Workpiece Material Groups Steel kcw 1 1 (lbs/in2) mcw Low-carbon soft steel low tensile ferritic steel 260,950 0 1062 Low-carbon free cutting ste

Workpiece Material Groups Steel kcw 1.1 (lbs/in2) mcw Low-carbon soft steel low tensile ferritic steel 260,950 0.1062 Low-carbon free cutting steel 178,400 0.1063 Normal stuctural steel, low to medium content of carbon (< 0.5% C) 247,200 0.1062 P Normal, low-alloy steel and steel casting tempering steel carbon steel (> 0.5% C) ferritic and martensitic stainless steel 274,700 0.1062 Normal tool steel harder tempering steel martensitic, stainless steel 247,200 0.1062 Tool steel featuring difficult cutting properties hard, high-alloyed steel and steel casting martensitic, stainless steel 274,700 0.1062 High tensile steel with difficult cutting properties hardened steels of the groups 3 -6 martensitic, stainless steel 302,150 0.1063 Stainless Steel Stainless steel featuring less difficult cutting properties, calcium treated stainless steel 185,400 0.1063 M Molybdenum stainless steel austenite and duplex, difficult cutting properties 206,000 0.1062 Austenite and duplex featuring difficult cutting properties 247,200 0.1062 Austenite and duplex featuring extremely difficult cutting properties 271,900 0.1063 Cast Iron Cast iron of medium hardness, grey cast iron 192,300 0.1061 K Low-alloyed cast iron, malleable cast iron, nodular cast iron 211,500 0.1061 Cast iron alloy of medium hardness, malleable cast iron, GGG, medium cutting properties 221,100 0.1061 High-alloyed cast iron with difficult cutting properties malleable cast iron, GGG, difficult cutting properties 230,700 0.1061 NF Metal N Nonferrous alloys which are easy to machine, Aluminum with <16% Si, brass, zinc, magnesium 82,400 0.1062 Nonferrous alloys which are difficult to machine Aluminum with >16% Si, bronze, copper, Aluminum alloys (nickel, copper, magnesium) 82,400 0.1062 High Temperature Alloys and Titanium Alloys High temperature alloys containing nickel, cobalt, iron, hardness <30 HRc, Incoly 800 and Inconel 601, 617 and 625, Monel 400 302,150 0.1062 S High temperature alloys containing nickel, cobalt, iron, hardness >30 HRc, Inconnel 718 and 750-X and Incoloy 925, Monel K-5008 332,350 0.1062 Titanium alloys, Ti-6Al-4V 178,550 0.1061 The kcw 1.1 and mcw values should be used only with the listed formulas on pages 239, 405, and 641. kcw 1.1 value specific cutting force with a rake angle of 0°. With other rake angles, kcw 1.1 should be increased/decreased accordingly, i.e. 1% each degree of rake angle. H 7 WALTER General technical information