Tool steel for hot working WWS, WWS1, X30WCrV5-3, 1.2567, Z32WCV5 according to PN-H-85021, ISO 4957.
| Standard | Steel Grade | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Chemical composition % | ||||||||||
| C: | Mn: | Si: | P: | S: | Cr: | Ni: | Mo: | V: | W: | |
| PN | WWS | |||||||||
| 0.25 - 0.35 | 0.20 - 0.50 | 0.80 - 1.20 | <0.03 | <0.03 | 1.10 - 1.50 | <0.35 | - | 0.20 - 0.40 | 4.0 - 5.0 | |
| PN | WWS1 | |||||||||
| 0.25 - 0.35 | 0.20 - 0.50 | 0.80 - 1.20 | <0.03 | <0.03 | 2.20 - 2.70 | <0.35 | - | 0.40 - 0.60 | 4.0 - 5.0 | |
| ISO | 30WCrV5 - X30WCrV5-3 - 1.2567 | |||||||||
| 0.25 - 0.35 | 0.20 - 0.40 | 0.15 - 0.30 | <0.035 | <0.035 | 2.20 - 2.50 | - | - | 0.50 - 0.70 | 4.0 - 4.5 | |
| NF | Z32WCV5 - X32WCrV5 | |||||||||
| 0.28 - 0.35 | 0.15 - 0.45 | 0.10 - 0.40 | - | - | 2.00 - 3.00 | - | - | 0.40 - 0.70 | 4.5 - 5.1 | |
| GOST | 4Ch2W5MF | |||||||||
| 0.30 - 0.40 | 0.10 - 0.45 | 0.10 - 0.40 | <0.030 | <0.030 | 2.20 - 3.00 | <0.4 | 0.6 - 0.9 | 0.60 - 0.90 | 4.5 - 5.5 | |
WWS, WWS1 tool steel
Hot working tool steel with high impact and shock sensitivity. It has a high resistance to tempering, stability at high temperatures, high hardenability and hardness. Unlike WWV, WWS/WWS1 has a higher thermal conductivity, resulting in a relatively lower heating sensitivity. The WWS1 grade is a better version of the WWS steel, enriched with chromium addition - the material achieves much higher hardness compared to WWS. Tools made of steel must be heated to a temperature of approx. 200°C before starting work and the tempering temperatures must not be exceeded.
The material is used for the production of dies and punches, moulds for casting aluminium and magnesium alloys, jaws for thread rolling, forging trimmings, as well as knives for hot cutting of products with large cross-sections. Other applications include screw and rivet production dies, extrusion dies, die inserts, dies for mechanical and hydraulic presses, forge stamps, compression/break-out stamps for screw heads, rivets and nuts. Sleeves for extrusion of non-ferrous metals, extrusion presses for extrusion of pipes and preforms from copper alloys, recipient sleeves. The material in the tempered condition reaches a hardness of min. 46 HRC.
Mechanical properties of WWS1
- Hardness in annealed condition +A: <241HB
- Hardness after hardening and tempering at temperature:
- 300C = 51.5 HRC
- 350C = 51.5 HRC
- 400C = 52.0 HRC
- 450C = 52.5 HRC
- 500C = 52.6 HRC
- 550C = 51.3 HRC
- 600C = 49.0 HRC
Mechanical properties of WWS
- Thermal conductivity: 38 W * m-1 * K-1
- Linear expansion coefficient: 12.2 * 10-6
- Hardness in annealed condition +A: <229HB
- Hardness after hardening and tempering at temperature:
- 300C = 49.5 HRC
- 350C = 49.8 HRC
- 400C = 50.5 HRC
- 450C = 51.0 HRC
- 500C = 51.5 HRC
- 550C = 50.0 HRC
- 600C = 48.0 HRC
- 650C = 42.0 HRC
Heat treatment of WWS steel - processes and temperatures:
- Softening annealing at temperature 740-780C with cooling in the furnace up to 550C, then in the air
- Relaxing at 600-700°C with slow furnace/air cooling
- Hardening at a temperature of 1000-1050C with cooling in oil
- Tempering at a temperature of 600 - 1100C with cooling in oil
Heat treatment of WWS1 - processes and temperatures:
- Softening annealing at temperature 740-780C with cooling in the furnace up to 550C, then in the air
- Relaxing at 600-700°C with slow furnace/air cooling
- Hardening at a temperature of 1040-1060C with cooling in oil
- Tempering at 500-600°C with air cooling
In the above mentioned grades the company delivers:
- Bars, rolled and forged flat bars WWS, WWS1, X30WCrV5-3, 1.2567
- Forgings WWS1, WWS, X30WCrV5-3, 1.2567
Other equivalents:
CSN 19740, AISI H7, 30WCrV15, VSCW45, W3, CSN 19720, 30WCrV17-9, SKD4, 30WCrV17-2, 4Ch2W5FM, X30WCrV53KU, Z32WCV5, 30WCrV5, X30WCrV5-3, 1.2567