What is M42 made of?
WM M-42 is a molybdenum cobalt high speed steel capable of being hardened to 70 Rockwell C. The carbon content is higher than in most high speed steels, and with this balanced composition, contributes to wear resistance and hot hardness as well as the high hardness capability. M42 is a premium powder metallurgy high speed steel grade with exceptional hardness and superior toughness. This high-cobalt tungsten-molybdenum powder metallurgy steel offers excellent performance compared to conventional M42 grades, providing enhanced properties for demanding applications.
What is the difference between the BMW M42 and M44?
Compared with the M42, the M44 has roller rocker arms, a hot-wire MAF, displacement increased from 1. L (110 to 116 cu in) and other detail changes such as a grey cast iron crankshaft replacing the forged steel item from the previous M42. M42B18. The M42B18 has a displacement of 1,796 cc (109.M50B25. The 2,494 cc (152. M50B25 was introduced with the 1990 525i and 525ix. It has a bore of 84 mm (3. W (192 PS; 189 hp) at 6,000 rpm and 245 N⋅m (181 lb⋅ft) at 4,700 rpm.