ASTM B423
ASTM B423 Basic Info
When working with ASTM B423, it’s essential to adhere to safety precautions to prevent accidents and ensure product quality. Ensure proper ventilation in areas where welding or cutting operations are performed on nickel-iron-chromium-molybdenum-copper alloys covered by this standard to prevent exposure to fumes. Additionally, use appropriate personal protective equipment, such as gloves and eye protection, to minimize the risk of injury when handling these materials.
Characteristics of ASTM B423
- Corrosion Resistance: ASTM B423 specifies seamless pipes and tubes made from nickel-iron-chromium-molybdenum-copper alloys, renowned for their exceptional resistance to corrosion in various environments, including acids, alkalis, and seawater.
- High Temperature Performance: The alloys covered by ASTM B423 maintain their mechanical properties and corrosion resistance at elevated temperatures, making them suitable for applications where exposure to extreme heat is common, such as in chemical processing and petrochemical plants.
- Mechanical Properties: ASTM B423 outlines the mechanical properties requirements for seamless pipes and tubes, ensuring they possess adequate strength, ductility, and toughness to withstand the demands of their intended applications, contributing to their long-term reliability and performance.
ASTM B423 Data Sheet
Steel Grades
Dimensions and Tol.
Equivalent Steel Grades
Chemical Composition
Mechanical Properties
Steel Grades
UNS N08825
UNS N08221
UNS N06845
Dimensions and Tol.
Shape:
Seamless pipes and tubes.
Outside Diameter (OD) Tolerance:
Specified in the product specification.
Wall Thickness Tolerance:
Specified in the product specification.
Length:
Specified in the product specification or agreed upon between the purchaser and the supplier.
Straightness:
The pipe or tube shall not depart from straightness by more than 1/8 inch in any 5-foot length. For 16 feet or longer, a straightness tolerance of 1/8 inch for each 5 feet or fraction thereof is permitted.
Weight:
The weight per unit length of the pipe or tube shall not vary from the specified weight by more than 10%.
Ends:
The ends of the pipe or tube shall be furnished as agreed upon between the purchaser and the supplier.
Workmanship, Finish, and Appearance:
The pipe or tube shall be uniform in quality and condition, smooth, free from injurious defects, and have a workmanlike finish. The pipe or tube shall be free from scale and shall be commercially straight.
Equivalent Steel Grades
United States:
Standard: ASTM B423
United Kingdom:
Standard: BS 3074, BS 3076
Germany:
Standard: DIN 17751, DIN 17752
Japan:
Standard: JIS G4901, JIS G4902
Chemical Composition
UNS N08825
Carbon (C): 0.05 max
Manganese (Mn): 1.00 max
Phosphorus (P): 0.04 max
Sulfur (S): 0.03 max
Silicon (Si): 0.5 max
Chromium (Cr): 19.5 – 23.5
Nickel (Ni): 38.0 – 46.0
Molybdenum (Mo): 2.5 – 3.5
Copper (Cu): 1.5 – 3.0
Iron (Fe): Balance
Aluminum (Al): 0.2 max
Titanium (Ti): 0.2 max
UNS N08221
Carbon (C): 0.05 max
Manganese (Mn): 1.00 max
Phosphorus (P): 0.04 max
Sulfur (S): 0.03 max
Silicon (Si): 0.5 max
Chromium (Cr): 21.0 – 23.5
Nickel (Ni): 30.0 – 34.0
Molybdenum (Mo): 2.0 – 3.0
Copper (Cu): 1.5 – 2.5
Iron (Fe): Balance
Nitrogen (N): 0.10 max
Aluminum (Al): 0.20 – 0.40
UNS N06845
Carbon (C): 0.05 max
Manganese (Mn): 1.00 max
Phosphorus (P): 0.04 max
Sulfur (S): 0.03 max
Silicon (Si): 0.5 max
Chromium (Cr): 20.0 – 22.0
Nickel (Ni): 30.0 – 33.0
Molybdenum (Mo): 3.0 – 4.0
Copper (Cu): 0.5 – 1.5
Iron (Fe): Balance
Aluminum (Al): 0.35 – 0.75
Titanium (Ti): 0.20 – 0.60
Zirconium (Zr): 0.01 – 0.05
Mechanical Properties
UNS N08825
Tensile Strength, min: 550 MPa (80 ksi)
Yield Strength (0.2% offset), min: 220 MPa (32 ksi)
Elongation in 2 inches (50 mm) or 4D, min: 30%
UNS N08221
Tensile Strength, min: 550 MPa (80 ksi)
Yield Strength (0.2% offset), min: 220 MPa (32 ksi)
Elongation in 2 inches (50 mm) or 4D, min: 30%
UNS N06845
Tensile Strength, min: 550 MPa (80 ksi)
Yield Strength (0.2% offset), min: 220 MPa (32 ksi)
Elongation in 2 inches (50 mm) or 4D, min: 30%
ASTM B423 Material Cost Analysis: Understanding Pricing Factors and Budgeting
- Material Composition: The types and percentages of metals or alloys used in ASTM B423 materials, impacting their cost based on availability and market demand.
- Manufacturing Process: Different processes like extrusion, forging, or casting incur varying expenses, contributing to the final price of ASTM B423 materials.
- Market Demand and Supply: Fluctuations in demand and supply influenced by market trends, economic conditions, and geopolitical factors affect the availability and cost of ASTM B423 materials.
- Quality Standards: ASTM B423 materials meeting specific quality standards are priced higher due to assured quality and reliability, ensuring they meet industry requirements.
- Additional Costs: Considerations like transportation, storage, and handling fees, which vary based on factors such as distance, mode of transportation, and quantity ordered.
- Budgeting Considerations: Comprehensive budgeting involves assessing all relevant cost factors to ensure projects involving ASTM B423 materials remain within budget constraints.
