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alloy 825
alloy 825
alloy 825
alloy 825
alloy 825
alloy 825
alloy 825
alloy 825

Alloy 825

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  • Description:

Sandmeyer Steel Company stocks Alloy 825 nickel alloy plate in thicknesses from .1875 (4.8mm) through 2.00 (50.8mm) for corrosion resistant applications in the air pollution control, chemical and petrochemical, food processing, nuclear, offshore oil and gas production, ore processing, petroleum refining, steel pickling and waste disposal industries.

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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





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


psi (min.)

(MPa)

psi (min.)

(MPa)

% (min.)

Rockwell B

49,000

338

96,000

662

45

135-165


Table 6 - Charpy Keyhole Impact Strength of Plate

Temperature

Orientation

Impact Strength*

°F

°C


ft-lb

J

Room

Room

Longitudinal

79.0

107

Room

Room

Transverse

83.0

113

-110

-43

Longitudinal

78.0

106

-110

-43

Transverse

78.5

106

-320

-196

Longitudinal

67.0

91

-320

-196

Transverse

71.5

97

-423

-253

Longitudinal

68.0

92

-423

-253

Transverse

68.0

92


Nickel Alloy Plate

Sandmeyer Steel Company stocks Alloy 825 nickel alloy plate in thicknesses from .1875" (4.8mm) through 2.00" (50.8mm) for corrosion resistant applications in the air pollution control, chemical and petrochemical, food processing, nuclear, offshore oil and gas production, ore processing, petroleum refining, steel pickling and waste disposal industries.


Alloy 825 (UNS N08825) is an austenitic nickel-iron-chromium alloy with additions of molybdenum, copper and titanium. It was developed to provide exceptional corrosion resistance in both oxidizing and reducing environments. The alloy is resistant to chloride stress-corrosion cracking and pitting. The addition of titanium stabilizes Alloy 825 against sensitization in the as-welded condition making the alloy resistant to intergranular attack after exposure to temperatures in a range that would sensitize un-stabilized stainless steels. The fabrication of Alloy 825 is typical of nickel-base alloys, with material being readily formable and weldable by a variety of techniques.


Specification Sheet Overview

for Alloy 825 (UNS N08825)
W.Nr. 2.4858:
An Austenitic Nickel-Iron-Chromium Alloy Developed for Exceptional Corrosion Resistance In Both Oxidizing and Reducing Environments

· General Properties

· Applications

· Standards

· Chemical Analysis

·  Physical Properties

· Mechanical Properties    · Corrosion Resistance

·  Stress-Corrosion Cracking Resistance

· Pitting Resistance

· Crevice Corrosion Resistance

·&nbsp Intergranular Corrosion Resistance


General Properties

Alloy 825 (UNS N08825) is an austenitic nickel-iron-chromium alloy with additions of molybdenum, copper and titanium. It was developed to provide exceptional resistance to numerous corrosive environments, both oxidizing and reducing.

The nickel content of Alloy 825 makes it resistant to chloride stress-corrosion cracking, and combined with molybdenum and copper, provides substantially improved corrosion resistance in reducing environments when compared to conventional austenitic stainless steels. The chromium and molybdenum content of Alloy 825 provides resistance to chloride pitting, as well as resistance to a variety of oxidizing atmospheres. The addition of titanium stabilizes the alloy against sensitization in the as-welded condition. This stabilization makes Alloy 825 resistant to intergranular attack after exposure in the temperature range which would typically sensitize un-stabilized stainless steels.

Alloy 825 is resistant to corrosion in a wide variety of process environments including sulfuric, sulfurous, phosphoric, nitric, hydrofluoric and organic acids and alkalis such as sodium or potassium hydroxide, and acidic chloride solutions.

The fabrication of Alloy 825 is typical of nickel-base alloys, with material readily formable and weldable by a variety 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


Physical Properties

Density

0.294 lbs/in3
8.14 g/cm3

Specific Heat

0.105 BTU/lb-°F
440 J/kg-°K

Modulus of Elasticity

28.3 psi x 106 (100°F)
196 MPa (38°C)

Magnetic Permeability

1.005 Oersted (μ at 200H)

Thermal Conductivity

76.8 BTU/hr/ft2/ft-°F (78°F)
11.3 W/m-°K (26°C)

Melting Range

2500 – 2550°F
1370 – 1400°C

Electrical Resistivity

678 Ohm circ mil/ft (78°F)
1.13 μ cm (26°C)

Linear Coefficient of Thermal Expansion

7.8 x 10-6 in / in°F (200°F)
4 m / m°C (93°F)


Alloy 825 has good mechanical properties from cryogenic to moderately high temperatures. Exposure to temperatures above 1000°F (540°C) can result in changes to the microstructure that will significantly lower ductility and impact strength. For that reason, Alloy 825 should not be utilized at temperatures where creep-rupture properties are design factors. The alloy can be strengthened substantially by cold work. Alloy 825 has good impact strength at room temperature, and retains it’s strength at cryogenic temperatures.


About Us

The company mainly deals in color-coated, galvanized, stainless steel pipes, stainless steel coils, stainless steel plates of various materials; hot-rolled series of rebar, medium and heavy plates, coils, I-beams, angle steels, channel steels, H-beams and other steel products and deep processing Service. (The company’s annual inventory is more than 50,000 tons).The company adheres to the concept of “integrity first, service-oriented”, relying on the strong strength of major domestic steel groups, exerting the company’s strong resource integration capabilities, and serving and satisfying the needs of customers both in China and at abroad.Additionally, Zhishang Steel also has a powerful and professional logistics distribution system, which can provide customers with efficient, fast and flexible logistics services at any time.Our business covers Southeast Asia, the Middle East, Africa, Australia, Europe, the United States and other countries.Looking forward to the future, in order to maintain in-depth and stable cooperation with customers both at home and abroad, all employees of Zhishang Steel will work harder to provide Better products and services to create more added value for customers.

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