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INCOLOY 825 COMPOSITION

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Super Alloy Incoloy(r) Alloy 825

Related Metals:

Sanicro 41(tm)
Nicrofer 4221(tm)
VLX825(tm)
Cabvalloy alloy 825(tm)
Nickelvac 825(tm)
Cabvalloy 825(tm)                                    

Specifications:

ASTM B163
ASTM B423
ASTM B424
ASTM B425
ASTM B564
ASTM B704
ASTM B705
DIN 2.4858
UNS N08825

Chemistry Data

Aluminum

0.2 max

Carbon

0.05 max

Chromium

19.5 - 23.5

Copper

1.5 - 3

Iron

Balance

Manganese

1 max

Molybdenum

2.5 - 3.5

Nickel

38 - 46

Phosphorus

0.03 max

Silicon

0.5 max

Sulphur

0.03 max

Titanium

0.6 - 1.2

General Information

Principal Design Features

An austenitic nickel-iron-chromium alloy with additions of other alloying elements to enhance resistance to chemical corrosion.


Applications

Chemical process equipment, pickling, acid production piping and vessels.


Machinability

Conventional machining techniques used for iron based alloys may be used. This alloy does work-harden during machining and has higher strength and "gumminess" not typical of steels. Heavy duty machining equipment and tooling should be used to minimize c


Forming

This alloy has good ductility and may be readily formed by all conventional methods. Because the alloy is stronger than regular steel it requires more powerful equipment to accomplish forming. Heavy-duty lubricants should be used during cold forming. I


Corrosion Resistance

The alloy has good resistance to corrosion from phosphoric acid, nitric acid, hydrochloric acid, and organic acids. It also resists attack by wet sulfur dioxide and sulfurous acid and is also resistant to stress-corrosion cracking.


Welding

The commonly used welding methods work well with this alloy. Matching alloy filler metal should be used. If matching alloy is not available then the nearest alloy richer in the essential chemistry (Ni, Co, Cr, Mo) should be used. All weld beads should


Heat Treatment

Anneal at 1750 F and rapid air cool.


Forging

The alloy is readily forged in the temperature range of 2000 F to 1800 F. However a final anneal at 1750 F is then required to restore optimum corrosion properties.


Hot Working

Hot working may be done but should be accomplished at temperatures under 1700 F to maintain optimum corrosion resistance of the alloy.


Cold Working

Cold forming may be done using standard tooling although plain carbon tool steels are not recommended for forming as they tend to produce galling. Soft die materials (bronze, zinc alloys, etc.) minimize galling and produce good finishes, but die life is


Annealing

Anneal at 1750 F followed by rapid air cooling.


Hardening

Hardens by cold working only.


Physical Data

Density (lb / cu. in.)

0.294

Specific Gravity

8.14

Specific Heat (Btu/lb/Deg F - [32-212 Deg F])

0.105

Electrical Resistivity (microhm-cm (at 68 Deg F))

678

Melting Point (Deg F)

2525

Poissons Ratio

0.42

Thermal Conductivity

78.5

Mean Coeff Thermal Expansion

7.8

Magnetic Permeability

1.005

Modulus of Elasticity Tension

29.8

Mechanical Data

MSO currently has no data available for this grade.

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