铝合金 2219 板材信息

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A L L O Y D E S C R I P T I O N

This alloy is used in aerospace applications such as space booster and fuel tanks. The alloy is readily weldable. It is useful over a temperature range of -452º to 600 ºF. The alloy also has good fracture toughness. The T8 temper is resistant to stress corrosion cracking.

T Y P I C A L M E C H A N I C A L P R O P E R T I E S ( L O N G I T U D I N A L )

Temper

Tensile (.500" Dia. Specimen)

Hardness

Shear

Fatigue*

Modulus

 

 

Ultimate

 

Yield

 

Elongation/4D

Brinell 500kg 10 mm

Ultimate Shearing Strength

 

Endurance Limit -

R.R. Moore Type

 

Modulus of Elasticity

KSI

MPa

KSI

MPa

%

 

KSI

MPa

KSI

MPa

KSI x 103

Gpa

T351

52

359

36

248

17

95

-

-

-

-

10.6

73.1

T851

66

455

51

352

10

125

-

-

15

103

10.6

73.1

T37

57

393

46

317

11

-

-

-

15

103

10.6

73.1

T87

69

476

57

393

10

-

-

-

15

103

10.6

73.1

*5 x 10E8 cycles of reversed stress

 

C O M P A R A T I V E C H A R A C T E R I S T I C S

Temper

Corrosion Resistance

Cold Workability3

Machinability3

Anodize Response3

Brazeability4

Weldability4

 

General1

Stress2

 

 

 

 

Gas

Arc

Spot

T351

D

C

C

B

B

D

A

A

A

T851

D

B

D

B

B

D

A

A

A

 

1       Ratings A through E are relative ratings in decreasing order of merit, based on exposures to sodium chloride solution by intermittent spraying or immersion. Alloys with A and B ratings can be used in industrial and seacoast atmospheres without protection. Alloys with C, D and E ratings generally should be protected at least on faying surfaces.

2       Stress-corrosion cracking ratings are based on service experience and laboratory tests of specimens exposed to the 3.5% sodium chloride alternate immersion test. A= No known instance of failure in service or in laboratory tests.

B= No known instance of failure in service; limited failures in laboratory tests of short transverse specimens.

C= Service failures with sustained tension stress acting in short transverse direction relative to grain structure; limited failures in laboratory tests of long transverse specimens.

D= Limited service failures with sustained longitudinal or long transverse

3       Ratings A through D for Workability (cold), A through E for Machinability and A through C for Anodize Response, are relative ratings in decreasing order of merit.

4       Ratings A through D for Weldability and Brazeability are relative ratings defined as follows: A= Generally weldable by all commercial procedures and methods.

B= Weldable with special techniques or for specific applications that justify preliminary trials or testing to develop welding procedure and weld performance. C= Limited weldability because of crack sensitivity or loss in resistance to corrosion and mechanical properties.

D= No commonly used welding methods have been developed.

 

 

 

 

 

 

 

Continued Page 2 of 2

 

 

 

 

 

C H E M I C A L  C O M P O S I T I O N  L I M I T S

 

Others

Weight %

Si

Fe

Cu

Mn

Mg

Zn

Ti

V

Zx

Each

Total

Minimum

-

-

5.8

0.20

-

-

0.02

0.05

0.10

-

-

Maximum

0.20

0.30

6.8

0.40

0.02

0.10

0.10

0.15

0.25

0.05

0.15

 

T Y P I C A L  P H Y S I C A L  P R O P E R T I E S

Characteristic

 

English

Metric

Nominal Density (68 °F/20 °C)

 

0.103 lbs./in.3

2.84 Mg/m3

Melting Range

 

1010 °F - 1190 °F

543 °C - 643 °C

Specific Heat (212 °F/100 °C)

 

0.206 BTU/lb. - °F

864 J/kg - °K

 

 

 

Coefficient of Thermal Expansion

 

Linear

68 °F-212 °F

20 °C-100 °C

 

12.5 micro in./in.-°F

 

22.5 micro m/m -°K

 

Volumetric 68 °F/20 °C

 

3.62 x 10-5in.3/in.3 -°F

 

65 x 10-6m3/m3 -°K

 

Thermal Conductivity (68 °F/20 °C)

T351

67 BTU/ft. - hr. - °F

116 W/m - °K

T851

75 BTU/ft. - hr. - °F

130 W/m - °K

 

Electrical Conductivity (68 °F/20 °C)

 

Equal Volume

T351

28% IACS

T851

30% IACS

 

2020年8月12日 17:05
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