Forty five #
In the case of a steel material. A high-quality carbon structural steel.
A lot of mold production company will be used to do mold steel.
45, refers to the content of carbon in such material, probably around 450. Such material advantages compared to other carbon steel, are more common.
45 Steel: average carbon content of 0.42-0.50%, the average silicon content of 0.17-0.37%, the average manganese content of 0.50-0.80%, the average sulfur content of <= 0.035%, the average phosphorus content of <= 0.035% The average chromium content <= 0.25%, the average nickel content of <= 0.2545 steel
Carbonaceous about 0.45%.
Recommended heat treatment temperature
Normalizing: 850
Quenching: 840
Tempering: 600
Tensile strength: not less than 600Mpa
Yield strength: not less than 355Mpa
Elongation: 10%
Shrinkage: 40%
Impact energy: 39J
Delivery status steel hardness: not more than
No heat: 229HBS
Annealed steel: 197HBS