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Tool and Die Steel Includes Cold Work Steel, Hot Work Steel, Plastic Mould Steel, High Speed Steel. These tool materials adhere to great quality demands of steel like temper, strength, toughness, resistance to tempering, hardening capacity, dimensional stability etc. The range of Tool Steel in our store includes products from renowned manufacturers.
Main characteristics and applications
Pre-hardened Martensitic stainless chromium steel with excellent corrosion resistance, higher than similar Cr grades (i.e. WW.NR. 1.2083) characterized by special alloying with the addition of Sulphur.
WW.NR. 1.2085 is used for core parts and mould bases of corrosion resistance plastic moulds or where equipment needs to be made with excellent workability and excellent corrosion resistance.
Comparable standards
| DIN | W.Nr | AFNOR | AISI/SAE | JIS |
|---|---|---|---|---|
| - | 1.2085 | ~Z33CS16 | ~442+S | - |
Chemical composition (typical; in weight %)
| C | Si | Mn | P (max) | S (max) | Cr | Mo | Ni |
|---|---|---|---|---|---|---|---|
| 0.28-0.38 | <1.00 | <1.40 | 0.030 | 0.05-0.10 | 15.00-17.00 | - | - |
Production technology
EAF – LF – VD - Forging – Heat treatment QT
US specification
In according to standard EN10228-3 Class 4 and standard SEP 1921 Class E/e
Delivery condition
WW.NR. 1.2085 is delivered in quenched and tempered condition, with hardness range 280 - 325 HB (29 – 35 HRC).
Critical points
Ac1 800 °C
Ac3 910 °C
Ms 200 °C
Physical properties (reference values)\
| 20°C | 100°C | 250°C | 500°C | |
|---|---|---|---|---|
| Thermal expansion coefficient (10-6/K) | 10.4 | 10.7 | 11 | 11.9 |
| Thermal conductivity (W/mk) | 23.5 | 23.9 | 24.2 | 23.2 |
| Young modulus (Kn/mm2) | 218 | 209 | 202 | 180 |
Heat treatment
| TREATMENT | TEMPERATURE | HOLDING TIME (HT) | COOLING | COMMENTS | |
|---|---|---|---|---|---|
| Annealing | Heat to 770 - 820 °C | Min. H.T. for 2 minute /mm | Furnace up to 600°C than in air | - | |
| Stress relieving | Heat to 550 - 600 °C | Min. H.T. for 2 minute /mm | Air or furnace | To be carried out after machining, is recommended to eliminate the residual stresses induced by mechanical working | |
| Hardening | Preheating to 600-700°C Austenitizing to 1000 - 1050 °C | Min. H.T. for 1 minute /mm | Polymer or gas air | Qunched hardness 50 HRC | |
| Tempering | - | - | Air | To be carried out after hardening. 2nd Tempering must be performed to max 30°C below tempering temperature | |
C.C.T. curve
Tempering curve
