1. ASM (1990) Metals handbook, vol. 3. ASM, Materials Park, OH
2. Roberts GA, Hamaker JC Jr, Johnson AR (1962) Tool steels, 3rd edn. ASM, Metals Park, OH
3. Hadfield R (1892) Alloys of iron and chromium. J Iron Steel Inst 42:50–61
4. Hadfield R (1903) Alloys of iron and tungsten. J Iron Steel Inst 64:40–44
5. Gregg JL (1934) The alloys of iron and tungsten. McGraw-Hill Book Co, New York