DURO-V50 pages

DURO-V5
Special steel for cold working precise die and mold
DURO-V5
Well balanced steel in high wear
resistance and high toughness!!
Better
DURO-V5 is made by using NACHI's original
steel manufacturing and refining technologies. It
combines the toughness of Matrix HSS with the
wear resistance that is higher than SKH51 (M2).
High purification reduces levels of non-metallic
inclusions for super toughness and great fatigue
strength
Carbide volume and size are the best controlled to
get superior balance of toughness and wear
resistance.
DURO Series
V2
Toughness
F1
V5
F3, F7
PM HSS
* Matrix HSS
SKH51 (M2)
SKD11 (D2)
SP
HSS
Die and mold steel
Better
Wear resistance
* Matrix HSS: Tough HSS grades with less carbides.
Features
Applications
Cold working
die and mold steel
Features
Hardness (HRC)
Higher wear resistance than Matrix HSS or SKH51 (M2).
Good toughness like Matrix HSS and higher than SKH51 (M2).
Well balanced wear resistance and toughness in the range of 60 to 62 HRC.
56 ~ 62
Applications
Fine-blanking die for hard-workable materials like high-tensile
steel sheets
Thin round punch which requires toughness
Thin or complex shape blanking punch which requires toughness
Die and mold for cold forging
Mandrel for flow-forming process
Heat treatment conditions
Recommended heat treatment conditions
Quenching
Tempering
Hardness
(°C)
(°C)
(HRC)
[For toughness]
1140
580 × 2 times
60.0
[Standard]
1160
560 × 2 times
62.0
Heat treatment hardness (HRC)
Hardness chart
66
64
62
Quenching
temperature
1160°C
1140°C
1120°C
1100°C
1080°C
60
58
56
* Hardness may be 2 HRC lower than this chart if you use vacuum furnace.
54
AsQ
540
560
580
600
Tempering temperature (°C)