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Introduction of Nickel Alloy Incoloy 825
Oct 24, 2017

Alloy 825 is a nickel-iron-chromium-molybdenum alloy with good corrosion resistance to sulfuric and phosphoric acids and sea water. It is similar to alloy 800 but with improved resistance to aqueous corrosion. Although not fully resistant to stress-corrosion cracking in boiling magnesium chloride, alloy 825 has good resistance in neutral chloride media.


Applications

· Chemical Processing

· Pollution-control

· Oil and gas well piping

· Nuclear fuel reprocessing

· Components in Pickling equipment like heating coils, tanks, baskets and chains

· Acid production


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


Chemistry Data 

Elements

Al

C

Cr

Cu

Fe

Mn

Mo

Comp. %

0.2 max

0.05 max

19.5 – 23.5

1.5-3

Balance

max.

2.5-3.5

Elements

P

Ti

S

Si

Ni



Comp. %

0.03 max

0.6-1.2

0.03 max

0.5 max

38-46




ASTM Specifications  

Pipe Smls

Tube Smls

Sheet/Plate

Bar

ASTM B 423ASTM-A-312ASTM-A-312

  ASTM B 163

ASTM B 424  AAAMS 5596

ASTM B 425


Mechanical Properties(Typical Room-Temperature Tensile Properties) 

Product Form

Condition

Tensile

 Ksi(MPa)

.2% Yield

Ksi(MPa)

Elongation

(%)

Rod & Bar

Annealed

100(690)

47(324)

45

Tube & Pipe

Annealed

112(772)

64(441)

36

Tube & Pipe

Cold-Drawn

145(1000)

129(889)

15

Plate

Annealed

96(662)

49(338)

45

Sheet

Annealed

110(758)

61(421)

39





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