23    The  following  table  gives  approximately  the  strength  of  vari-
ous materials  used  in  automobile  construction:

TABLE  2     STRENGTH  OF  AUTOMOBILE  MATERIALS

.  _  Elastic  limit    I  Tensile  strength

Aluminum  alloys Stoll  million

Photpbor  bronse 12  to  14  million

Manganese  bronse 15  million

Aluminum  bronse 15  million

Wrought  iron 28  million

Mild  open  hearth  steel 28  million

Tool  steel 29  million

Nickel  steel 28  million

Nickel  chrome  steel 30  million              160.000                    180.000

Vanaditmi  steel  treated 30  million               220.000                    228.000


All  of  the  above  materials  stand  well  under  dynamic  stress  with  the
exception  of  the  tool  steel,  which  should  not  be  used  for  this  purpose.
lOM  to  15M

20Mto30M

20.000

30.000

35,000

50.000

•50.000

75.000

30.000

40.000

40.000

80.000

80.000

110,000

80.000

110.000

No.  1149

EUROPEAN  RAILWAY  MOTOR  CARS

By  B.  D.  gray,  providence,  R.  I.
