Ease of processing the material commonly used in machining
Ease of processing the material commonly used in machining
Relative workability machining commonly used materials
First, the general non-ferrous metal
Machined rating: 1
Processing properties of the material: it is easy to process
Relative workability K: 8 ~ 20
Representative material: aluminum-magnesium alloy, copper-lead alloy 5-5-5
Second, cutting steel
Machined rating: 2
Processing properties of the material: easy processing
Relative workability K: 2.5 ~ 3
Representative materials: steel automaton (σb = 400 ~ 500MPa)
Third, the easier cutting steel
Machined rating: 3
Machining processing properties of materials: easy processing
Relative workability K: 1.6 ~ 2.5
Representative material: 30 steel normalizing (σb = 500 ~ 580MPa)
Fourth, the general steel and cast iron
Machined rating: 4
Processing properties of the material: Ordinary
Relative workability K: 1.0 ~ 1.5
Representative materials: 45 steel, gray cast iron
Fifth, a little difficult to cut materials
Machined rating: 5
Processing properties of the material: Ordinary
Relative workability K: 0.7 ~ 0.9Representative material: 85 rolling, 2Cr13 quenching (σb = 850MPa)
Six machining difficult to cut materials
Machined rating: 6
Processing properties of materials: hard working
Relative workability K: 0.5 ~ 0.65
Representative material: 65Mn quenching (σb = 950 ~ 1000MPa), cutting stainless steel
Seven machining difficult to cut materials
Machined rating: 7
Processing properties of materials: hard working
Relative workability K: 0.15 ~ 0.5
Representative material: stainless steel (1Cr18Ni9Ti)
Eight, difficult to cut materials
Machined rating: 8
Processing properties of materials: hard working
Relative workability K: 0.04 ~ 0.14
Machining typical material: heat-resistant alloy, titanium
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