21YRS
WU JII INDUSTRY CO., LTD.
886-4-23593510
886-4-23593529
No. 1, 20th Rd., Industrial Park, Taichung City, Taiwan
www.wujii.com.twProducts
Specification
|
DIN material NO.:1.2379 ISO-B |
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| Chemical composition |
C |
Cr |
Mo |
V |
Mn |
Si |
|
1.55 |
11.5 |
0.7 |
1.0 |
0.36 |
0.3 |
|
|
Steel properties : Ledeburitic-high-carbon high chromium steel. Highest wear-resistance, good toughness. Best edge-holding quality and retention to tempering; the steel can be nitrided after a special heat treatment. |
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|
Applications : Thread rollings and thread rolling dies, cold extrusion tools, blanking and stamping tools, circular shear blades, deep drawing tools, pressure pads and highly wear-resistant plastic moulds. |
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| Heat treatment |
Soft annealing | Cooling | Hardness | ||||||
| 830~860°C | Slow in the furnace | HB250max | |||||||
| Hardening | Cooling | Hardness after quenching | |||||||
| 1000~1050°C | 500~550°C oil or hot bath | HRC63 | |||||||
| Tempering°C |
100 |
200 |
300 |
400 |
500 |
525 |
550 |
600 |
|
| HRC |
63 |
61 |
58 |
58 |
58 |
60 |
56 |
50 |
|
| Special heat treatment |
Higher temperature hardening | Cooling | Hardness after quenching | ||||||
| 1050~1080°C | 500~550°C oil or hot bath | HRC61 | |||||||
| 3 rd tempering °C |
100 |
200 |
300 |
400 |
500 |
525 |
550 |
600 |
|
| HRC |
61 |
60 |
58 |
59 |
62 |
62 |
57 |
50 |
|
