What is ASTM B564 UNS N08825?
ASTM B564 is a standard specification for nickel alloy forgings. It covers a range of nickel alloys, including UNS N08825, also known as Incoloy 825. This alloy is a nickel-iron-chromium alloy with additions of molybdenum and copper. 2.4858 alloy 825 is highly resistant to corrosive environments such as acids, alkalis, and saltwater.
UNS N08825 material has a high level of mechanical strength and toughness, allowing it to withstand high-stress applications. This ASTM B564 N08825 is commonly used in the chemical processing, oil and gas, and nuclear industries. Alloy 825 Inconel is also used in applications where resistance to pitting, crevice corrosion, and stress corrosion cracking is required.
ASTM B564 UNS N08825 covers the manufacture of forgings, including flanges, fittings, valves, and other components. The specification defines the chemical composition, mechanical properties, and heat treatment requirements for this alloy.
ASTM B564 UNS N08825 Chemical Composition
- Nickel: 38-46%
- Iron: 22% min
- Chromium: 19.5-23.5%
- Molybdenum: 2.5-3.5%
- Copper: 1.5-3%
- Titanium: 0.6-1.2%
- Aluminium: 0.2% max
- Carbon: 0.05% max
- Manganese: 1% max
- Silicon: 0.5% max
- Sulfur: 0.03% max
- Phosphorus: 0.03% max
ASTM B564 UNS N08825 Mechanical Properties
The mechanical properties of ASTM B564 Incoloy 825 at room temperature are as follows:
- Tensile strength: 550 MPa
- Yield strength: 220 MPa
- Elongation: 30%
- Hardness: 70 HRB max
Incoloy 825 UNS N08825 Heat Treatment
ASME SB564 UNS N08825 is typically heat treated at a temperature range of 1000-1100°C followed by water quenching. This treatment improves the mechanical properties and corrosion resistance of the alloy.
ASTM B564 2.4858 Alloy 825 Forgings, Flanges Sizes
- ASTM B564 UNS N08825 Flanges: The ASME B16.5 standard sizes for flanges range from ½ inches to 24 inches. The thickness of the flanges depends on the pressure class, which ranges from 150 to 2500.
- ASTM B564 N08825 Fittings: The ASME B16.11 standard size range for fittings is from ½ inches to 8 inches. The fittings are available in various types, such as elbows, tees, reducers, and couplings.
- Incoloy 825 UNS N08825 Valves: The standard size range for valves is from ½ inches to 3 inches. The valves may be available in a variety of types such as gate, globe, check, and ball valves.
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