Aug 13 2013
Topics Covered
Introduction
Chemical Composition
Physical Properties
Mechanical Properties
Thermal Properties
Other Designations
Introduction
Tungsten high-speed tool steels are designated group T steels according to the AISI classification system and range from T1 to T15. These steels have similar characteristics to those of molybdenum high-speed tool steels. The following sections will discuss T5 tool steels in more detail.
Chemical Composition
The following table shows the chemical composition of T5 tool steels.
|
Element |
Content (%) |
|
Tungsten, W |
17.50-19.00 |
|
Chromium, Cr |
3.75-5.00 |
|
Vanadium, V |
1.80-2.40 |
|
Carbon,C |
0.75-0.85 |
|
Molybdenum, Mo |
0.50-1.25 |
|
Nickel, Ni |
0.3 |
|
Copper, Cu |
0.25 |
|
Silicon, Si |
0.20-0.45 |
|
Manganese, Mn |
0.20-0.40 |
|
Phosphorus, P |
0.03 |
|
Sulfur, S |
0.03 |
|
Iron, Fe |
Balance |
Physical Properties
The physical properties of T5 tool steels are given in the following table.
|
Properties |
Metric |
Imperial |
|
Density |
8.75 g/cm3 |
0.316 lb/in3 |
Mechanical Properties
The mechanical properties of T5 tool steels are tabulated below.
|
Properties |
Metric |
Imperial |
|
Poisson's ratio |
0.27-0.30 |
0.27-0.30 |
|
Elastic modulus |
190-210 GPa |
27557-30458 ksi |
Thermal Properties
The following table shows the thermal properties of T5 tool steels.
|
Properties |
Conditions |
|
T (ºC) |
Treatment |
|
Thermal expansion |
11.2 x 10-6/ºC |
20-100 |
- |
Other Designations
Other designations that are equivalent to T5 tungsten tool steels include:
-
DIN 1.3265
-
UNI KU
-
JIS SKH 4A
-
B.S. BT 5
-
ASTM A600
-
FED QQ-T-590
-
SAE J437
-
SAE J438
-
UNS T12005