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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

≤ 0.4

0.29

≤ 0.48

0.33

Creep properties at 20°C

irrecoverable creep

≤ 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

≤ 0.4

0.21

≤ 0.48

0.27

Creep properties at 30°C

irrecoverable creep

≤ 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