Introduction
OHNS O-1 is a oil hardening and non shrinking cold work steel with good edge holding ability, high hardening steel.
Steel Properties : Good edge-holding ability, high hardenability, close tolerance on heat treatment.
Applications : Blanking and stamping dies for cutting sheet metals up to 6 mm thickness, threading tools, drills, broaches, measuring tools, plastic moulds, shear blades.
Chemical Composition : (%)
| C | Si | Mn | Cr |
|---|---|---|---|
| 0.85-0.95 | 0.20-0.40 | 1.00-1.30 | 0.40-0.60 |
| Mo | W | V | P | S |
|---|---|---|---|---|
| -- | 0.40-0.60 | 0.10 | -- | -- |
Grades Equivalent :
| STANDARD | BRAZIL | AUSTRIA | SWEDEN |
|---|---|---|---|
| 1.2510 | VND | K460 | -- |
| EN | SLOVANIA | ITALY | JIS |
|---|---|---|---|
| 100MnCrW4 | OW4 | -- | SKS3 |
| S.KOREA | CZECH REP. | CHINA | AMERICA |
|---|---|---|---|
| -- | STABIL K | 9CrWMn | O-1 |
Production Process :
Round Bar :
Flat Bar :
Hardness : ≤HB230
| UT Standard : | Reduction Ratio : | Delivery Status : |
| SEP 1921, (DEC.84)E/e | As 1:4 or 1:5 | in annealed condition. |
Sizes of Round Bars :
| Cold Drawn/Centreless Ground Bar | Hot Rolled & Annealed Peeled | Forged Annealed Turned |
| Φ 2.0 - 14.4mm | Φ 14.5 - 80.0mm | Φ 81.0 - 610.0mm |
Sizes of Hot Rolled Flat Bars / Sand Blasted & Machined Straight :
| Thickness | Width |
| 14mm - 100mm | 200mm - 710mm |
Sizes of Sheets :
| Thickness | Width | Length |
| 0.5mm - 12mm | 810mm | 2500mm |
Heat Treatments :
| Soft annealing °C | Hardening from °C | Cooling |
| 740-770 | 780-820 | Furnace |
| in | Hardness after quenching HRC |
| Oil or hot bath 180-220 °C | 64 |
| Tempering°C | 100°C | 200°C | 300°C | 400°C |
| HRC | 64 | 62 | 57 | 53 |
