Products Description
HP295 is one of the core grades in the GB 6653 standard "Steel Plates and Strips for Welded Gas Cylinders". Its naming rules are clear and straightforward:
HP: Derived from the first letters of the Chinese pinyin for "welding" and "cylinder," representing "for welding gas cylinders".
295: Represents the minimum yield strength of this material as 295 MPa.
s a leading professional steel manufacturer, GNEE provides high-grade HP295 steel plates and coils that strictly adhere to the JIS G3116 standard. With decades of manufacturing experience and a robust supply chain, GNEE ensures that your LPG cylinder production meets the highest international safety benchmarks, providing peace of mind to millions of househol
Chemical Composition and Performance Basis
Chemical Composition
The chemical composition of HP295 welding cylinder steel is scientifically designed and rationally formulated. The main elements include carbon (C), silicon (Si), manganese (Mn), phosphorus (P), sulfur (S), and aluminum (Als).
The carbon content is generally controlled between 0.13% and 0.18%. A lower carbon content helps reduce carbide precipitation during welding, lowers the hardness of the weld heat-affected zone, and improves the toughness of the weld joint. The silicon content typically does not exceed 0.07% to avoid the adverse effects of silicon oxides on the steel's properties.
Manganese, as a solid solution strengthening element, is present between 0.70% and 1.00%, which improves both the steel's strength and grain refinement, thus enhancing its toughness.
The phosphorus and sulfur contents are strictly controlled at low levels (P≤0.020%, S≤0.010%) to reduce inclusions in the steel, improve its purity, and enhance its weldability. Aluminum, as a deoxidizer, with a content between 0.020% and 0.050%, can effectively remove oxygen from steel, refine grains, and improve the impact toughness of steel.
|
C |
Si |
Mn |
P |
S |
Als |
|
0.18 |
0.10 |
1.00 |
0.025 |
0.015 |
≥0.015 |
Welding Performance
Welding Process Adaptability
HP295 weldable cylinder steel exhibits excellent welding process adaptability, suitable for various welding processes including submerged arc welding, plasma welding, and gas shielded welding. Its low carbon equivalent reduces the tendency for welding cracks, resulting in a gradual increase in hardness in the heat-affected zone and a significantly lower risk of cold cracking. This allows HP295 weldable cylinder steel to maintain good weld quality and reduce post-weld repair costs.
Welded Joint Performance
The welded joints of HP295 weldable cylinder steel possess high strength and good toughness. Through reasonable control of welding process parameters, the yield strength and tensile strength of the welded joint can be ensured to meet design requirements, while maintaining a low yield-to-tensile strength ratio (generally controlled between 0.65 and 0.75), which is beneficial for improving the welded structure's resistance to brittle fracture.
Furthermore, the welded joint also exhibits good impact toughness, maintaining a high level of toughness even at low temperatures, meeting the safety requirements of gas cylinders under different operating conditions.
Welding Defect Control
During the welding process of HP295 welded cylinder steel, the generation of welding defects can be effectively controlled by optimizing welding process parameters, controlling the quality of welding materials, and strengthening welding process monitoring.
Welding performance of HP295 gas cylinder steel
Forming Characteristics
Cold Stamping Formability
HP295 welded cylinder steel exhibits excellent cold stamping formability, meeting the complex stamping requirements of gas cylinder manufacturing. Its moderate yield strength, good plasticity, and low yield strength ratio prevent cracking and deformation during stamping. Furthermore, HP295 welded cylinder steel has minimal longitudinal and transverse performance differences, ensuring excellent cold stamping performance and guaranteeing dimensional accuracy and surface quality during stamping.
Bending Performance
HP295 welded cylinder steel possesses excellent bending performance, meeting the requirements of a 180° cold bending test (bending head diameter D = 2.0a, where a is the plate thickness). This characteristic allows HP295 welded cylinder steel to easily handle various bending forming requirements during gas cylinder manufacturing, such as the stamping of cylinder heads. Good bending performance also contributes to improving the overall strength and sealing performance of the gas cylinder.
Forming Stability
HP295 welded cylinder steel exhibits high stability during the forming process. By optimizing rolling process parameters, controlling the thickness variation of steel plates, and strengthening the control of steel plate flatness, the HP295 welded cylinder steel can maintain stable performance during the forming process. This helps reduce the scrap rate during forming, improve production efficiency, and lower production costs.
HP295 welded gas cylinder steel and its forming characteristics
Why GNEE is Your Trusted HP295 Steel Manufacturer
Choosing the right supplier is just as important as choosing the right steel grade. At GNEE, we don't just sell steel; we provide comprehensive material solutions. Our HP295 Weldable Gas Cylinder Steel is produced using state-of-the-art technology to ensure that every millimeter of the plate meets your exact requirements.
Quality Control and Certification
We implement a multi-stage quality control process. From the initial smelting to the final rolling and cutting, our laboratory conducts ultrasonic testing, tensile tests, and chemical analysis. We provide MTC (Mill Test Certificates) with every order, ensuring full traceability and compliance with international standards.
Global Logistics and Packaging
We understand that timing is critical in manufacturing. Our logistics team ensures that your HP295 steel is packaged securely using moisture-proof materials and steel strapping to prevent damage during sea or land transit. Whether you need a single container or a bulk shipment, GNEE guarantees timely delivery.
GNEE's factory
Contact now to get the request free sample & technical support
What is HP295 gas cylinder steel used for in cylinder manufacturing?
HP295 gas cylinder steel is mainly used for LPG cylinders, industrial gas cylinders, and pressure vessels due to its high strength and ductility.
What is the yield strength of HP295 gas cylinder steel?
The yield strength of HP295 gas cylinder steel is ≥295 MPa, ensuring safe pressure resistance.
Is HP295 gas cylinder steel suitable for deep drawing applications?
Yes, HP295 gas cylinder steel offers excellent deep drawing performance with low cracking risk.
How stable are HP295 gas cylinder steel mechanical properties across batches?
GNEE ensures stable HP295 gas cylinder steel performance through strict process control and batch management.
Can HP295 gas cylinder steel be used for spinning and neck forming?
Yes, HP295 gas cylinder steel performs well in spinning processes with consistent deformation.
What is the elongation of HP295 gas cylinder steel?
HP295 gas cylinder steel typically has elongation ≥26%, ensuring good ductility.
How is the weldability of HP295 gas cylinder steel?
HP295 gas cylinder steel has excellent weldability for cylinder body fabrication.
What surface condition is available for HP295 gas cylinder steel?
HP295 gas cylinder steel can be supplied in hot rolled, pickled, or customized surface conditions.
