Note B: For each reduction of 0.01 % carbon below the maximum specified, an
increase of 0.04 % manganese above the maximum specified will be
permitted to a maximum of 1.40 % for Grade 70-40 [485-275] and 1.00
% for the other grades.
Mechanical Properties
Tensile Strength, min ksi (Mpa)
Yield Point, min ksi (Mpa)
Elongation in 2 in. (50 mm), min %B
Reduction of area, min, %
Note B: When ICI test bars are used in tensile testing as provided for in
this specification, the gage length to reduced section diameter
ratio shall be 4 to 1.Note C:Grade 70-40 [485-275] may be used to meet the requirement of Grade
70-36 [485-250], when agreed upon between the manufacturer and the
purchaser.