| Equivalent grades |
GB |
DIN |
AISI |
JIS |
|
|
|
| W18Cr4V |
1.3355 |
T1 |
SKH2 |
| Chemical Composition |
C |
Si |
Mn |
Cr |
V |
W |
Mo |
|
| 0.65-0.80 |
0.20-0.40 |
0.10-0.40 |
3.75-4.50 |
0.90-1.30 |
17.25-18.25 |
0.03max |
|
| Available size |
Round Bar |
Diameter |
Length |
| 70-600mm |
2000-6000mm |
| Flat Bar |
Thickness |
Width |
Length |
| 25-400mm |
200-800mm |
2000-6000mm |
Smelting&
shaping |
EF/ ESR+ hot forged/ hot rolled |
| Surface condition |
Black surface/ Grinded/ Machined |
| Annealed hardness |
HBS≤262 |
| Characteristics |
high strength at elevated temperatures,good toughness, high compressive strength,good wear resistance. |
| Applications |
Tools for the machining of very hard metals, nickel, cobalt,titanium based alloys, broaches, cutters, twist drills, taps,cutting tools and cold work punches. |
| Heat Treatment |
The annealing temperature is 860 ~ 880 ℃. Generally, quenching divided into two stages. Preheated in 800 ~ 850 ℃(so as not to cause high thermal stress), and then heated to quenching temperature 1220 ～ 1250 ℃ rapidly, oil cooling. In order to make the transformation of retained austenite, further improve the hardness and wear resistance, the general should be 3 times tempering, tempering temperature 550 ～ 570 ℃, each holding 2 hours. |
 |
|
