UNS S38815 Stainless steel
UNS S38815 (also known as Alloy 825) is a nickel-iron-chromium
alloy with elements such as molybdenum, copper, and titanium added
to provide excellent corrosion resistance and high temperature
properties. It is especially suitable for strong acid, strong
alkali and high temperature environment, and is widely used in
chemical industry, oil, natural gas, ocean engineering and other
fields.
Main parameter of UNS S38815 Stainless steel
Chemical composition (typical value, %) :
- Nickel (Ni): 38.0-46.0
- Chromium (Cr): 19.5-23.5
- Iron (Fe): margin
- Molybdenum (Mo): 2.5-3.5
- Copper (Cu): 1.5-3.0
- Titanium (Ti): 0.6-1.2
- Carbon (C): ≤0.05
- Manganese (Mn): ≤1.0
- Silicon (Si): ≤0.5
- Sulfur (S): ≤0.03
- Aluminum (Al): ≤0.2
Mechanical properties of UNS S38815 Stainless steel
- Tensile strength (Rm): ≥586 MPa
- Yield strength (Rp0.2): ≥241 MPa
- Elongation (A5): ≥30%
- Hardness (HB): ≤200
Physical properties of UNS S38815 Stainless steel
- Density: 8.14 g/cm³
- Melting point: 1370-1400°C
- Coefficient of thermal expansion (20-100°C): 14.0 x 10⁻⁶/K
- Thermal conductivity (20°C): 11.1W /m·K
- Resistivity (20°C): 1.12Ω ·mm²/m
Peculiarity of UNS S38815 Stainless steel
- Excellent corrosion resistance:Excellent corrosion resistance to strong acids such as sulfuric
acid, phosphoric acid, nitric acid and alkaline media.
- Resistance to pitting and crevice corrosion in chloride
environments.
- High temperature performance:It maintains good mechanical properties and oxidation resistance at
high temperatures.
- Stress corrosion cracking resistance:Excellent performance in high temperature and pressure
environments, suitable for chemical and petroleum industries.
- Good workability and weldability:Easy to process and form, suitable for the manufacture of complex
parts.
- Various welding methods can be used (e.g. TIG, MIG, electrode arc
welding).
- Versatility:Suitable for oxidizing and reducing media.
Advantage of UNS S38815 Stainless steel
- Wide applicability:Suitable for various corrosive media and high temperature
environment.
- Long life and reliability:Excellent corrosion resistance and mechanical properties extend the
service life of the equipment.
- Economy:Reduce maintenance and replacement frequency to reduce long-term
costs.
- Environmental protection:Suitable for environmental protection equipment, such as flue gas
desulfurization equipment and waste water treatment equipment.
Equal Grade of UNS S38815 Stainless Steel
- UNS S38815
- Alloy 825
- W.N.R.2.4858
- DIN 2.4858
- Incoloy 825
Standard of UNS S38815 Stainless steel
UNS S38815 stainless steel meets the following standards:
- ASTM: UNS S38815
- DIN: DIN 2.4858
- EN: 2.4858
- ISO: ISO 6208
Application field of UNS S38815 Stainless steel
- Chemical Industry:Used in the manufacture of reactors, heat exchangers, pipes,
valves, etc.
- Oil and Gas:Used in oil well pipe, conveying pipe, underground equipment, etc.
- Marine Engineering:Suitable for desalination equipment, offshore platform, sea water
pump, etc.
- Environmental protection Project:Used for flue gas desulfurization equipment, wastewater treatment
equipment, etc.
- The Nuclear industry:Used in nuclear waste disposal equipment and reactor components.
- Food processing:For equipment and containers with high hygiene requirements.
UNS S38815 (Alloy 825) stainless steel is an ideal material for the
chemical, oil and gas industries due to its excellent corrosion
resistance, high temperature properties and versatility. It is
stable in harsh environments, significantly extending equipment
life and reducing maintenance costs.
