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1.2678
X45NiCrMo4
1.2678 (X45NiCrMo4) is a nickel-alloyed [[glossary:kaltarbeitsstahl|cold-work steel]] with 0.45 % [[element:C|carbon]], 4 % [[element:Ni|nickel]], [[element:Cr|chromium]], and [[element:Mo|molybdenum]]. The nickel makes it through-[[glossary:haerten|hardening]] and extremely tough. Use: highly stressed dies, molds, and machine parts that are subjected to impact and must not break.