Table 1

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Table1 Mechanical properties of 1095 steel heat treated by three methods:

Test
Heat treatment
Hardness
HRC
Impact Strength J ft.ib
Elongation in 25mm %
1
Water quenched and tempered
53.0
16
12
-
2
Water quenched and tempered
52.5
19
14
-
3
Martempered and tempered
53.0
38
28
-
4
Martempered and tempered
52.8
33
24
-
5
Austemperd
52.0
61
45
11
6
Austemperd
52.5
54
40
8
(Data from ASM metals Hand book)

Table2 Comparison of typical mechanical properties of austempered and of oil quenched and tempered sway bars of 1090 steel:

Property(a)
Austempered at 400°C(750°F) (b)
Quenched and tempered (c)
Tensile strength, MPa(ksi)
1415(205)
1340(200)
Yield strength, MPa(ksi)
1020(148)
895(130)
Elongation.%
11.5
6.0
Reduction of area,%
30
10.2
Hardness, HB
415
388
Fatigue cycles(d)
105000(e)
58600(f)

Remarks:
  (a)Average values. (d)Fatigue specimens 21mm (0.812 in.) in diameter.
  (b)Six tests. (e)Seven tests; range, 69050 to 137000.
  (c)Two tests. (f)Eight tests; range, 43 120 to 95 220.