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Test Board Physical Properties

Property

Unit

Average

Individual

Requirement

Result

Requirement

Result

Modulus of rupture (MOR) (after preconditioning)

MPa

≥ 17.2

38.5

≥ 13.8

25.7

Modulus of elasticity (MOE) (after preconditioning)

MPa

≥ 3 100

5 254

≥ 2 480

4 135

Internal bond (after preconditioning)

MPa

≥ 0.345

0.632

≥ 0.276

0.570

 Bond durability   - MOR after 2-hour boil (tested when wet)

MPa

≥ 8.6

20.3

≥ 6.9

15.5

 Bond durability - MOR after six cycles

MPa

≥ 8.6

33.6

≥ 6.9

23.6

Thickness swell: 24-hour soak

%

≤ 25

8.5

≤ 30

9.9

Linear expansion: oven-dry to saturated

%

≤ 0.40

0.23

≤ 0.48

0.28

Linear expansion: 50% to 90% RH

%

≤ 0.20

0.10

≤ 0.24

0.13

Creep Properties

Property

Units

Average

Individual

Requirement

Result

Requirement

Result

Creep properties at 20°C -  cumulative creep

mm

≤ 1.7

1.52

≤ 2.04

1.63

Creep properties at 20°C - secondary creep

mm

≤ 0.4

0.29

≤ 0.48

0.33

Creep properties at 20°C - irrecoverable creep

mm

≤ 1.1

0.92

≤ 1.32

0.98

Creep properties at 30°C - cumulative creep

mm

≤ 2.2

2.36Footnote (1)

≤ 2.64

3.18Footnote (1)

Creep properties at 30°C - secondary creep

mm

≤ 0.4

0.21

≤ 0.48

0.27

Creep properties at 30°C - irrecoverable creep

mm

≤ 1.5

1.60Footnote (1)

≤ 1.8

2.19Footnote (1)

Percent increase at higher ambient temperature (30°C) of creep properties  - cumulative creep

%

≤ 35

56Footnote (1)

≤ 42

95Footnote (1)

Percent increase at higher ambient temperature (30°C) of creep properties - secondary creep

%

≤ 0

−27Footnote (1)

0

−18Footnote (1)

Percent increase at higher ambient temperature (30°C) of creep properties - irrecoverable creep

%

≤ 50

74Footnote (1)

≤ 60

123Footnote (1)

Retention of Residual Properties

Exposure

Residual Property Requirements (MPa)

MOR

MOE

Internal BondFootnote (1)

Average

Individual

Average

Individual

Average

Req't

Result

Req't

Result

Req't

Result

Req't

Result

Req't

Result

After 2-hour boil (modified)

≥ 8.6

36.4

≥ 6.9

24.0

≥ 1 550

5 576

≥ 1 240

4 683

≥ 0.104

0.323

After six-cycle test

≥ 8.6

33.6

≥ 6.9

23.6

≥ 2 015

5 060

≥ 1 612

3 567

≥ 0.035

0.153

At −20°C

≥ 17.2

43.6

≥ 13.8

25.5

≥ 3 100

5 810

≥ 2 480

4 702

≥ 0.0345

0.681

 After fungal exposure -Aspergillus niger v. Teigh

≥ 13.8

39.3

≥ 11.0

32.7

≥ 2 480

5 253

≥ 1 984

4 542

≥ 0.207

0.501

After fungal exposure -Penicillium luteum

≥ 13.8

38.2

≥ 11.0

28.6

≥ 2 480

5 119

≥ 1 984

4 226

≥ 0.207

0.390

After soaking in 1% hydrochloric acid

≥ 7.7

28.2

≥ 6.2

20.4

≥ 2 480

5 080

≥ 1 984

3 995

≥ 0.069

0.147

After soaking in 1% sodium   hydroxide

≥ 12.0

28.5

≥ 9.6

21.3

≥ 2 325

4 480

≥ 1 860

3 619

≥ 0.155

0.244

 After soaking in water

≥ 14.6

34.6

≥ 11.7

24.8

≥ 2 790

4 979

≥ 2 232

4 251

≥ 0.224

0.321