CUTTING SPEEDS MILLING
Recommended Starting Speeds v c (ft/min) MK1430 f z (inch)
Brinell Hardness HB
Rockwell Hardness HRC
Tensile Strength MPa
Material Group
ISO
Workpiece Material
.004 .008 .012
Gray Cast Iron Ex. Class 20, 25, 30, 35, 40, 45, 50, 55, 60, G1800, G3000, G3500, G4000
K1
120-290 <32 125-500 790 655 490
Ductile Cast Irons (Nodular Irons) and Compacted Graphite Irons (CGI) Ex. 60-40-18, 65-45-12, 80-55-06, SAE J434: D4018, D4512, D5506
K Cast Iron
K2
130-260 <28
<600 720 590 460
High-Strength Ductile Irons and Austempered Ductile Irons (ADI) Ex. ASTM A536: 100-70-03, 120-90-02, SAE J434: D7003
K3
180-350 <43
>600 655 525 430
Recommended Starting Speeds v c (ft/min) MK1430 f z (inch)
Brinell Hardness HB
Rockwell Hardness HRC
Tensile Strength MPa
Material Group
ISO
Workpiece Material
.004 .008 .012
Iron-Based Heat-Resistant Alloys Ex. A286, A608, INCOLOY 800 Series, N-155, Haynes 556, Discaloy
S1
160-260 25-48 500-1200 180 150 115
Cobalt-Based Heat-Resistant Alloys Ex. Haynes 25 (L605), Haynes 188, Stellite, MAR-M302, MAR-M509
S2
250-450 25-48 1000-1450 150 110 -
S High Temp Alloys
Nickel-Based Heat-Resistant Alloys
S3
160-450 <48 600-1700 160 120 -
Ex. Astroloy, Hastelloy X, INCONEL 600 and 700 Series, Waspalloy
Titanium and Titanium Alloys Ex. Commercially Pure Ti, Ti-5Al-2.5Sn, Ti-6Al-4V, Ti-3Al-8V-6Cr-4Zr-4Mo
S4
300-400 33-48 900-1600 170 130 -
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