W.NR. 1.2085

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


Chemical composition (typical; in weight %)

CSiMnP (max)S (max)CrMoNi

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).

Physical properties (reference values)

Thermal expansion coefficient (10-6/K)10.510.71213.2
Thermal conductivity (W/mk)22.222.72124.5
Young modulus (Kn/mm2)215211203180

Critical points

Ac1 790 °C

Ac3 890 °C

Ms 190 °C

Heat treatment

AnnealingHeat to 850 - 880 °CMin. H.T. for 2 minute /mmAir or furnaceIn order to obtain hardness lower than 250 HB ( 24 HRC) to improve machinability
Stress relievingHeat to 590 - 650 °CMin. H.T. for 2 minute /mmAir or furnaceTo be carried out after machining, is recommended to eliminate the residual stresses induced by mechanical working
HardeningHeat to 1000-1050°CMin. H.T. for 1 minute /mmAir or Polymer (depending of size)-
TemperingHeat to 550 – 610°CMin. H.T. for 3 minute /mmAir of furnaceTo be carried out after hardening. 2nd Tempering must be performed to max 30°C below tempering temperature

C.C.T. curve


Tempering curve


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.