Zg230-450 is a cast carbon steel, also known as ZG25 or No. 25 steel. 230 means that the yield strength of the steel casting is 230 mpa, and 450 means that the tensile strength of the steel casting is 450 mpa. ZG stands for pinyin abbreviation of cast steel and executes GB/T11352 standard. The building coupler made of this kind of material is cast steel coupler.
Zg230-450 carbon steel has good casting performance, high melting point, poor actual fluidity and easy oxidation. The casting shrinkage rate is about 1.5% ~ 2.0%, solidification shrinkage is about 4.2%, casting temperature is about 1500 ~ 1550℃, and it can be processed by cooling machine after cooling.