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(a) Transverse Test Bars.- The transverse
test bars of the diameter specified by the Inspecting Authority
according to the main cross sectional thickness of the casting
represented, shall conform to the following dimensions:
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Diameter of test Bar
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Limits of Diameter
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Over all length
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Main cross-sectional thickness
of castings represented
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Inch
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inch
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Inches
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Inches
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0.6
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+0.045
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10
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Not exceeding 3/8
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0.875
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+0.065
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15
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Over 3/8 and not exceeding 3/4
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1.2
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+0.090
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21
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Over3/4 and not exceeding 1 1/8
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1.6
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+0.10
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21
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Over 1 1/8 and not exceeding 1 5/8
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2.1
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+0.10
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27
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Over 1 5/8
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Bars cast to a size in excess of the limits given above may
be machined to a diameter within the specified limits. Bars
cast within these limits of diameter may also be machined
before the transverse test is made, providing that the finished
diameter falls within these limits.
(b) Tensile Test Bars.- The tensile
test bars of the diameter specified by the Inspecting Authority,
according to the main cross-sectional thickness of the casting
represented shall conform to the dimensions shown in the following
table. Bars may be tested with either plain or screwed ends.
The test bars shall be cast as parallel bars of the diameters
given in Column B and then machined to the dimensions C and
P in the above table.
(c) For castings over 2 inches in thickness
a test bar of larger diameter than 2.1 inches may be used
by agreement between the manufacturer and the Inspecting Authority.
For diagram and table
see under clause (b) of this Regulation.
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