304/316L Seamless Steel Pipe

304/316L seamless steel pipes are two common types of stainless - steel pipes, each with the following characteristics:

304 Seamless Steel Pipe:

Good Corrosion Resistance: 304 seamless steel pipes have relatively good tolerance to weakly corrosive media such as air, steam, water and chemically corrosive media such as acids, alkalis and salts. This is due to the chromium element contained in the steel. When the chromium content in the steel reaches about 12%, chromium reacts with oxygen in the corrosive medium to form a very thin oxide film (self - passivation film) on the steel surface, which can prevent the base of the steel from further corrosion. It is applicable to daily environments and many industrial application scenarios, such as the conveying pipes or mechanical structural components in food processing, chemical, medical, light - industrial, mechanical - instrument and other industries.

Excellent Machinability: It has good plasticity, weldability and cold - working performance, and is convenient for processing operations such as cutting, bending and welding, and can meet the needs of various complex shapes and structures. For example, it is widely used in the manufacture of mechanical parts, engineering structural members and some conventional weapons (such as gun barrels, shells, etc.).

Good Mechanical Properties: It has a relatively high tensile strength, a certain degree of strength and hardness, and can bear a certain load and stress. Its tensile strength is generally ≥520MPa, yield strength ≥205MPa, elongation ≥40% and reduction of area ≥60%.

Hygienic and Environment - friendly: The material is non - toxic, odorless, has a smooth surface and is not prone to bacteria growth, meeting the high - hygiene requirements of applications in the food and medical industries.

High Cost - performance: Among stainless - steel pipes, the price of 304 seamless steel pipes is relatively economical and has a high cost - performance ratio. Therefore, it is widely used in many fields where the requirements for corrosion resistance are not extremely stringent.

316L Seamless Steel Pipe:

Outstanding Corrosion Resistance:

Strong Resistance to Chloride Corrosion: In a neutral medium containing chloride ions, the corrosion resistance of 316L is significantly better than that of 304. It can effectively resist the local corrosion caused by chloride ions. Therefore, it performs excellently in environments with a high chloride content such as seawater treatment and marine engineering, and is often used in offshore oil platforms, submarine pipelines and other facilities.

Resistance to Acid - base Corrosion: It also has good resistance to corrosion in acidic and alkaline environments and can be applied to chemical equipment, pharmaceutical equipment and other fields. It can work stably for a long time in corrosive media such as sulfuric acid and acetic acid.

Good Mechanical Properties:

High Strength: It has a relatively high tensile strength, generally ≥620MPa, and yield strength ≥310MPa. It can bear a large load and stress and is suitable for occasions with high requirements for mechanical strength.

Good Toughness: It has good toughness. When subjected to impact or vibration, it can absorb energy, reduce the risk of fracture and improve the safety and reliability of the pipeline system.

Good Machining and Welding Properties: Like 304, 316L seamless steel pipes also have good machining performance and are convenient for various machining operations. At the same time, it has excellent welding performance. The welded joints have high strength and good sealing performance and can meet the installation and connection requirements of various complex pipeline systems.