1. Applications:
Highest stressed twist drills, taps and cutters, heavy duty milling, drilling, turning and planing tools of all types, cold work tools, sectional tools of all kind, woodworking tools, hobs, reamers, saws, knives, broaches, profile cutting blades, machining of high strength materials, trimming dies, punches, tools for high cutting speeds, highly stressed dies and tools for in cold shearing and extrusion processes, cold forming tools.
2. Chemical composition：
|
Grade
|
Standard
|
C
|
Si
|
Mn
|
Cr
|
Mo
|
V
|
W
|
P、S≤
|
Co
|
|
1.3243
|
DIN
|
0.87-0.95
|
≤0.45
|
≤0.40
|
3.80-4.50
|
4.70-5.20
|
1.70-2.10
|
5.90-6.70
|
0.030
|
4.50-5.00
|
3. Mechanical properties:
High speed steel alloyed with tungsten, molybdenum and 5 % cobalt, excellent cutting and edge holding properties, high red hardness and resistance to tempering, high wear resistance and toughness, excellent compression strength, fine grain size and carbide particle size. Suitable for thermal stresses and continuous cutting.
4. Conditions of delivery：
EAF/ESR，forged/hot rolled，black/turned(milled), annealed
Soft annealed to max. 280 HB
5. Available sizes:
Round Bar: Φ 6-410mm
Flat: 8-160*205-710mm
Mould: 200*200-1200*1000mm
Length: 3000-6000mm
6. Physical properties:
|
Temperature [oC]
|
100
|
200
|
300
|
500
|
|
Thermal expansion [10-6.K-1]
|
11.5
|
11.7
|
12.2
|
12.7
|
|
Temperature [oC]
|
20
|
Density
|
||
|
Heat conductivity [W.m-1.K-1]
|
19
|
8.10kg/dm3
|
||
7. Heat treatment:
|
Soft annealing:
|
Temperature [oC]
|
Cooling
|
Hardness
|
|
|
770-840
|
Furnace
|
max. 280 HB
|
||
|
Stress relief annealing
|
Temperature [oC]
|
Cooling
|
|
|
|
600-650
|
Furnace
|
|
|
|
|
Hardening and tempering:
|
Austenization [oC]
|
Quenching media
|
Tempering
|
|
|
1190-1230
|
oil, Salt bath, Vacuum 500 - 550°C
|
see tempering
diagram
|
||
Tempering: 550 - 580 °C
Hardness after tempering: 64 - 66 HRC
