|
|
|
 © 2008
Disclaimer
|
|
|
708M40 708M40T
|
 |
|
 |
|
708M40 is a high tensile alloy steel usually supplied readily machineable in ‘T’ condition. 708M40 offers good ductility and shock resisting properties combined with resistance to wear. 708M40 can be flame or induction hardened.
|
|
TYPICAL ANALYSIS
|
708M40
|
|
|
C.
|
Si.
|
Mn.
|
Cr.
|
Mo.
|
|
0.40%
|
0.25%
|
0.70%
|
1.20%
|
0.20%
|
Hardening:
Heat uniformly the 708M40 tool to 820/840°C until heated through. Quench in oil.
Tempering:
Heat the 708M40 tool uniformly and thoroughly at the selected tempering temperature, and hold at heat for one hour per inch of total thickness.
Mechanical Properties 708M40
|
Heat
Treatment
|
Tensile
Strength
Rm N/mm²
|
Yield
Stress
Re N/mm²
|
a% on
5.665ÖSo
|
Impact
Izod J
|
Impact
KCV J
|
Proof
Stress
rp0.2
|
Hardness
HB
|
Size
mm
|
|
R
|
700/850
|
495
|
15
|
34
|
28
|
480
|
201/225
|
>100≤250
|
|
S
|
775/925
|
555
|
13
|
27
|
22
|
540
|
223/277
|
>150≤250
|
|
S
|
775/925
|
585
|
15
|
54
|
50
|
570
|
223/277
|
>63≤150
|
|
T
|
850/1000
|
680
|
13
|
54
|
50
|
665
|
248/302
|
>29≤100
|
|
U
|
925/1075
|
755
|
12
|
47
|
42
|
740
|
269/331
|
>13≤63
|
|
V
|
1000/1150
|
850
|
12
|
47
|
42
|
835
|
293/352
|
>6≤29
|
|
W
|
1075/1225
|
940
|
12
|
40
|
35
|
925
|
311/375
|
>6≤19
|
Available sections:
|
|
|
sales@westyorkssteel.com
 
|
|
Stainless Steel Suppliers |
Steel specifications |
Alloy Steel |
Steel-Stockholders |
Tool Steel Stockholders |
Tool Steel
Gauge Steel |
Engineering Steel |
High Speed Steel
West Yorkshire Steel Ltd, Sandbeck Industrial Estate, Wetherby, Leeds. LS22 7DN UK.
Telephone: 0845 6581304 Facsimile: 0845 6581305 sales@westyorkssteel.com |
|
