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DIN W.Nr.1.4876 Fastener
QS Fastener: DIN W.Nr.1.4876 Fastener
Name: DIN W.Nr.1.4876 Fastener
Material: Z8NC32.21
Standard: DIN, NF, ANSI, BSW
Size: 5/8 inch
Length: 115 mm
Product Grade: A
Hardness: 170 to 220 HB
Application: For Heat Exchangers and Piping Systems
Feature: High Temperature Corrosion Resistance
Material: Z8NC32.21
Standard: DIN, NF, ANSI, BSW
Size: 5/8 inch
Length: 115 mm
Product Grade: A
Hardness: 170 to 220 HB
Application: For Heat Exchangers and Piping Systems
Feature: High Temperature Corrosion Resistance
Quantity
DIN W.Nr.1.4876 Fastener is manufactured from Z8NC32.21 material and complies with DIN, NF, ANSI, and BSW international standards. It is available in a size of 5/8 inches and a length of 115 mm, with a product grade of Class A and a hardness of 170-220 HB. This product offers outstanding high-temperature corrosion resistance and is specifically designed for heat exchangers and piping systems, ensuring reliability and durability in high-temperature and corrosive environments. It is an ideal choice for high-performance fasteners in industrial applications.
DIN W.Nr.1.4876 Fastener utilizes Incoloy 800, a nickel-iron-chromium-based high-temperature alloy. Its excellent corrosion resistance is primarily attributed to its high chromium content (19-23 wt%) and nickel content (30-35 wt%). These elements form a stable oxide layer (such as Cr₂O₃) on the alloy surface, effectively resisting the attack of various corrosive media. Below is an analysis of the performance of DIN W.Nr.1.4876 Fastener in different corrosive environments and its corrosion resistance mechanisms.
Corrosion Resistance Mechanisms
The corrosion resistance of DIN W.Nr.1.4876 Fastener primarily relies on the following mechanisms:
1. Oxide Layer Protection: In oxidizing environments, chromium reacts with oxygen to form a dense Cr₂O₃ oxide layer, preventing further corrosion of the base material.
The corrosion resistance of DIN W.Nr.1.4876 Fastener primarily relies on the following mechanisms:
1. Oxide Layer Protection: In oxidizing environments, chromium reacts with oxygen to form a dense Cr₂O₃ oxide layer, preventing further corrosion of the base material.
2. Passivation Effect: In acidic or alkaline environments, a stable passive film forms on the alloy surface, significantly reducing the corrosion rate.
3. Nickel Stability: The addition of nickel enhances the alloy's resistance to reducing acids and chlorides, especially at high temperatures.
4. Microstructural Stability: The austenitic structure of Incoloy 800 remains stable in high-temperature and corrosive environments, avoiding localized corrosion caused by phase transformations.
Corrosion Resistance Performance Analysis
1. Oxidizing Acids (e.g., Nitric Acid, Sulfuric Acid):
In nitric acid, DIN W.Nr.1.4876 Fastener exhibits an extremely low corrosion rate (<0.01 mm/year), indicating excellent corrosion resistance.
1. Oxidizing Acids (e.g., Nitric Acid, Sulfuric Acid):
In nitric acid, DIN W.Nr.1.4876 Fastener exhibits an extremely low corrosion rate (<0.01 mm/year), indicating excellent corrosion resistance.
In sulfuric acid, the corrosion rate slightly increases (0.05 mm/year) but remains within an acceptable range, demonstrating good corrosion resistance.
2. Reducing Acids (e.g., Hydrochloric Acid, Hydrofluoric Acid):
In hydrochloric acid, the corrosion rate is higher (0.5 mm/year), indicating limited corrosion resistance, though it still outperforms standard stainless steel.
In hydrochloric acid, the corrosion rate is higher (0.5 mm/year), indicating limited corrosion resistance, though it still outperforms standard stainless steel.
In hydrofluoric acid, the corrosion rate further increases (1.0 mm/year), indicating poor corrosion resistance, and its use should be carefully considered.
3. Alkaline Media (e.g., Sodium Hydroxide):
In sodium hydroxide, DIN W.Nr.1.4876 Fastener exhibits an extremely low corrosion rate (<0.01 mm/year), indicating excellent corrosion resistance.
In sodium hydroxide, DIN W.Nr.1.4876 Fastener exhibits an extremely low corrosion rate (<0.01 mm/year), indicating excellent corrosion resistance.
4. High-Temperature Sulfide and Chloride Environments:
In high-temperature hydrogen sulfide environments, the corrosion rate is extremely low (0.02 mm/year), indicating excellent resistance to sulfide corrosion.
In high-temperature hydrogen sulfide environments, the corrosion rate is extremely low (0.02 mm/year), indicating excellent resistance to sulfide corrosion.
In sodium chloride solutions, the corrosion rate is extremely low (0.01 mm/year), demonstrating excellent resistance to pitting and crevice corrosion.
Corrosion Resistance Comparison
Compared to other commonly used alloys, DIN W.Nr.1.4876 Fastener exhibits superior corrosion resistance in various corrosive media. Below is a comparison of the corrosion rates of several alloys in 10% sulfuric acid and 10% hydrochloric acid:
Compared to other commonly used alloys, DIN W.Nr.1.4876 Fastener exhibits superior corrosion resistance in various corrosive media. Below is a comparison of the corrosion rates of several alloys in 10% sulfuric acid and 10% hydrochloric acid:
| Alloy Material | 10% Sulfuric Acid (mm/year) | 10% Hydrochloric Acid (mm/year) | Remarks |
| Incoloy 800 | 0.05 | 0.5 | Excellent corrosion resistance |
| 304 Stainless Steel | 0.5 | 5.0 | Moderate corrosion resistance |
| Inconel 600 | 0.02 | 0.3 | Exceptional corrosion resistance |
| Carbon Steel | >10 | >10 | Poor corrosion resistance |
Conclusion
DIN W.Nr.1.4876 Fastener, with its high chromium and nickel content, demonstrates excellent corrosion resistance in various corrosive media. Its performance in oxidizing acids, alkaline media, and high-temperature sulfide environments is particularly outstanding, making it an ideal material for industries such as chemical, petroleum, nuclear, and marine engineering. Through optimized surface treatment, alloy composition, and heat treatment processes, the corrosion resistance of DIN W.Nr.1.4876 Fastener can be further enhanced to meet more demanding industrial requirements.
DIN W.Nr.1.4876 Fastener, with its high chromium and nickel content, demonstrates excellent corrosion resistance in various corrosive media. Its performance in oxidizing acids, alkaline media, and high-temperature sulfide environments is particularly outstanding, making it an ideal material for industries such as chemical, petroleum, nuclear, and marine engineering. Through optimized surface treatment, alloy composition, and heat treatment processes, the corrosion resistance of DIN W.Nr.1.4876 Fastener can be further enhanced to meet more demanding industrial requirements.
DIN W.Nr.1.4876 Fastener is specifically designed for heat exchangers and piping systems, ensuring reliability and durability in high-temperature and corrosive environments. It is an ideal choice for high-performance fasteners in industrial applications. Whether in chemical plants, nuclear facilities, or oil and gas pipelines, DIN W.Nr.1.4876 Fastener provides reliable fastening performance, making it the ideal choice for high-temperature, high-pressure, and corrosive environments.
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