Meehanite Flake Graphite Types

PROPERTY

TYPE
AQ

TYPE
GM-60

TYPE
GA-50

TYPE
GC-40

TYPE
GE-30

TYPE
GF-20

Tensile Strength-psi

50/65,000

60,000

50,000

40,000

30,000

20,000

Proportional Limit-psi
.01% permanent set

25,000

25,000

22,000

14,500

11,500

9,500

Modulus of Elasticity-psi

22,000,000

21,500,000

20,000,000

16,500,000

13,000,000

9,000,000

Modulus of Rigidity-psi

9,500,000

9,500,000

8,750,000

7,250,000

5,550,000

4,000,000

Poisson's Ratio

0.33

0.33

0.32

0.30

0.27

0.24

Modulus of Rupture-psi

93,000

93,000

90,000

80,000

61,000

41,000

Compression Strength-psi

200,000

200,000

180,000

150,000

120,000

90,000

Fatigue Strength-psi

30,000

25,000

22,000

17,500

13,500

11,000

Shear Strength-psi

 

53,000

50,000

40,000

30,000

21,550

Single Impact-Izod
(0.798") dia. Unnotched Bar

30-40

30-40

25-35

12-20

6-12

4-9

Brinell Hardness (Nominal)

280-550

230

220

190

up to 160

150

Machinability Rating (Dalcher)

52

50

48

47

38

30

Thermal Conductivity
50-450 °F. BTU/Hr/Sq.
Ft./Inch Thickness/°F

 

355

350

325

290

---

Coefficient of Thermal
Expansion Per °F. from
100 ° to 1000 °F.

.00000675

.00000705

.00000620

.00000660

.00000690

---

Specific Gravity

7.34

7.34

7.31

7.25

7.06

6.80

Solid Contraction
(Patternmaker's Shrinkage)

5/32"-6/32"
per ft.
(1.3-1.5%)

5/32"-6/32"
per ft.
(1.3-1.5%)

5/32"-6/32"
per ft.
(1.3-1.5%)

4/32"-5/32"
per ft.
(1.0-1.3%)

1/10"-1/8"
per ft.
(0.8-1.0%)

 
1/10"
(0.8%)

Meehanite Nodular Graphite Types

PROPERTY

TYPE
SP-80

TYPE
SH-100

TYPE
SF-60

TYPE
AQS

Tensile Strength-psi

80/100,000

100/170,000

>60,000

80,000/180,000

Yield Strength-psi

60/75,000

70/130,000

>40,000

70/140,000

Modulus of Elasticity (tension) EX 106

25

24

24

25

Elongation %

3%-10%

1%-5%

15%-25%

1%-3%

Endurance Limit (unnotched)

39,000

43,000

30,000

53,000

Endurance Ratio (unnotched)
(45° notch)

0.49
0.35

0.33
0.25

0.50
0.35

0.33

Poisson's Ratio

0.37

0.37

0.32

 

Brinell Hardness (Nominal)

200

207/600

161

225/500

Specific Gravity

7.20

7.22

7.18

 

Solid Contraction
(Patternmaker's Shrinkage)

5/32" per ft.
1.3%

5/32" per ft.
1.3%

1/8" per ft.
1.0%

5/32"per ft.
1.3%

Specifications Met

ASTM-A536
(80-50-06)

ASTM-A536
(100-70-03)

ASME SA395
MIL-1-24137
 Ships
ASTM A395
ASTM A536