Gray Iron Specifications

Specifying
Body

Spec.
Use

Use

Grade
or Class

Min. Tensile
Strength-PSI

Other Requirments

ASTM

A48-83

Castings intended
for general
engineering
use where strength
is a major
consideration.
Written exception
to this specification
takes precedence.

20
25

20,000
25,000

 I Test bar shall be related in cooling rate
to the critical section of the casting and
so specified.

II At least two (2) test bars shall be cast
and prepared for each casting lot, the lot
size being designated.

III Test bars shall be cast in dry silica
sand molds similar to that in which the
castings are poured.

IV Tension test shall be under true axial
loading.

V Hardness, chemical composition,
micro-structure, pressure tightness,
radio-graphic soundness, dimension,
surface finish, etc., can be established
as requirements upon written agreement
between manufacturer and purchaser.

30
35

30,000
35,000

40
45

40,000
45,000

50
55
60

50,000
55,000
60,000

ASTM




SAE

A159-83





J431

Automotive gray iron
castings.




Cast in sand molds
for the automotive,
truck, tractor, and
allied industries.

                  

Brinell
Hardness

Total
Carbon %

G1800

              

187 Max.

             

G2500

              

170-229

               

G2500a

              

170-229

3.40 Min.
Mandatory

G3000

              

187-241

  

G3500

            

207-255

           

G3500b

              

207-255

3.50 Min.
Mandatory

G3500c

            

207-255

3.40 Min.
Mandatory

G4000

              

217-269

                

G4000d

            

241-321

Alloys
specified

Tri-Cast Ltd.®
2128 Killian Road
Akron, Ohio 44312
Phone (330)733-8718
Fax (330)733-8786
sales@tri-cast.com for our sales office