Jun 17 2013
Topics Covered
Introduction
Chemical Composition
Physical Properties
Mechanical Properties
Thermal Properties
Other Designations
Applications
Introduction
Tools steels are special steels used to cut or change the shape of a material into a semi-finished or finished product. With a carbon content between 0.7% and 1.5%, tool steels are manufactured under carefully controlled conditions to produce the desired quality.
AISI H25 tool steel is a tungsten hot work steel having excess carbides, which make them hard and wear-resistant. The following datasheet will provide an overview of grade H25 tool steels.
Chemical Composition
The chemical composition of H25 tool steels is outlined in the following table.
|
Element |
Content (%) |
|
Tungsten, W |
14-16 |
|
Chromium, Cr |
3.75-4.5 |
|
Vanadium, V |
0.4-0.6 |
|
Nickel, Ni |
0.3 |
|
Copper, Cu |
0.25 |
|
Carbon, C |
0.22-0.32 |
|
Manganese, Mn |
0.15-0.4 |
|
Silicon, Si |
0.15-0.4 |
|
Phosphorus, P |
0.03 |
|
Sulfur, S |
0.03 |
Physical Properties
The following table shows the physical properties of H25 tool steels.
|
Properties |
Metric |
Imperial |
|
Density |
7.7-8.03 g/cm3 |
0.278 – 0.290 lb/in3 |
|
Melting point |
1370-1400°C |
2498-2552°F |
Mechanical Properties
The mechanical properties of H25 tool steels are displayed in the following table.
|
Properties |
Metric |
Imperial |
|
Tensile strength |
1158 MPa |
167.95 ksi |
|
Yield strength |
1034 MPa |
150 ksi |
|
Elongation |
15% |
15% |
|
Modulus of elasticity |
190-210 GPa |
27557- 30457 ksi |
|
Poisson’s ratio |
0.27-0.3 |
0.27-0.3 |
|
Hardness (@25°C) |
335 |
335 |
Thermal Properties
The thermal properties of H25 tool steels are given in the following table
|
Properties |
Metric |
Imperial |
|
Thermal expansion co-efficient |
16-17 µm/m°C |
8.8-9.4 µin/in°F |
|
Thermal conductivity |
16 W/mK |
110 BTU.in/hrft².°F |
Other Designations
The equivalent materials to H25 tool steels include the following:
Applications
The following are the list of applications of H25 tool steels:
-
Extrusion and hot forging dies
-
Hot piercing punches
-
Special structural steel