bimetallic screws for injection molding

Nitriding steels:
DIN 31CrMoV9, DIN 1.8519; DIN 34CrAlNi7, DIN 1.8550; DIN 41CRALMO7, DIN 1.8509, DIN 1.8507
EN41B, JIS SACM645, GB 38CrMoAlA, etc.
Stainless steels:
304, DIN 1.4301, 316L, DIN X2CrNiMo17-12-2, DIN 1.4404, DIN X35CrMo17, DIN 1.4122
Tool steel and Powder metallurgy steel:
DIN X155CrVMo121, DIN 1.2379, Böhler M390(PM Stahl)
Hardfacings against corrosion and wear:
Nickel base alloy: Colmonoy 56, Colmonoy 57, Colmonoy #83, Colmonoy #83
Tungsten Carbide hardfacing
The structure of our tungsten carbide hardfacing consists of an austenitic matrix on nickel basis, with up to 45% tungsten carbides embeded. This is the best available hard-facing. It has outstanding properties concerning wear protection as well as corrosion protection. Because of the very high hardness of this hard-facing, it is impossible to achieve a crack-free surface.
Cobalt base alloy: Stellite 6, Stellite 12
Important notes:
For all kind of hard-facings it has to be taken into account, that tension cracks in the surface may occur. The harder the hard-facing, the higher is the number of cracks. But these cracks are a normal phenomenon which do not have any negative influence on the quality and lifetime of your screw.
Please do not hesitate to contact us in case of any questions concerning these cracks. 
Material: inyectadas con PA6 y PA66, PP, PPO, ABS, PC, ABS/PC, PBT, PPE+PA, ASA, ASA/PC, PMMA, POM, aditivados con cargas minerales, fibra de vidrio, etc.
Makes: Krauss Maffei, Billion, Engel, Sandretto, Boy, Negri Bossi, Margarit, Demag, Netstal, MIR, Remu, Haitian, etc.