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The GB/T 31928 standard specifies the requirements for seamless stainless steel tubes and pipes used in shipbuilding applications. These tubes and pipes are designed to withstand the demanding conditions found in marine environments, providing superior corrosion resistance, strength, and durability. This article highlights the material, specifications, key features, chemical composition, mechanical properties, steel grades, applications, and possible alternative grades of GB/T 31928 stainless steel tubes.
GB/T 31928 stainless steel tubes are manufactured using high-quality stainless steel materials. These tubes are available in a variety of grades and sizes to meet specific requirements. The standard specifies the following key specifications for seamless stainless steel tubes and pipes for ships:
Seamless stainless steel tubes and pipes conforming to GB/T 31928 offer several key features, making them ideal for shipbuilding applications. These include:
Superior Corrosion Resistance: Stainless steel is known for its excellent resistance to corrosion. These tubes provide a high level of protection against corrosion caused by saltwater, chemicals, and various atmospheric conditions encountered in marine environments.
High Strength: GB/T 31928 stainless steel tubes possess excellent mechanical properties, including high strength and toughness. These tubes can withstand harsh operational conditions and offer structural integrity under heavy loads and harsh sea conditions.
Durability: Designed to withstand the challenges of maritime environments, these stainless steel tubes exhibit enhanced durability and longevity. They can withstand extreme temperatures, pressure, and exposure to harsh chemicals, ensuring a prolonged service life.
Low Maintenance: Stainless steel tubes for ships require minimal maintenance due to their corrosion resistance and durability. This reduces the need for frequent repairs or replacements, resulting in cost savings for shipowners.
| Element | Grade 304 (%) | Grade 316L (%) | Grade 321 (%) |
|---|---|---|---|
| Carbon (C) | ≤0.08 | ≤0.030 | ≤0.12 |
| Silicon (Si) | ≤1.00 | ≤1.00 | ≤1.00 |
| Manganese (Mn) | ≤2.00 | ≤2.00 | ≤2.00 |
| Phosphorus (P) | ≤0.045 | ≤0.045 | ≤0.040 |
| Sulfur (S) | ≤0.030 | ≤0.030 | ≤0.030 |
| Nickel (Ni) | 8.0-11.0 | 10.0-14.0 | 9.0-13.0 |
| Chromium (Cr) | 18.0-20.0 | 16.0-18.0 | 17.0-19.0 |
| Molybdenum (Mo) | - | 2.0-3.0 | - |
| Titanium (Ti) | - | - | 5*(C+N)-0.70 |
| Property | Grade 304 | Grade 316L | Grade 321 |
|---|---|---|---|
| Tensile Strength (MPa) | ≥520 | ≥485 | ≥520 |
| Yield Strength (MPa) | ≥205 | ≥170 | ≥205 |
| Elongation (%) | ≥35 | ≥35 | ≥40 |
| Hardness (HB) | ≤187 | ≤187 | ≤187 |
| Impact Test (J) | ≥27 | ≥27 | ≥27 |
The GB/T 31928 standard encompasses various steel grades suitable for seamless stainless steel tubes and pipes. Some of the commonly used steel grades include:
GB/T 31928 stainless steel tubes are primarily used in shipbuilding applications where superior corrosion resistance and high strength are essential. These tubes find applications in various areas of ships, including:
Piping Systems: Seamless stainless steel tubes are used in piping systems to transport fluids, such as water, fuel, and hydraulic fluids. Their corrosion resistance ensures the durability and reliability of ship systems.
Heat Exchangers: These tubes are widely employed in heat exchange systems to transfer and control temperature, ensuring optimal performance of critical machinery and equipment on board.
Structural Components: Stainless steel tubes and pipes are utilized in the construction of ship's superstructures, decks, and other structural components, providing strength and endurance against harsh marine conditions.
While GB/T 31928 stainless steel tubes offer excellent performance and meet shipbuilding requirements, alternative stainless steel grades may be considered based on specific needs. Some possible alternative grades include:
Ultimately, the selection of alternative stainless steel grades should be based on the intended application and the desired balance between corrosion resistance, mechanical properties, and cost considerations.
Haiyan Sanxin Steel Pipe Factory is a leading manufacturer of steel pipes in China. Located in a region with excellent geographical advantages, the factory is situated close to the Zhoushan Port and Ningbo Port.
Our factory covers an area of more than 25,000 square meters and has been in the steel pipe manufacturing business for 20 years. Over this period, we have accumulated a wealth of professional experience, which has helped us establish ourselves as a trusted name in the industry.
At our factory, we specialize in the production of various types of steel pipes, including stainless steel pipe, carbon steel pipe, copper pipe, steel pipe,seamless steel pipe and welded pipe. Our expertise in this field is evident from the 12 patents that we hold, which demonstrate our commitment to innovation and excellence.
A: manufacturer,also can do trading.
A: Generally speaking,it is 10-15 days if the goods are in stock,or it is 30-40 days if the goods are not in stock, it is according to quantity.
A: Yes, we could offer the sample for free charge but need pay the cost of freight.
A: Payment<=2000USD, 100% in advance. Payment>=2000USD, 30% T/T in advance ,balance before shippment.
If you have another question, pls feel free to contact with me.
