Aços de ferramenta de alta velocidade de JIS SKH59 AISI M42 SS 2617 com superfície de trituração para as brocas de torção, GV BV

JIS SKH59 AISI M42 SS 2617 High Speed Tool Steels with Milling Surface for Twist Drills , SGS BV Descrition: E M42 is a highly cobalt alloyed high speed steel to be used when the demand for hot hardness is of great importance. E M42 has a good machinability and a good wear-resistance. Heat Treatment Soft annealing in a protective atmosphere at 850-900C, for 3 hours, followed by slow cooling at 10 C per hour down to 700 C, then air cooling. Stress-relieving at 600 C to 700 C