ASTM A27 / A27M
This specification covers carbon steel castings for general
applications that require up to 70 ksi (485 MPa) minimum tensile
strength.
Chemical Properties
| Grade |
Carbon,B max |
Manganese,B max |
Silicon, max |
Sulfur, max |
Phosphorus, max |
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
| Grade |
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.
