety margin of gas cylinders. Although it may have slightly higher forming resistance, it remains suitable for standard manufacturing processes with proper control.
Hot Tags: hp295 welded gas cylinders steel plate, China hp295 welded gas cylinders steel plate manufacturers, suppliers, factory, S355JR Pressure Vessel Plate, pressure vessel steel plates, boiler grade plate, carbon steel vessels, stainless pressure vessel, Boiler Quality Steel Plates