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Alloy 825 Plates


Champak industries stocks alloy 825 plates or alloy 825 nickel alloy plate in thicknesses from.1875" (4.8mm) thru 2.00" (50.8mm) for corrosion resistant application within the air pollutants control, chemical and petrochemical, food processing, nuclear, offshore oil and gas manufacturing, ore processing, petroleum refining, metal pickling and waste disposal industries.

Available thicknesses for Alloy 825

3/16" 1/4" 3/8" 1/2" 5/8" 3/4"
4.8mm 6.3mm 9.5mm 12.7mm 15.9mm 19mm
1" 1 1/4" 1 1/2" 1 3/4" 2"
25.4mm 31.8mm 38.1mm 44.5mm 50.8mm
Alloy 825 plates or alloy 825 (USN N08825) is an austenitic nickel-iron-chromium alloy with additions of molybdenum, copper and titanium. It became advanced to provide superb corrosion resistance in each oxidizing and decreasing environments. The alloy is immune to chloride stress-corrosion cracking and pitting. The addition of titanium stabilizes alloy 825 in opposition to sensitization in the as-welded situation making the alloy immune to inter-granular assault after publicity to temperatures in a range that could sensitize un-stabilized stainless steels. The fabrication of alloy 825 is typical of nickel-base alloys, with cloth being easily formable and weld-able through a spread of techniques.

Applications

• Air Pollution Control
o Scrubbers

• Chemical Processing Equipment
o Acids
o Alkalis

• Food Process Equipment

• Nuclear
o Fuel Reprocessing
 Fuel Element Dissolvers
o Waste Handling

• Offshore Oil and Gas Production
o Seawater Heat Exchangers
o Piping Systems
o Sour Gas Components

• Ore Processing
o Copper Refining Equipment

• Petroleum Refining
o Air-cooled Heat Exchangers


• Steel Pickling Equipment
o Heating Coils
o Tanks
o Crates
o Baskets

• Waste Disposal
o Injection Well Piping Systems

Standards

ASTM..................B 424
ASME..................SB 424

Chemical Analysis

Typical Values (Weight %)

Nickel 38.0 min.–46.0 max. Iron 22.0 min.
Chromium 19.5 min.–23.5 max. Molybdenum 2.5 min.–3.5 max.
Molybdenum 8.0 min.-10.0 max. Copper 1.5 min.–3.0 max.
Titanium 0.6 min.–1.2 max. Carbon 0.05 max.
Niobium (plus Tantalum) 3.15 min.-4.15 max. Titanium 0.40
Carbon 0.10 Manganese 1.00 max.
Sulfur 0.03 max. Silicon 0.5 max.
Aluminium 0.2 max.

Mechanical Properties

Typical Room Temperature Mechanical Properties, Mill Annealed

Yield Strength
0.2% Offset
Ultimate Tensile
Strength
Elongation
in 2 in.
Hardness
psi (min.) (MPa) psi (min.) (MPa) % (min.) Rockwell B
49,000 338 96,000 662 45 135-165
Temperature,°F 70 400 600 800 1000 1200 1400 1600
Ultimate Tensile Strength, ksi 144 134 132 132 130 119 78 40
0.2% Yield Strength, ksi 84 66 63 61 61 60 59 39
Elongation, % 44 45 42.5 45 48 34 59 117

Typical Rupture Strength Bar, Stress to Rupture at Indicated Time

Temperature, °F 1200 1300 1400
100 Hours, ksi 59 34 18
1,000 Hours, ksi 43 23 12
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