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BSW NA15 Thread Rod
QS Fastener: BSW NA15 Thread Rod
Name: BSW NA15 Thread Rod
Material: Incoloy 800
Standard: BSW, DIN, NF, ANSI
Size: 2 inch
Length: 640 mm
Product Grade: A
Hardness: 170-220 HB
Application: For Heat Exchangers and Piping Systems
Feature: High Temperature Corrosion Resistance
Material: Incoloy 800
Standard: BSW, DIN, NF, ANSI
Size: 2 inch
Length: 640 mm
Product Grade: A
Hardness: 170-220 HB
Application: For Heat Exchangers and Piping Systems
Feature: High Temperature Corrosion Resistance
Quantity
BSW NA15 Thread Rod is manufactured from Incoloy 800 material and complies with BSW, DIN, NF, and ANSI international standards. It is available in a size of 2 inches and a length of 640 mm, with a product grade of Class A and a hardness of 170-220 HB. This product offers exceptional high-temperature corrosion resistance and is specifically designed for heat exchangers and piping systems, ensuring stability and durability in harsh high-temperature environments. It is an indispensable high-performance fastener for industrial equipment.
BSW NA15 Thread Rod utilizes Incoloy 800, a nickel-iron-chromium-based high-temperature alloy renowned for its excellent high-temperature strength and long-term stability. Its unique chemical composition (nickel 30-35 wt%, chromium 19-23 wt%, and iron balance) and microstructure enable it to maintain superior mechanical properties even at high temperatures, making it particularly suitable for fasteners and other critical components in long-term high-temperature environments.
High-Temperature Strength Mechanisms
The high-temperature strength of BSW NA15 Thread Rod is primarily attributed to the following mechanisms:
1. Solid Solution Strengthening: The addition of nickel and chromium significantly enhances the solid solution strengthening effect of the iron matrix, improving the alloy's high-temperature strength.
The high-temperature strength of BSW NA15 Thread Rod is primarily attributed to the following mechanisms:
1. Solid Solution Strengthening: The addition of nickel and chromium significantly enhances the solid solution strengthening effect of the iron matrix, improving the alloy's high-temperature strength.
2. Grain Boundary Strengthening: At high temperatures, the grain boundaries in the alloy remain highly stable, effectively preventing grain boundary sliding and creep.
3. Oxide Layer Protection: The Cr₂O₃ oxide layer formed at high temperatures not only provides oxidation resistance but also enhances surface hardness and strength to some extent.
4. Phase Stability: Incoloy 800 maintains a stable austenitic structure at high temperatures, avoiding performance degradation caused by phase transformations.
High-Temperature Mechanical Properties Data
The mechanical properties (tensile strength, yield strength, and elongation) of BSW NA15 Thread Rod at different temperatures are shown in the table below:
The mechanical properties (tensile strength, yield strength, and elongation) of BSW NA15 Thread Rod at different temperatures are shown in the table below:
| Temperature (°C) | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Remarks |
| 20 | 550 | 220 | 40 | Excellent mechanical properties at room temperature |
| 600 | 500 | 200 | 35 | High strength retention at high temperatures |
| 800 | 450 | 180 | 30 | Stable under long-term high-temperature exposure |
Analysis of High-Temperature Strength Characteristics
1. Tensile Strength:
At room temperature (20°C), the tensile strength of BSW NA15 Thread Rod is 550 MPa, demonstrating excellent initial strength.
As the temperature increases, the tensile strength gradually decreases, but it remains at 450 MPa at 800°C, indicating its high load-bearing capacity at elevated temperatures.
1. Tensile Strength:
At room temperature (20°C), the tensile strength of BSW NA15 Thread Rod is 550 MPa, demonstrating excellent initial strength.
As the temperature increases, the tensile strength gradually decreases, but it remains at 450 MPa at 800°C, indicating its high load-bearing capacity at elevated temperatures.
2. Yield Strength:
The yield strength at room temperature is 220 MPa, indicating that the alloy is resistant to plastic deformation under low stress.
At 800°C, the yield strength decreases to 180 MPa, still meeting the requirements of most high-temperature applications.
The yield strength at room temperature is 220 MPa, indicating that the alloy is resistant to plastic deformation under low stress.
At 800°C, the yield strength decreases to 180 MPa, still meeting the requirements of most high-temperature applications.
3. Elongation:
The elongation at room temperature is 40%, indicating good plasticity and toughness.
At high temperatures, the elongation slightly decreases but remains at 30% at 800°C, demonstrating the alloy's good deformation capability under high temperatures.
The elongation at room temperature is 40%, indicating good plasticity and toughness.
At high temperatures, the elongation slightly decreases but remains at 30% at 800°C, demonstrating the alloy's good deformation capability under high temperatures.
High-Temperature Strength Comparison
Compared to other commonly used high-temperature alloys, BSW NA15 Thread Rod exhibits superior high-temperature strength. Below is a comparison of the mechanical properties of several alloys at 800°C:
Compared to other commonly used high-temperature alloys, BSW NA15 Thread Rod exhibits superior high-temperature strength. Below is a comparison of the mechanical properties of several alloys at 800°C:
| Alloy Material | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Remarks |
| Incoloy 800 | 450 | 180 | 30 | Excellent high-temperature strength |
| 304 Stainless Steel | 300 | 120 | 25 | Moderate high-temperature strength |
| Inconel 600 | 500 | 200 | 35 | Exceptional high-temperature strength |
| Carbon Steel | <100 | <50 | <10 | Poor high-temperature strength |
Factors Affecting High-Temperature Strength
The high-temperature strength of BSW NA15 Thread Rod is influenced by the following factors:
1. Temperature: Higher temperatures gradually reduce the material's strength, but BSW NA15 Thread Rod maintains high strength up to 800°C.
The high-temperature strength of BSW NA15 Thread Rod is influenced by the following factors:
1. Temperature: Higher temperatures gradually reduce the material's strength, but BSW NA15 Thread Rod maintains high strength up to 800°C.
2. Time: Under long-term high-temperature exposure, the material may experience creep and grain boundary weakening, but the high stability of **Incoloy 800** effectively delays these phenomena.
3. Stress Level: In high-stress environments, the risk of deformation and failure increases, but the high yield strength of BSW NA15 Thread Rod effectively resists plastic deformation.
4. Microstructure: The grain size, phase composition, and precipitate distribution of the alloy significantly impact its high-temperature strength.
BSW NA15 Thread Rod, with its excellent solid solution strengthening, grain boundary stability, and oxide layer protection, demonstrates outstanding mechanical properties at high temperatures. Its tensile strength, yield strength, and elongation remain high even at elevated temperatures, making it an ideal material for industries such as chemical, power, nuclear, and aerospace. Through optimized heat treatment and alloy composition, the high-temperature strength of BSW NA15 Thread Rod can be further enhanced to meet more demanding high-temperature requirements.
BSW NA15 Thread Rod is specifically designed for heat exchangers and piping systems, ensuring stability and durability in harsh high-temperature environments. It is an indispensable high-performance fastener for industrial equipment. Whether in chemical plants, nuclear facilities, or oil and gas pipelines, BSW NA15 Thread Rod provides reliable fastening performance, making it the ideal choice for high-temperature and high-pressure environments.
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