Каталог Dormer Pramet фрезерование 2021 - 2022 - страница 7

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WORKPIECE MATERIAL GROUPS (WMG)

ISO

To select a cutting grade and geometry for a broad range of workpiece materials

General definitionSubgroupSubgroupTo navigate and select a tool by suitability
i.e. Steel, Stainless Steel...for a more specific range of workpiece materials
WMG
PMKNSHDefinitionTo select and provide cutting conditions
by structure/compositionwithin a bandwidth of ± 10 %
i.e. Plain Carbon Steel, Alloy Steel...
Definition
PH S N K Mby hardness/ultimate tensile strength
i.e. 160 < 220 HB, 620 < 900 N/mm 2 ...
P1
P
P2
P1P1.1 P1.2 P1.3
P3
P2P2.1 P2.2 P2.3
P4
P3P3.1 P3.2 P3.3
P4P4.1 P4.2 P4.3
ABOUT DORMER PRAMET’S WORKPIECE MATERIAL CLASSIFICATION
Workpiece Material Groups (WMG) are used to support easy andEach of these are divided into subgroups on the basis of their structure
reliable selection of the right cutting tool and starting values forand/or composition. For example, P-group steel and cast steel is split
machining conditions in particular applications.into four subgroups, namely;
Dormer Pramet classifies workpiece materials into six different• P1 – Free machining steel
coloured groups;• P2 – Plain carbon steel
  • Blue: Steel and cast steel (P-group)
  • P3 – Alloy steel
  • Yellow: Stainless steel (M-group)
  • P4 – Tool steel
  • Red: Cast iron (K-group) A final division includes material properties, such as hardness and
  • Green: Non-ferrous metals (N-group) ultimate tensile strength. This is to provide our customers with a
  • Brown: High-temperature alloys (S-group) complete tool recommendation, including starting values for cutting
  • Grey: Hardened materials (H-group) speed and feed.

The table on the next page includes a description of each workpiece material group, as well as examples of commonly used designations.