ASTM B675 N08367 Stainless Steel Tube Iron Nickel Chromium Molybdenum Alloy Welded Pipe For General Purpose
Material
ASTM B675 N08367 is a high-performance stainless steel alloy that is primarily composed of iron, nickel, chromium, and molybdenum. This alloy is designed to provide excellent corrosion resistance and mechanical properties, making it suitable for a variety of applications in harsh environments.
Specification
The ASTM B675 specification covers the requirements for welded pipes made from N08367 alloy. These pipes are typically used in applications where resistance to corrosion and high temperatures is critical.
Key Features
- Corrosion Resistance: Excellent resistance to pitting and crevice corrosion.
- High Strength: Maintains strength at elevated temperatures.
- Weldability: Good weldability with standard welding techniques.
- Versatility: Suitable for a wide range of applications in various industries.
Chemical Composition
| Element | Composition (%) |
| Iron (Fe) | Balance |
| Nickel (Ni) | 30.0 - 34.0 |
| Chromium (Cr) | 19.0 - 21.0 |
| Molybdenum (Mo) | 4.0 - 5.0 |
| Carbon (C) | ≤ 0.020 |
| Manganese (Mn) | ≤ 2.0 |
| Silicon (Si) | ≤ 1.0 |
| Phosphorus (P) | ≤ 0.020 |
| Sulfur (S) | ≤ 0.010 |
Mechanical Properties
| Property | Value |
| Yield Strength (MPa) | ≥ 240 |
| Ultimate Tensile Strength (MPa) | ≥ 550 |
| Elongation (%) | ≥ 30 |
| Hardness (Rockwell B) | ≤ 90 |
Steel Grade
The steel grade for ASTM B675 N08367 is commonly referred to as UNS N08367. This designation is used to identify the specific alloy and its properties.
Application
N08367 stainless steel welded pipes are widely used in various industries, including:
- Chemical Processing: For handling corrosive chemicals.
- Oil and Gas: In pipelines and equipment exposed to harsh environments.
- Marine Applications: Due to its excellent resistance to seawater corrosion.
- Pharmaceuticals: For equipment requiring high purity and corrosion resistance.
Possible Alternative Grades
While ASTM B675 N08367 is a robust choice for many applications, there are alternative grades that may be considered based on specific requirements:
- ASTM A312 TP316L: Offers good corrosion resistance and is widely used in piping systems.
- ASTM A269 TP304: A more economical option with decent corrosion resistance.
- Alloy 625: Provides superior resistance to pitting and crevice corrosion in extreme environments.
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