铝合金7175与7475 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 heavily utilized by the aircraft and ordnance industries because of its superior strength.

 

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

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

T651

85

586

74

510

13

 

 

 

 

 

10.4

71

T7351

72

 

61

 

13

-

 

 

 

 

10.4

71

T7651

77

 

67

 

12

 

 

 

 

 

10.4

71

W51

 

 

 

 

 

 

 

 

 

 

 

 

*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

T651

C

C

D

B

B

D

D

B

B

T7351

C

B

D

B

B

D

D

D

B

 

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.

 

 

 

 

 

 

 

 

 

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

Continued Page 2 of 2

 

 

Others

Weight %

Si

Fe

Cu

Mn

Mg

Cr

Zn

Ti

Each

Total

Minimum

-

-

1.2

-

1.9

0.18

5.2

-

-

-

Maximum

0.10

0.12

1.9

0.60

2.6

0.25

6.2

-

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)

 

0.101 lbs./in.3

2.80 Mg/m3

Melting Range

 

990 °F - 1175 °F

532 °C - 635 °C

Specific Heat (212 °F/100 °C)

 

0.207 BTU/lb. - °F

865 J/kg - °K

 

 

 

Coefficient of Thermal Expansion

 

Linear

68 °F-212 °F

20 °C-100 °C

 

13.0 micro in./in.-°F

 

23.4 micro m/m -°K

 

Volumetric 68 °F/20 °C

 

3.78 x 10-5in.3/in.3 -°F

 

68 x 10-6m3/m3 -°K

 

Thermal Conductivity (68 °F/20 °C)

T651

82 BTU/ft. - hr. - °F

142 W/m - °K

T7351

94 BTU/ft. - hr. - °F

163 W/m - °K

 

 

Electrical Conductivity (68 °F/20 °C)

 

Equal Volume

T651

36% IACS

T7351

42% IACS

 

Equal Weight

T651

107% IACS

T7351

-

 

2020年8月12日 17:07
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