Twin screwsTo fight wear MAXI MELT offers twin screw elements in a large scale of materials resistant to abrasive and corrosive wear.

For screw elements we offer a wide scale of materials and treatments to fight wear. For less severe wear conditions the most economical solution is a nitrided element. Whether wear resistance is requested hardened screw elements offer a longer life time reducing your costs. Different solutions are indicated in the table below indicating the specific resistance to abrasive and corrosive wear. For the shaft we recommend  nitrided steel with a high torque resistance.

Twin screws

Base materials for plasticizing screws

DIN standard Material Type steel Treatment Hardness Abrasion resistance Corrosion resistance
1.8509 41CrAlMo7 Nitriding steel Nitrided 950 – 1100 HV5 x x
1.8550 34CrAINi7 Nitriding steel Nitrided 950 – 1100 HV5 x x
1.2379 X155CrVMo121 Tool steel Hardened 59 – 63 HRC xxx xx
KPM1 PM material Hardened 58 – 63 HRC xxxx xxx
KPM2 PM material Hardened 55 – 60 HRC xxx xxxxx
Suitability: (x good) to (xxxxx excellent). PM is powder material. Other materials avaiable on request.