W.NR. 12316

Main characteristics and applications

Pre-hardened stainless martensitic chrome- molybdenum steel with excellent resistance to corrosion, higher than similar Cr grades (i.e. WW.NR. 1.2083), good polishing and photoengraving properties.

Its applications are equipments and plastic moulds, particularly for corrosive plastic as PVD.

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. 1.2316 is delivered in quenched and tempered condition, with hardness range 280 - 325 HB (29 – 35 HRC) or in annealed condition with hardness max 240 HB (23 HRC)

Critical points

Ac1 800 °C

Ac3 910 °C

Ms 200 °C

Physical properties (reference values)

Thermal expansion coefficient (10-6/K)10.410.71111.9
Thermal conductivity (W/mk)23.523.924.223.2
Young modulus (Kn/mm2)218209202180

Heat treatment

AnnealingHeat to 770 - 820 °CMin. H.T. for 2 minute /mmFurnace up to 600°C than in air -
Stress relievingHeat to 550 - 600 °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
HardeningPreheating to 600-700°C Austenitizing to 1000 - 1050 °CMin. H.T. for 1 minute /mmPolymer or gas air Qunched hardness 50 HRC
Tempering--AirTo 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.