Scope

ASTM A48 covers gray iron castings intended for general use. A48 castings are supplied based solely on tensile strength, no chemical requirements or ductility is specified.

A48 Mechanical Properties

Class Number

Tensile Strength, ksi min

20

20

25

25

30

30

35

35

40

40

45

45

50

50

55

55

60

60

A48 Class Type

Class Type

Nominal Test Bar Diameter, inches

A

0.88

B

1.2

C

2.0

S

Agreed on between manufacturer and purchaser

Example, casting would be called out as A48-30A

Casting Examples

Popular examples of castings often made to ASTM A48 include Hillside Washers and Ogee Washers.