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Tensile Test.- (a) The tensile strength of the material cut from the
finished tube shall conform to the following requirement.
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Tube
Yield strength
Tensile strength
% Elongation+
Grade
Mpa(kgf/mm sq.)
Mpa(kgf/mm2)
(Min)
(Min)
(Min)___________
WC1
195
320/480
25
(19.9)
(32.6/49.0)
WC2
235
360/500
24
(24.0)
(36.7/51.00)
WC3
245
440/580
21 _____________
(25.0)
(44.9/59.2)___________________________
+
On gauge length 5.65ÖA
where A is the initial cross sectional area of the specimen on
the gauge length.
(b) Allowable permissible stress at elevated temperature. Allowable
permissible stress as per the respective code
shall be strictly followed.
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