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HASTELLOY C-276

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Super Alloy HASTELLOY(r) C276 alloy

Related Metals:

Nickelvac HC-276(tm)
Nicrofer 5716 hMoW(tm)
Carpenter C276 Alloy(tm)
Carpenter C276(tm)
HASTELLOY(r) C276 alloy(tm)
Nicrofer 5716(tm)                                    

Specifications:

ASTM B366
ASTM B574
ASTM B575
ASTM B619
ASTM B622
ASTM B626
ASTM F467
ASTM F468
DIN 2.4819
UNS N10276

Chemistry Data

Carbon

0.02 max

Chromium

14.5 - 16.5

Cobalt

2.5 max

Iron

4 - 7

Manganese

1 max

Molybdenum

15 - 17

Nickel

Balance

Phosphorus

0.03 max

Silicon

0.08 max

Sulphur

0.03 max

Tungsten

3 - 4.5

Vanadium

0.35 max

General Information

Principal Design Features

C-276 is a wrought corrosion-resistant alloy. A prime advantage of this alloy is that it generally does not require solution heat treatment after welding. It resists the formation of grain boundary precipitates that would degrade corrosion resistance.


Applications

Chemical process equipment and desulfurization of flue gas equipment.


Machinability

Good machinability, although the alloy work hardens as is true of the nickel base alloys in general.


Forming

Can be cold worked by all conventional methods.


Corrosion Resistance

Very good corrosion resistance to oxidizing and reducing acids. The alloy also has excellent resistance to stress-corrosion cracking and to pitting, as well as being very resistant to chlorine gas or compounds corrosion. Boiling HCl acid (2% concentra


Welding

Weldable by all common methods except that excessive heat input should be avoided. Can be used in the "as-welded" condition without further heat treatment for most corrosive applications.


Heat Treatment

Solution heat treatment is done at 2050 F followed by a rapid quench. The alloy is supplied in this condition. If hot forming or forging is done then the parts should be solution heat treated, if possible, before use.


Forging

The alloy can be forged or hot-upset by conventional means.


Hot Working

Can be hot formed or extruded. Should be solution heat treated following hot forming.


Cold Working

Readily cold worked by conventional methods.


Annealing

Normally supplied and use in the solution treated condition, a 2050 F soak followed by rapid quench.


Aging

Not normally done. The alloy is used in solution treated condition.


Tempering

Not applicable to this alloy.


Hardening

Hardened by cold working only.


Other Mechanical Props

"U" notch impact strength at -320 F of 263 ft. lbs. in solution treated condition.


Physical Data

Density (lb / cu. in.)

0.321

Specific Gravity

8.89

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

0.102

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

779

Melting Point (Deg F)

2500

Thermal Conductivity

78

Mean Coeff Thermal Expansion

6.2

Modulus of Elasticity Tension

29.8

Mechanical Data

Form

Plate

Condition

Heat treated at 2050 F(1121 C)

Temper

70

Tensile Strength

112

Yield Strength

52

Elongation

59

Rockwell

B88


Form

Plate

Condition

Heat treated at 2050 F(1121 C)

Temper

1000

Tensile Strength

86

Yield Strength

30

Elongation

59


Form

Sheet

Condition

Heat treated at 2050 F(1121 C)

Temper

70

Tensile Strength

108

Yield Strength

49

Elongation

61

Rockwell

B90


Form

Sheet

Condition

Heat treated at 2050 F(1121 C)

Temper

400

Tensile Strength

97

Yield Strength

42

Elongation

60


Form

Sheet

Condition

Heat treated at 2050 F(1121 C)

Temper

600

Tensile Strength

97

Yield Strength

34

Elongation

67


Form

Sheet

Condition

Heat treated at 2050 F(1121 C)

Temper

800

Tensile Strength

95

Yield Strength

31

Elongation

67

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