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Duplex Stainless Steel 2205 Stud bolt
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Name: Duplex Stainless Steel 2205 Stud bolt
Material: Duplex Stainless Steel 2205
Standard: UNS S32205
Size: M30
Hardness: 290 HB
Length: 280 mm
Application: For Petroleum chemical industry and marine engineering
Feature: High strength: The yield strength is approximately twice that of ordinary 304 or 316 austenitic stainless steel.
Material: Duplex Stainless Steel 2205
Standard: UNS S32205
Size: M30
Hardness: 290 HB
Length: 280 mm
Application: For Petroleum chemical industry and marine engineering
Feature: High strength: The yield strength is approximately twice that of ordinary 304 or 316 austenitic stainless steel.
Quantity
This stud bolt is manufactured from high-quality Duplex Stainless Steel 2205 (UNS S32205), with a specification of M30 and a length of 280mm. It achieves a hardness of 290 HB, offering exceptional mechanical properties. Compared to ordinary 304 or 316 austenitic stainless steels, its yield strength is approximately twice as high. Additionally, it provides excellent resistance to pitting, crevice corrosion, and stress corrosion cracking. This product is specifically designed for demanding environments such as the petrochemical industry and marine engineering, making it an ideal choice for high-strength connections and long-term reliability.
What is Duplex Stainless Steel 2205?
2205 is a type of duplex stainless steel that combines the advantages of both austenitic and ferritic stainless steels. It is renowned for its high strength and excellent corrosion resistance, particularly in environments containing chloride ions, making it one of the most commonly used duplex steel grades on the market.
2205 is a type of duplex stainless steel that combines the advantages of both austenitic and ferritic stainless steels. It is renowned for its high strength and excellent corrosion resistance, particularly in environments containing chloride ions, making it one of the most commonly used duplex steel grades on the market.
What is the difference between 904L and Duplex 2205?
904L and Duplex 2205 are two types of stainless steel with excellent performance, exhibiting significant differences in microstructure, mechanical properties, corrosion resistance characteristics, and cost. Simply put, 2205 is a duplex stainless steel known for its high strength and is often used in the manufacture of high-strength fasteners such as the Duplex Stainless Steel 2205 Stud Bolt; whereas 904L is a super-austenitic stainless steel, renowned for its exceptional corrosion resistance in reducing acid environments.
904L and Duplex 2205 are two types of stainless steel with excellent performance, exhibiting significant differences in microstructure, mechanical properties, corrosion resistance characteristics, and cost. Simply put, 2205 is a duplex stainless steel known for its high strength and is often used in the manufacture of high-strength fasteners such as the Duplex Stainless Steel 2205 Stud Bolt; whereas 904L is a super-austenitic stainless steel, renowned for its exceptional corrosion resistance in reducing acid environments.
1. Microstructure and Basic Characteristics
This is the most fundamental difference between the two.
2205 Duplex Stainless Steel: Its microstructure consists of approximately 50% ferrite and 50% austenite. This duplex structure gives it the advantages of both phases, enabling it to meet the stringent requirements for high load-bearing capacity demanded by the Duplex Stainless Steel 2205 Stud Bolt. It is magnetic.
904L Super-Austenitic Stainless Steel: This is a fully austenitic stainless steel, with a microstructure similar to common grades like 304 and 316L, but with a higher alloy content. It is non-magnetic.
This is the most fundamental difference between the two.
2205 Duplex Stainless Steel: Its microstructure consists of approximately 50% ferrite and 50% austenite. This duplex structure gives it the advantages of both phases, enabling it to meet the stringent requirements for high load-bearing capacity demanded by the Duplex Stainless Steel 2205 Stud Bolt. It is magnetic.
904L Super-Austenitic Stainless Steel: This is a fully austenitic stainless steel, with a microstructure similar to common grades like 304 and 316L, but with a higher alloy content. It is non-magnetic.
2. Chemical Composition Comparison
The differences in chemical composition determine the distinct performance characteristics of the two materials. 2205 relies on chromium, molybdenum, and nitrogen to achieve high strength and high corrosion resistance, making it an ideal base material for the Duplex Stainless Steel 2205 Stud Bolt. In contrast, 904L tackles aggressive acid environments through the addition of substantial amounts of nickel, molybdenum, and copper.
The differences in chemical composition determine the distinct performance characteristics of the two materials. 2205 relies on chromium, molybdenum, and nitrogen to achieve high strength and high corrosion resistance, making it an ideal base material for the Duplex Stainless Steel 2205 Stud Bolt. In contrast, 904L tackles aggressive acid environments through the addition of substantial amounts of nickel, molybdenum, and copper.
| Element (wt. %) | 2205 | 904L |
| Cr | 21.0 - 23.0 | 19.0 - 23.0 |
| Ni | 4.5 - 6.5 | 23.0 - 28.0 |
| Mo | 2.5 - 3.5 | 4.0 - 5.0 |
| Cu | —— | 1.0 - 2.0 |
| N | 0.14 - 0.20 | ≤0.10 |
| C | ≤0.03 | ≤0.02 |
As shown in the table above, 904L has a significantly higher nickel content than 2205 and also contains copper, which is key to its resistance to sulfuric acid corrosion. With its optimized alloy composition, 2205 provides an excellent foundation of strength for the Duplex Stainless Steel 2205 Stud Bolt while ensuring outstanding corrosion resistance.
3. Mechanical Properties Comparison
In terms of strength, 2205 has a clear advantage.
Strength: The yield strength of 2205 is approximately twice that of 904L. This makes 2205 highly suitable for equipment and structural components that need to withstand high pressure. For instance, when manufacturing the Duplex Stainless Steel 2205 Stud Bolt, it enables lightweight design and ensures connection safety.
904L: Its strength is relatively lower. However, due to its austenitic structure, its elongation and toughness are generally superior to those of 2205, especially in low-temperature environments.
In terms of strength, 2205 has a clear advantage.
Strength: The yield strength of 2205 is approximately twice that of 904L. This makes 2205 highly suitable for equipment and structural components that need to withstand high pressure. For instance, when manufacturing the Duplex Stainless Steel 2205 Stud Bolt, it enables lightweight design and ensures connection safety.
904L: Its strength is relatively lower. However, due to its austenitic structure, its elongation and toughness are generally superior to those of 2205, especially in low-temperature environments.
4. Corrosion Resistance Comparison
Both materials resist various forms of corrosion, but each excels in its own specific areas.
Pitting Resistance: This is typically evaluated using the Pitting Resistance Equivalent Number (PREN). The PREN value for 2205 is approximately 35, while for 904L it is around 34-36. Both materials have comparable resistance to pitting corrosion caused by chloride ions, ensuring the reliability of the Duplex Stainless Steel 2205 Stud Bolt in high-chloride environments like marine applications. Some studies indicate that under certain high-temperature and high-pressure conditions, 904L's pitting resistance may even surpass that of 2205.
Both materials resist various forms of corrosion, but each excels in its own specific areas.
Pitting Resistance: This is typically evaluated using the Pitting Resistance Equivalent Number (PREN). The PREN value for 2205 is approximately 35, while for 904L it is around 34-36. Both materials have comparable resistance to pitting corrosion caused by chloride ions, ensuring the reliability of the Duplex Stainless Steel 2205 Stud Bolt in high-chloride environments like marine applications. Some studies indicate that under certain high-temperature and high-pressure conditions, 904L's pitting resistance may even surpass that of 2205.
Resistance to Stress Corrosion Cracking (SCC): This is one of the biggest advantages of 2205. Its duplex structure makes it highly resistant to stress corrosion cracking in chloride-containing environments, far exceeding that of common austenitic stainless steels like 304 and 316L, and also offering advantages over the high-nickel 904L. This characteristic is crucial for the long-term, stable service of the Duplex Stainless Steel 2205 Stud Bolt under demanding working conditions.
Resistance to Reducing Acid Corrosion: Due to the addition of copper, 904L exhibits excellent performance in reducing media such as sulfuric acid and phosphoric acid, making it particularly suitable for handling low to medium concentrations of sulfuric acid. 2205 performs slightly less effectively in this regard.
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Website:www.qishine.com
Email: qishine@qishine.com
Tel: 0592-5225595
WhatsApp: +86 15960259563
+86 15985833169
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