Workpiece Material Groups
Steel
ISO P – Steel is the largest material group, ranging from unalloyed to high-alloyed material and including steel castings and ferritic and martensitic stainless steels.
Stainless Steel
ISO M – Stainless steels are materials alloyed with a minimum of 12% chromium. Other alloys may include nickel and molybdenum.
Non-Ferrous Metal
ISO N – Non-ferrous metals are softer metals, such as aluminum, copper, brass, etc. Aluminum with a Si-content of 13% is very abrasive.
Super Alloys & Titanium
ISO S – Heat resistant super alloys include a great number of high-alloyed iron-, nickel-, cobalt- and titanium-based materials. They are sticky, create built-up edge.
Cast Iron
ISO K – Cast iron, unlike steel, is a short-chipping type of material. Gray cast irons (GCI) and malleable cast irons (MCI) are quite easy to machine, while nodular cast irons (NCI), compact cast irons (CGI) and austempered
cast irons (ADI) are more difficult.
Hard Material
ISO H – This group includes steels with a hardness between 45–65 HRC, and also chilled cast iron
Non ISO
O (Other): Non-ISO. Thermoplastics, thermosets, GFRP (Glass Fiber Reinforced Polymer/Plastic), CFRP (Carbon Fiber Reinforced Plastic), carbon fiber composites, aramid fiber reinforced plastic, hard rubber, graphite (technical). Various industries are now using composites to a greater extent, especially in the aerospace industry.
