SM45 mold steel, what material is SM45?

规格：

齐全

价格：

合理

材料：

保证

Material properties: Steel is high-quality carbon plastic mold steel. Compared with high-quality carbon structural steel, the sulfur and carbon content in the steel is low, and the cleanliness of the steel is good. Due to the poor hardenability of this steel, when manufacturing larger-sized plastic molds, hot rolling, hot forging or normalizing are generally used. The hardness of the mold is low and the wear resistance is poor. Supplied in the quenched and tempered state, it has higher hardness and better strength and toughness. The carbon content in steel is high and cracks are prone to occur during water quenching, so oil quenching is generally used. The advantages of this steel are that it is cheap, has good machinability, has high hardness after quenching, and has good strength, toughness and certain wear resistance after quenching and tempering. It is widely used in the manufacture of small and medium-sized, medium- and high-grade plastics. mold.
This steel is a flat steel or hot-rolled thick steel plate used for plastic molds. It is cheap and has good machining performance.
Availability status
Flat steel for plastic molds is specified by B/~, the width of the flat steel is ~, and the thickness is ~.
Hot rolled state, hardness ~B.
Chemical composition
According to standard B/~, the chemical composition (mass fraction) of this steel: ~.,.~.3,.~.,.3,.3.
Reference corresponding grades
Chinese Taiwan standard grade, Japanese standard grade, American standard grade, German standard grade, British B standard grade, French standard grade, Chinese B standard grade
Critical point temperature (approximate value )

℃, 3
℃, r
℃, r3
℃
Hot processing specifications
Steel ingot: furnace entry temperature ℃, heating Temperature ~ ℃, start temperature ~ ℃, end temperature ℃, pit cold or pile cold.
Steel billet: heating temperature 3~℃, start temperature ~℃, end temperature ℃, pit cooling or pile cooling.
Post-forging annealing specifications
Annealing temperature ~ ℃, heat preservation ~ and then furnace cooling.
High Temperature Tempering (Recrystallization Annealing) Specifications
Tempering (annealing) temperature ~℃, air cooling after exiting the furnace.
Normalizing specifications
Normalizing temperature is 3~℃, keep warm and then come out of the furnace for air cooling.
For larger size plastic molds, they can be used after normalizing and then tempering.
Quenching and tempering specifications
Quenching temperature ~ ℃, oil cooling or water cooling, tempering temperature ~ ℃, air cooling after insulation, hardness ~.
Typical application examples
) It can be used in molds for daily groceries, toys and other plastic products.
) for small plastic molds.